Download or read book Determination of the Interfacial Electronic Structure and Morphology of Organic Semiconductor Materials written by Paul G. Schroeder and published by . This book was released on 2002 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Non Local Density of States of Electronic Excitations in Organic Semiconductors written by Carl. R Poelking and published by Springer. This book was released on 2017-10-24 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the microscopic understanding of the function of organic semiconductors. By tracing the link between their morphological structure and electronic properties across multiple scales, it represents an important advance in this direction. Organic semiconductors are materials at the interface between hard and soft matter: they combine structural variability, processibility and mechanical flexibility with the ability to efficiently transport charge and energy. This unique set of properties makes them a promising class of materials for electronic devices, including organic solar cells and light-emitting diodes. Understanding their function at the microscopic scale – the goal of this work – is a prerequisite for the rational design and optimization of the underlying materials. Based on new multiscale simulation protocols, the book studies the complex interplay between molecular architecture, supramolecular organization and electronic structure in order to reveal why some materials perform well – and why others do not. In particular, by examining the long-range effects that interrelate microscopic states and mesoscopic structure in these materials, the book provides qualitative and quantitative insights into e.g. the charge-generation process, which also serve as a basis for new optimization strategies.

Download or read book Studying the Density of States of Buried Interfaces in Organic Semiconductor Thin Films Using Electronic Sum Frequency Generation written by Aaron Patrick Moon and published by . This book was released on 2019 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: New nanostructured semiconductor materials such as nanocrystals and organic semiconductors constitute an attractive platform for optoelectronics design due to the ease of their processability and highly tunable properties. Incorporating these new nanostructured materials into electrical circuits requires forming junctions between them and other layers in a device, yet the change in dielectric properties about these junctions can strongly perturb the electronic structure of the two layers. Specifically, the morphology of the interface between two materials greatly affect their ability to transfer charge and energy through the system, and the method through which this energy travels across a junction is poorly understood. To study these processes, an interfacial technique is required that measures the Density of States (Dos) at buried interfaces in working devices. In this thesis, we adapt an interface-selective optical technique, electronic sum frequency generation (ESFG), to study the dynamics of energy transfer across interfaces in these materials. We begin by developing “direct” detected ESFG to study the electronic states and morphology at the interface of thin films made from known organic semiconductor materials. Using direct ESFG, we examine the differences in the DoS at an interface in an organic thin film relative to its bulk. Through polarization optics, we study morphological changes in the film caused at the junction of the OSC and substrate. To account for interference from multiple ESFG active interfaces present in a thin film, we use a modeling system to separate contributions to the measured ESFG signal from the air exposed and buried interface of interest. We then adapt the direct detected ESFG to “heterodyne” detected ESFG (HD-ESFG), which significantly increases the detection ability of the ESFG spectrometer. Additionally, HD-ESFG allows us to measure the phase of the materials response, which direct ESFG cannot. This phase information can give a better understanding of the morphology at the interface and additional inputs for thin film interference modeling to better deconvolute the signal from the buried interface

