Download or read book Solution processed Small Molecule Bulk Heterojunction Organic Solar Cells Molecular Morphological Interfacial and Device Engineering written by Jie Min and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in High Efficient Solution Process Organic Photovoltaic Devices written by Yang Yang and published by Springer. This book was released on 2015-02-17 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an important technique to process organic photovoltaic devices. The basics, materials aspects and manufacturing of photovoltaic devices with solution processing are explained. Solution processable organic solar cells - polymer or solution processable small molecules - have the potential to significantly reduce the costs for solar electricity and energy payback time due to the low material costs for the cells, low cost and fast fabrication processes (ambient, roll-to-roll), high material utilization etc. In addition, organic photovoltaics (OPV) also provides attractive properties like flexibility, colorful displays and transparency which could open new market opportunities. The material and device innovations lead to improved efficiency by 8% for organic photovoltaic solar cells, compared to 4% in 2005. Both academic and industry research have significant interest in the development of this technology. This book gives an overview of the booming technology, focusing on the solution process for organic solar cells and provides a state-of-the-art report of the latest developments. World class experts cover fundamental, materials, devices and manufacturing technology of OPV technology.
Download or read book High Performance Multi Component Organic Solar Cells written by Ismail Alperen Ayhan and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renewable energies significantly gained in importance in the last decade. Due to worldwide ecological problems and global warming, much effort is needed to increase the awareness and protect earth from the impacts with respect to the climate changes. Particularly, the excessive use of fossil fuels force countries to figure out some alternative applications for the energy supply. Other than hydro and wind-based applications, solar energy becomes the most important renewable technology to reduce the carbon dioxide emission and worldwide photovoltaic systems have recently been installed by gradually rising. Since only China and India are building several coal powers every week for energy needs based-on their population1, it is very important to develop efficient and low-cost solar energy systems to attract attention for especially newly develop countries other than develop ones. Organic solar cells (OSCs) are one of the most promising solar energy systems due to some unique advantages, such as low-cost, lightweight, flexible, semitransparent, large area compatibility, easy fabrication (roll to roll), easy processing (from solution), and energy level tunability, which enables new fields of applications. In contrast to inorganic solar cells, high temperature fabrication techniques are not needed to prepare organic photovoltaics. In solution processed OSCs, the organic semiconductor materials are used in active layer to absorb light and convert it to electrical energy. The active layers containing donor and accepter components where the optimized morphology is achieved through an interpenetrating phase-separated donor-acceptor network that is called as bulk heterojunction. The efficiency of bulk heterojunction OSCs is strongly correlated with the morphology of their active layers, which requires an optimized distribution of the donor and acceptor domains. A large interface between donor and acceptor domains are needed to obtain efficient exciton dissociation at interface. Also, percolation pathways are required to transport the charges to the corresponding electrodes. The nanomorphology depends on tendency of the active layer components to crystallization and phase-separation. These morphological properties can be optimized by altering the process parameters, such as selection of materials and solvents, composition, thickness, and thermal treatments. Recently, OSCs has been remarkably enhanced with power conversion efficiency exceeding 16% by virtue of new materials development and device optimizations.2--4 It is commonly known that the limited absorption window of organic semiconductors causes low photon-harvesting ability from active layer. Multi-component organic solar cells, which consist of one donor and two acceptors, are a promising strategy for broadening the light absorption spectrum and enhancing the power conversion efficiency (PCE) of the organic photovoltaic devices, due to the diverse small molecular materials with different optical band gaps and good compatibility. In this dissertation, the binary and ternary blend systems were studied through optimizing processing parameters and the effect of these parameters on the structural, morphological, electrical and photovoltaic properties were investigated by performing UV-vis absorption, EQE measurement, Grazing-Incidence Wide-Angle X-ray Scattering (GIWAXS) and energy-filtered transmission electron microscopy (EFTEM). In the first part of dissertation, it is found that optimized blends share a universal fibril-like structure, where the polymer donor appears to dictate fibril size. In the second part of section, the effect of third component in ternary blend OSCs is discussed where the optimum morphology is achieved and if the ternary blend systems also have similar morphology such as fibril-like structure. As expected, the ternary blend system showed significant enhancement of device performance due to broadening of the absorption spectrum and the fill factor. We attribute that the high morphology compatibility of the ternary system can benefit to optimized electron/hole mobility and diminished recombination.