Download or read book Interfaces of Electrical Contacts in Organic Semiconductor Devices written by Korhan Demirkan and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in organic semiconductor devices relies on better understanding of interfaces as well as material development. The engineering of interfaces that exhibit low resistance, low operating voltage and long-term stability to minimize device degradation is one of the crucial requirements. Photoelectron spectroscopy is a powerful technique to study the metal-semiconductor interfaces, allowing: (i) elucidation of the energy levels of the semiconductor and the contacts that determine Schottky barrier height, (ii) inspection of electrical interactions (such as charge transfer, dipole formation, formation of induced density of states or formation of polaron/bi-polaron states) that effect the energy level alignment, (iii) determination of interfacial chemistry, and (iv) estimation of interface morphology. In this thesis, we have used photoelectron spectroscopy extensively for detailed analysis of the metal organic semiconductor interfaces. In this study, we demonstrate the use of photoelectron spectroscopy for construction of energy level diagrams and display some results related to chemical tailoring of materials for engineering interfaces with lowered Schottky barriers. Following our work on the energy level alignment of poly(p-phenyene vinylene) based organic semiconductors on various substrates [Au, indium tin oxide, Si (with native oxide) and Al (with native oxide)], we tested controlling the energy level alignment by using polar self assembled molecules (SAMs). Photoelectron spectroscopy showed that, by introducing SAMs on the Au surface, we successfully changed the effective work function of Au surface. We found that in this case, the change in the effective work function of the metal surface was not reflected as a shift in the energy levels of the organic semiconductor, as opposed to the results achieved with different substrate materials. To investigate the chemical interactions at the metal/organic interface, we studied the metallization of poly(2-methoxy-5,2'-ethyl-hexyloxy-phenylene vinylene) (MEH-PPV), polystyrene (PS) and ozone treated polystyrene (PS-O3) surfaces by thermal deposition of aluminum. Photoelectron spectroscopy showed the degree of chemical interaction between Al and each polymer, for MEH-PPV, the chemical interactions were mainly through the C-O present in the side chain of the polymer structure. The chemical interaction of Al with polystyrene was less significant, but it showed a dramatic increase after ozone treatment of the polystyrene surface (due to the formation of exposed oxygen sites). Formation of metal oxide and metal-organic compound is detected during the Al metallization of MEH-PPV and ozone-treated PS surfaces. Our results showed that the condensation of Al on polymer surfaces is highly dependent on surface reactivity. Enormous differences were observed for the condensation coefficient of Al on PS and PS-O3 surfaces. For the inert PS surface, results showed that Al atoms poorly wet the polymer surface and form distributed clusters at the surface. Results on reactive polymer surfaces suggest morphology reminiscent of a Stranski- Krastanov-type growth and high contact area. Many studies have shown that the insertion of a thin interlayer of the oxide or fluoride of alkali or alkaline metals between the low work function electrode and the organic semiconductor layers dramatically lowers the onset voltage and increases the efficiency compared to identical devices without the insulating layer. Various modes have been suggested for the mechanism of device performance enhancement. We have investigated the chemical and electrical interaction of (i) LiF with MEH-PPV, (ii) Al with MEH-PPV in the presence of a thin LiF layer at the interface, and finally (iii) the interaction of Al with LiF. AFM and XPS data showed that LiF forms island on the surface. Our data in agreement with various existing models suggested the (i) alteration in the electronic properties under applied bias, (ii) doping of the organic semiconductor, (iii) formation of metal alloy (Au-Li). In addition to the possible electrical modifications at the interface suggested previously, our data also suggest a change in the film growth on LiF modified surfaces.

Download or read book Electronic Processes in Organic Semiconductors written by Anna Köhler and published by John Wiley & Sons. This book was released on 2015-04-22 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first advanced textbook to provide a useful introduction in a brief, coherent and comprehensive way, with a focus on the fundamentals. After having read this book, students will be prepared to understand any of the many multi-authored books available in this field that discuss a particular aspect in more detail, and should also benefit from any of the textbooks in photochemistry or spectroscopy that concentrate on a particular mechanism. Based on a successful and well-proven lecture course given by one of the authors for many years, the book is clearly structured into four sections: electronic structure of organic semiconductors, charged and excited states in organic semiconductors, electronic and optical properties of organic semiconductors, and fundamentals of organic semiconductor devices.

Download or read book Surface and Interface Studies of Organic Semiconductors written by Huanjun Ding and published by . This book was released on 2010 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In recent decades, research and development of organic based semiconductor devices have attracted intense interest. One of the most essential elements is the understanding of the electronic structures at various interfaces involved in these devices, as the interface properties control many of the critical electronic processes. However, the conventional theories developed for inorganic semiconductors are often adopted without further experimental confirmation in the design of innovative organic electronic devices. It is, thus, necessary to study the electronic properties of organic semiconductors with surface analytical tools, in order to improve our understanding of the fundamental mechanism involved in the interface formation. This thesis covers experimental investigations on some of the most interesting topics raised in the recent development of organic electronic devices. The intent of this thesis is to reveal the physical processes at the interface and their contributions to the device performance with photoemission and inverse photoemission investigations on the evolution of the occupied and unoccupied electronic structures. The topics include alkali metal doping, insertion layers, spin injection and organic single crystal studies. The electronic structure modification induced by alkali metal doping in tris-(8-hydroxyquinoline) aluminum (Alq) and copper phthalocyanine (CuPc) will be discussed. Based on the experimental observations, I propose a two-stage model to describe the doping effect in organic materials, which differs significantly from the classical theories used for inorganic semiconductors. I investigate the electronic structure of a number of insertion layers used in organic electronic devices, and the mechanisms of the induced performance improvement are discussed based on the observed interface properties. Next, I examine the spin injection and dynamics for organic thin films. Efficient spin injection for the hot electrons across the interface is demonstrated with spin and time-resolved two photon photoemission (STR-2PPE). Finally, I describe my studies about a particularly interesting organic material -- rubrene. The band structure measurement of rubrene single crystal samples is presented with angle-resolved photoemission spectroscopy (AR-PES). The energy level alignment at the interfaces between the rubrene thin film and various metal substrates and the morphology of the amorphous films prepared under various growth conditions are also discussed"--leaves viii-ix.

Download or read book Physical and Chemical Aspects of Organic Electronics written by Christof Wöll and published by John Wiley & Sons. This book was released on 2009-04-22 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic molecules are currently being investigated with regard to their application as active components in semiconductor devices. Whereas devices containing organic molecules for the generation of light - organic light emitting diodes (OLED) - have already reached the market (they e.g. display information on mobile phones), transistors where organic molecules are used to actively control currents and voltages are still in the development stage. In this book the principle problems related to using organic materials as semiconductors and to construct functioning devices will be addressed. A particular emphasis will be put on the difference between inorganic semiconductors such as Si, Ge and GaAs and organic semiconductors (OSC). The special properties of such soft matter require particular approaches for processing characterization and device implementation, which are quite different from the approach used for conventional semiconductors.

Download or read book Understanding the Morphology at Donor acceptor Interfaces in Organic Semiconductors written by Zixuan Guo and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic electronic devices, including organic photovoltaics (OPV), organic light-emitting diodes (OLEDs), and organic field-effect transistors (OFETs), have become increasingly important in consumer electronic applications due to the development of organic semiconductors, including organic small molecules, and conjugated polymers. They have advantages such as light weight, flexibility/stretchability, and the ability for roll-to-roll manufacturing. The structure and mechanism of organic devices are analogous to inorganic semiconductor devices, where donor materials (p-type) and acceptor materials (n-type) are used to create interfaces. To build high-performance organic electronic devices, it is essential to understand functionalities of organic heterojunction because they are building blocks of electronics. Organic heterojunction is interfaces created between donor and acceptor organic semiconductors. Exciting electronic action of devices occurs at organic interfaces. From a fundamental viewpoint, the role of interfaces must have optimal electronic and physical communication to yield highly efficient devices. From a technological viewpoint, one must understand, control, and have a rational design of the desired electronic and optical properties at organic interfaces for the development of different electronics and a host of potential new device concepts that have not yet been developed or realized. In this dissertation, we will use organic semiconductors for organic photovoltaics (OPV) as an example to investigat organic heterojunction interfaces, including interface fabrication, epitaxy, morphology control, and characterization, with the aim of building high-performance devices with good stability. We begin by discussing the growth of organic single-crystalline crystals with controlled orientations. Materials used are two small molecules: zinc phthalocyanine (ZnPc, p-type) and 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA, n-type). In this study, a self-built vertical physical vapor transport (v-PVT) chamber is used for crystallization, and a graphene-coated substrate is used to control molecular packing. Although ZnPc and PTCDA have a planar molecular shape and face-on packing motif on graphene, we find that they have different growth modes. Such growth mechanism difference can be explained by competition between intermolecular and molecule-graphene interactions. We then continue the abovementioned study by building model heterojunctions on graphene substrates using ZnPc and PTCDA. We discover that thermodynamics and kinetics of the system affect P-N junction morphology. We find that ZnPc and PTCDA form the "line-on-line" organic weak epitaxy at heterojunction interfaces from X-ray studies and crystallography refinement. We also verify that P-N junctions can generate electron-hole pairs. This work will advance the knowledge and create enabling opportunities to fabricate single-crystalline-oriented nanostructures. Besides using organic small molecules, we also explore the structure-property-performance relationship of conjugated block copolymers (BCPs) for OPV applications. In this work, a new donor-acceptor BCP is synthesized and added into polymer blend solar cells. We find that adding BCP could potentially retain the relative degree of crystallinity of [pi]-[pi] stacking regions, and decrease the detrimental interaction between donor polymer and electrode under thermal stress, thus improving the solar device's thermal stability by 30%. Finally, we explore the possibility of using graphene engineering for epitaxial growth dynamics control of organic small molecules. We determine that two distinct, alternating morphologies of ZnPc crystals are simultaneously observed on a single epitaxial SiC-graphene substrate. We hypothesize that the different morphologies arise from electronic structure and surface energy differences of underlying SiC-graphene regions ZnPc is grown on. The result will enable selective patterning of organic semiconductors for use in advanced warfare device applications. We hope these studies throughout this work will advance knowledge on fundamental crystallization mechanisms, interface engineering, morphology control, and characterization in organic crystalline systems. This work could further produce various future architectures for different applications in organic electronics.