Download or read book Interfacial Engineering for Highly Efficient Conjugated Polymer Based Bulk Heterojunction Photovoltaic Devices written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of our proposal is to apply interface engineering approach to improve charge extraction, guide active layer morphology, improve materials compatibility, and ultimately allow the fabrication of high efficiency tandem cells. Specifically, we aim at developing: i. Interfacial engineering using small molecule self-assembled monolayers ii. Nanostructure engineering in OPVs using polymer brushes iii. Development of efficient light harvesting and high mobility materials for OPVs iv. Physical characterization of the nanostructured systems using electrostatic force microscopy, and conducting atomic force microscopy v. All-solution processed organic-based tandem cells using interfacial engineering to optimize the recombination layer currents vi. Theoretical modeling of charge transport in the active semiconducting layer The material development effort is guided by advanced computer modeling and surface/ interface engineering tools to allow us to obtain better understanding of the effect of electrode modifications on OPV performance for the investigation of more elaborate device structures. The materials and devices developed within this program represent a major conceptual advancement using an integrated approach combining rational molecular design, material, interface, process, and device engineering to achieve solar cells with high efficiency, stability, and the potential to be used for large-area roll-to-roll printing. This may create significant impact in lowering manufacturing cost of polymer solar cells for promoting clean renewable energy use and preventing the side effects from using fossil fuels to impact environment.
Download or read book Semiconducting and Metallic Polymers written by Alan J. Heeger and published by OUP Oxford. This book was released on 2010-07-29 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique properties of conducting and semiconducting (conjugated) polymers make them one of the most attractive areas of interdisciplinary materials science and technology. Written by a pioneer in the field, this book is the first aimed at teaching graduate students, postdoctoral scientists, and specialists in industry about this exciting field.
Download or read book World Scientific Handbook Of Organic Optoelectronic Devices Volumes 1 2 written by and published by World Scientific. This book was released on 2018-06-29 with total page 909 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic (opto)electronic materials have received considerable attention due to their applications in perovskite and flexible electronics, OPVs and OLEDs and many others. Reflecting the rapid growth in research and development of organic (opto)electronic materials over the last few decades, this book provides a comprehensive coverage of the state of the art in an accessible format. It presents the most widely recognized fundamentals, principles, and mechanisms along with representative examples, key experimental data, and over 200 illustrative figures.
Download or read book Organic Solar Cells written by Pankaj Kumar and published by CRC Press. This book was released on 2016-10-03 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains detailed information on the types, structure, fabrication, and characterization of organic solar cells (OSCs). It discusses processes to improve efficiencies and the prevention of degradation in OSCs. It compares the cost-effectiveness of OSCs to those based on crystalline silicon and discusses ways to make OSCs more economical. This book provides a practical guide for the fabrication, processing, and characterization of OSCs and paves the way for further development in OSC technology.
Download or read book Study of Solution processed Small Molecules and Fullerene Derivatives for Bulk Heterojunction Solar Cells written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Optoelectronic Materials written by Yongfang Li and published by Springer. This book was released on 2015-05-30 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume reviews the latest trends in organic optoelectronic materials. Each comprehensive chapter allows graduate students and newcomers to the field to grasp the basics, whilst also ensuring that they have the most up-to-date overview of the latest research. Topics include: organic conductors and semiconductors; conducting polymers and conjugated polymer semiconductors, as well as their applications in organic field-effect-transistors; organic light-emitting diodes; and organic photovoltaics and transparent conducting electrodes. The molecular structures, synthesis methods, physicochemical and optoelectronic properties of the organic optoelectronic materials are also introduced and described in detail. The authors also elucidate the structures and working mechanisms of organic optoelectronic devices and outline fundamental scientific problems and future research directions. This volume is invaluable to all those interested in organic optoelectronic materials.