Download or read book Electronic Structure of Organic Semiconductors written by Luís Alcácer and published by Morgan & Claypool Publishers. This book was released on 2018-12-07 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in the perspective of an experimental chemist, this book puts together some fundamentals from chemistry, solid state physics and quantum chemistry, to help with understanding and predicting the electronic and optical properties of organic semiconductors, both polymers and small molecules. The text is intended to assist graduate students and researchers in the field of organic electronics to use theory to design more efficient materials for organic electronic devices such as organic solar cells, light emitting diodes and field effect transistors. After addressing some basic topics in solid state physics, a comprehensive introduction to molecular orbitals and band theory leads to a description of computational methods based on Hartree-Fock and density functional theory (DFT), for predicting geometry conformations, frontier levels and energy band structures. Topological defects and transport and optical properties are then addressed, and one of the most commonly used transparent conducting polymers, PEDOT:PSS, is described in some detail as a case study.

Download or read book Electronic Structure of Organic Semiconductors written by Luis Alcácer and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Written from the perspective of an experimental chemist, this book puts together some fundamentals from chemistry, solid state physics and quantum chemistry, to help with understanding and predicting the electronic and optical properties of organic semiconductors, both polymers and small molecules. The text is intended to assist graduate students and researchers in the field of organic electronics to use theory to design more efficient materials for organic electronic devices, such as organic solar cells, light emitting diodes and field effect transistors. After addressing some basic topics in solid state physics, a comprehensive introduction to molecular orbitals and band theory leads to a description of computational methods based on Hartree-Fock and density functional theory (DFT), for predicting geometry conformations, frontier levels and energy band structures. Topological defects and transport and optical properties are then addressed, and one of the most commonly used transparent conducting polymers, PEDOT:PSS, is described in some detail as a case study." -- Prové de l'editor.