Download or read book Advances in Electronic Materials for Clean Energy Conversion and Storage Applications written by Aftab Aslam Parwaz Khan and published by Elsevier. This book was released on 2023-03-24 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Electronic Materials for Clean Energy Conversion and Storage Applications reviews green synthesis and fabrication techniques of various electronic materials and their derivatives for applications in photovoltaics. The book investigates recent advances, progress and issues of photovoltaic-based research, including organic, hybrid, dye-sensitized, polymer, and quantum dot-based solar cells. There is a focus on applications for clean energy and storage in the book. Clean energy is defined as energy derived from renewable resources or zero-emission sources and natural processes that are regenerative and sustainable resources such as biomass, geothermal energy, hydropower, solar and wind energy. Materials discussed include nanomaterials, nanocomposites, polymers, and polymer-composites. Advances in clean energy conversion and energy storage devices are also reviewed thoroughly based on recent research and developments such as supercapacitors, batteries etc. Reliable methods to characterize and analyze these materials systems and devices are emphasized throughout the book. Important information on synthesis and analytical chemistry of these important systems are reviewed, but also material science methods to investigate optical properties of carbon-nanomaterials, metal oxide nanomaterials and their nanocomposites. - Reviews the latest advances in electronic materials synthesis, fabrication and application in energy - Discusses green, cost-effective, simple and large-scale production of electronic materials - Includes critical materials and device characterization techniques that enhance our understanding of materials' properties and measure device performance
Download or read book Handbook of Organic Materials for Electronic and Photonic Devices written by Oksana Ostroverkhova and published by Woodhead Publishing. This book was released on 2018-11-30 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Organic Materials for Electronic and Photonic Devices, Second Edition, provides an overview of the materials, mechanisms, characterization techniques, structure-property relationships, and most promising applications of organic materials. This new release includes new content on emerging organic materials, expanded content on the basic physics behind electronic properties, and new chapters on organic photonics. As advances in organic materials design, fabrication, and processing that enabled charge unprecedented carrier mobilities and power conversion efficiencies have made dramatic advances since the first edition, this latest release presents a necessary understanding of the underlying physics that enabled novel material design and improved organic device design. - Provides a comprehensive overview of the materials, mechanisms, characterization techniques, and structure property relationships of organic electronic and photonic materials - Reviews key applications, including organic solar cells, light-emitting diodes electrochemical cells, sensors, transistors, bioelectronics, and memory devices - New content to reflect latest advances in our understanding of underlying physics to enable material design and device fabrication
Download or read book Small Molecule Semiconductors for High Efficiency Organic Solar Cells written by Chuanlang Zhan and published by Frontiers Media SA. This book was released on 2019-08-15 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solution processable Oligomeric and Small Molecule Semiconductors for Organic Solar Cells written by Mylène Le Borgne and published by . This book was released on 2016 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic solar cells appear as a promising technology within photovoltaic field owing to their low-cost fabrication and their great flexibility enabling a widespread distribution. For now, they are still at the prototype stage due to their limited efficiency and lifetimes. Many efforts were realized in designing new materials as they are involved in every steps of the photovoltaic process and thus they dictate the cell efficiency. Along this thesis, two series of electron-donating semi-conductors were designed and synthesized. The first series consist in three oligomers containing three diketopyrrolopyrrole units, a well-studied chromophore. Those oligomers absorb up to the near infra-red region, a very interesting feature for light harvesting. Through the engineering of electron-rich spacers, various twists were generated in the oligomers backbone. The oligomer showing a coplanar conformation appears to be the most crystalline and thus exhibits the best charge transport properties with a hole mobility of 10-3 cm2.V-1.s-1. However, bulk heterojunction organic solar cells, this high crystallinity results in an unfavorable morphology and a PCE inferior to 1%. As for the second series, the four small molecules combined 3,3'-(ethane-1,2-diylidene)bis(indolin-2-one) (EBI), an electron deficient unit, and various electron-rich units such as thiophene (EBI-T), benzofuran (EBI-BF) and bithiophene (EBI-2T). Among EBI derivatives, EBI-BF demonstrated the highest hole mobility of 0.021 cm2.V-1.s-1 in field effect transistors due to its coplanar conformation. Meanwhile, in bulk heterojunction solar cells, the highest PCE of 1.92% was obtained with EBI-2T:PC61BM blend owing to a more appropriate morphology and the broadest absorption spectrum of EBI-2T.
Download or read book Molecular Devices for Solar Energy Conversion and Storage written by Haining Tian and published by Springer. This book was released on 2017-09-14 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows the different molecular devices used for solar energy conversion and storage and the important characterization techniques for this kind of device. It has five chapters describing representative molecule-based solar cells, such as organic solar cells, dye-sensitized solar cells and hybrid solar cells (perovskite solar cell and quantum dots solar cells). It also includes two chapters demonstrating the use of molecular devices in the areas of solar fuel, water splitting and carbon dioxide reduction. There are further two chapters with interesting examples of solar energy storage related devices, like solar flow battery, solar capacitor and solar energy-thermal energy storage. Three chapters introduce important techniques used to characterize, investigate and evaluate the mechanism of molecular devices. The final chapter discusses the stability of perovskite solar cells. This book is relevant for a wide readership, and is particularly useful for students, researchers and industrial professionals who are working on molecular devices for solar energy utilization.
Download or read book Organic Photovoltaics written by Sam-Shajing Sun and published by CRC Press. This book was released on 2017-12-19 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently developed organic photovoltaics (OPVs) show distinct advantages over their inorganic counterparts due to their lighter weight, flexible shape, versatile materials synthesis and device fabrication schemes, and low cost in large-scale industrial production. Although many books currently exist on general concepts of PV and inorganic PV materials and devices, few are available that offer a comprehensive overview of recently fast developing organic and polymeric PV materials and devices. Organic Photovoltaics: Mechanisms, Materials, and Devices fills this gap. The book provides an international perspective on the latest research in this rapidly expanding field with contributions from top experts around the world. It presents a unified approach comprising three sections: General Overviews; Mechanisms and Modeling; and Materials and Devices. Discussions include sunlight capture, exciton diffusion and dissociation, interface properties, charge recombination and migration, and a variety of currently developing OPV materials/devices. The book also includes two forewords: one by Nobel Laureate Dr. Alan J. Heeger, and the other by Drs. Aloysius Hepp and Sheila Bailey of NASA Glenn Research Center. Organic Photovoltaics equips students, researchers, and engineers with knowledge of the mechanisms, materials, devices, and applications of OPVs necessary to develop cheaper, lighter, and cleaner renewable energy throughout the coming decades.
Download or read book Phthalocyanines written by Leznoff, C. C. (Clifford C.) and published by New York : VCH, 1989-c1996.. This book was released on 1989 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date and written by leading experts, this book is unique in a rapidly expanding field. It provides in-depth discussions and descriptions of the materials, electronic properties and applications of phthalocyanines. Aspects of phthalocyanines covered include * synthesis * polymer aspects * electronic spectroscopy * excited state chemistry and physics * chemical sensors * biological aspects (e.g. photodynamic therapy of cancer) The numerous tables, chemical structures, and references are particularly handy source materials for both the novice and experienced researcher and industrial practitioner interested in phthalocyanines.
Download or read book Conjugated Polymers written by John R. Reynolds and published by CRC Press. This book was released on 2019-03-25 with total page 853 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers properties, processing, and applications of conducting polymers. It discusses properties and characterization, including photophysics and transport. It then moves to processing and morphology of conducting polymers, covering such topics as printing, thermal processing, morphology evolution, conducting polymer composites, thin films