Download or read book Electronic Structure of Conjugated Materials and Their Effect on Organic Photovoltaics written by Chuanfei Wang and published by Linköping University Electronic Press. This book was released on 2017-11-15 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The great tunability of structure and electronic properties of ?-conjugated organic molecules/polymers combined with other advantages such as light weight and flexibility etc., have made organic-based electronics the focus of an exciting still-growing field of physics and chemistry for more than half a century. The application of organic electronics has led to the appearance of wide range of organic electronic devices mainly including organic light emitting diodes (OLED), organic field effect transistors (OFET) and organic solar cells (OSC). The application of the organic electronic devices mainly is limited by two dominant parameters, i.e., their performance and stability. Up to date, OLED has been successfully commercialized in the market while the OSC are still on the way to commercialization hindered by low efficiency and inferior stability. Understanding the energy levels of organic materials and energy level alignment of the devices is crucial to control the efficiency and stability of the OSC. In this thesis, energy levels measured by different methods are studied to explore their relationship with device properties, and the strategies on how to design efficient and stable OSC based on energy level diagrams are provided. Cyclic Voltammetry (CV) is a traditional and widely used method to probe the energy levels of organic materials, although there is little consensus on how to relate the oxidation/reduction potential ((Eox/Ered) to the vacuum level. Ultraviolet Photoelectron Spectroscopy (UPS) can be used to directly detect vertical ionization potential (IP) of organic materials. In this thesis, a linear relationship of IP and Eox was found, with a slope equal to unity. The relationship provides for easy conversion of values obtained by the two techniques, enabling complementarily use in designing and fabricating efficient and stable OSC. A popular rule of thumb is that the offset between the LUMO levels of donor and acceptor should be 0.3 eV, according to which a binary solar cell with the minimum voltage losses around 0.49 V was designed here. Introduction of the ternary blend as active layer is an efficient way to improve both efficiency and stability of the OSC. Based on our studied energy-level diagram within the integer charge transfer (ICT) model, we designed ternary solar cells with enhanced open circuit voltage for the first time and improved thermal stability compared to reference binary ones. The ternary solar cell with minimum voltage losses was developed by combining two donor materials with same ionization potential and positive ICT energy while featuring complementary optical absorption. Furthermore, the fullerene acceptor was chosen so that the energy of the positive ICT state of the two donor polymers is equal to the energy of negative ICT state of the fullerene, which can enhance dissociation of all polymer donor and fullerene acceptor excitons and suppress bimolecular and trap-assistant recombination. Rapid development of non-fullerene acceptors in the last two years affords more recipes of designing both efficient and stabile OSC. We show in this thesis how non-fullerene acceptors successfully can be used to design ternary solar cells with both enhanced efficiency and thermal stability. Besides improving the efficiency of the devices, understanding of the stability and degradation mechanism is another key issue. The degradation of conjugated molecules/polymers often follow many complicated pathways and at the same time many factors for degradation are coupled with each other. Therefore, the degradation of non-fullerene acceptors was investigated in darkness by photoelectron spectroscopy in this thesis with the in-situ method of controlling exposure of O2 and water vapor separately.

Download or read book Low Molecular Weight Organic Semiconductors written by Thorsten U. Kampen and published by John Wiley & Sons. This book was released on 2011-08-04 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date reference for students and researchers in the field is the first systematic treatment on the property measurements of organic semiconductor materials. Following an introduction, the book goes on to treat the structural analysis of thin films and spectroscopy of electronic states. Subsequent sections deal with optical spectroscopy and charge transport. An invaluable source for understanding, handling and applying this key type of material for physicists, materials scientists, graduate students, and analytical laboratories.

Download or read book Organic Semiconductor Materials and Devices written by J. Weidner and published by The Electrochemical Society. This book was released on 2008-04 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers included in this issue of ECS Transactions were originally presented in the symposium ¿Organic Semiconductor Materials and Devices¿, held during the 212th meeting of The Electrochemical Society, in Washington, DC, from October 7 to 12, 2007.

Download or read book Electronic Structure of Metal Semiconductor Contacts written by Winfried Mönch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interface and surface science have been important in the development of semicon ductor physics right from the beginning on. Modern device concepts are not only based on p-n junctions, which are interfaces between regions containing different types of dopants, but take advantage of the electronic properties of semiconductor insulator interfaces, heterojunctions between distinct semiconductors, and metal semiconductor contacts. The latter ones stood almost at the very beginning of semi conductor physics at the end of the last century. The rectifying properties of metal-semiconductor contacts were first described by Braun in 1874. A physically correct explanation of unilateral conduction, as this deviation from Ohm's law was called, could not be given at that time. A prerequisite was Wilson's quantum theory of electronic semi-conductors which he published in 1931. A few years later, in 1938, Schottky finally explained the rectification at metal-semiconductor contacts by a space-

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electronic Structure of Heterocyclic Organic Semiconductors written by Maria Benedetta Casu and published by . This book was released on 2002 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Role of Interfacial Static and Dynamic Disorder on High Performance Organic Field effect Transistors written by Jwala Adhikari and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The internet and electronic devices have become integral to our everyday life. As the world is beginning to march towards the Internet of Things, surging interest has been focused on low-cost functional electronics. However, the industry of electronics is inundated with traditional inorganic semiconductors. Silicon and germanium based inorganic semiconductors are rigid and fragile, requiring expensive processing. On the other hand, organic semiconductors based electronic devices, namely field effect transistors (FETs) and light-emitting diodes (LEDs), offer a feasible alternative to their inorganic counterparts. Not only are organic semiconductors soft and flexible, but they also possess advantages such as solution processability and chemical modifications. Despite the lucrative advantages, the performance of organic semiconductor-based devices is significantly lower. For instance, the highest hole mobility in one of the best performing organic FETs is two orders of magnitude lower than in inorganic transistors. Moreover, the behavior of organic semiconductors is very complex and is readily susceptible to their surroundings. Due to such complex nature of organic semiconductors, an unambiguous road map to high-performing organic FETs (OFETs) is still missing. The focus of this dissertation is on elucidating and tuning different factors that govern the performance of OFETs. An OFET is a complex structure comprised of three metal electrodes, an active layer (semiconducting layer) and a gate insulator (dielectric layer). One of the key parameters that determine the performance of OFETs is charge carrier mobility. The charge mobility of an OFET is affected by various factors--mainly the chemical structure of an active layer material, the morphology of an active layer and the interactions at the semiconductor-dielectric interface. To understand the role of chemical structure on the performance of organic semiconductor, octyl side-chains are added to [1]benzothieno[3,2-b]benzothiophene (BTBT) core. BTBT is a liquid crystalline material with poor solubility and weak semiconducting properties. The addition of alkyl side-chains is expected to increase the solubility of the core. However, the average FET hole mobility in the single crystalline BTBT with two octyl side-chains (C8BTBT) ([mu] = 6.0±1.0 cm2/V-1s-1) is three orders of magnitude higher than in the single crystalline BTBT core itself. The use of a single crystalline layer rules out any morphological effect on the performances. Moreover, the intrinsic charge transport parameters of single crystals predicted using Density Functional Theory (DFT) calculations remain essentially the same. Since both morphology and crystal structure seem to have virtually no effect on the measured charge mobilities of BTBT derivatives, what else could have affected the charge mobilities? It is hypothesized that inter-molecular dynamics may be an unaccounted factor. To probe the collective inter-molecular motions--also known as phonon--inelastic neutron scattering (INS) is performed. The results from INS show that lattice vibrations are significant in the BTBT core. In contrast, the vibration modes are completely diminished in C8BTBT, suggesting that the addition of octyl side-chains suppresses lattice vibrations in the BTBT core. The alkyl side-chain assisted reduced electron-phonon coupling may have led to the enhanced hole mobility in C8BTBT. In addition, the morphology of C8BTBT thin films is also optimized to improve an average hole mobility in FETs. It has been found that by melting and quenching spun-cast C8BTBT films, the average hole mobility of FETs is improved by a factor of five. Grazing incidence wide angle X-ray scattering (GIWAS) results show that the melting and quenching enhanced crystal texturing and led to stronger orientation order in the C8BTBT films. The melting and quenching process is believed to be vital in obviating the processing history and in controlling the thermodynamic driving force for crystallization. The effect of a gate insulator on the performance of FETs is also investigated using a novel, photopatternable, high-k fluoropolymer, poly(vinylidene fluoride-bromotrifluoroethylene) P(VDF-BTFE), where the BTFE moieties enable cross-linking through thermal- or photo-curing of dielectric materials with relative permittivities between 8 and 11. Organic single crystal field effect transistors based on rubrene active layers and crosslinked P(VDF-BTFE) gate dielectrics have shown hole mobilities as high as 12 cm2V-1s-1, three times higher than the average hole mobilities for devices comprising PVDF-based fluoropolymers or SiO2 as the dielectric layer. FETs comprising cross-linked P(VDF-BTFE) dielectric layers show the smallest interfacial trap density among all other fluorinated PVDF-based polymers, leading us to believe that cross-linking P(VDF-BTFE) films reduces energetic disorder at the dielectric-semiconductor interface. Fourier transform infrared spectroscopy results suggest that crosslinking enhances the population of trans conformations with respect to the neat polymer, demonstrating that cross-linking minimizes interfacial charge traps and hence enhances hole mobility by tuning chain conformations.