Download or read book Study on the Optical and Electrical Properties of Copper doped ZnO Thin Film written by 蔡宗憲 and published by . This book was released on 2009 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ZnO Thin Films for Optoelectronic Applications written by Prasada Rao Talakonda and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) thin films have good electro-optical properties suitable for opto-electronic applications. The present study explains the deposition and characterization of n-type and p-type ZnO thin films by spray pyrolysis. The films were characterized by different methods to understand their structural, optical and electrical properties. Gallium was chosen as the impurity dopant in ZnO films to improve the electrical properties. The electrical conductivity, carrier concentration and mobility of Ga doped ZnO (GZO) films were highly improved in comparison to undoped ZnO films. The GZO films showed good optical transmittance in the visible region. The electrical and optical results suggest that the GZO films are suitable to use as a TCO in optoelectronic industries. The p-type ZnO thin films were successesfully realized using dual acceptor method. The Hall measurements and room temperature photolumiscence results were supported p-type nature of (Li, N): ZnO thin films.

Download or read book Structural Optical and Electrical Properties of Undoped and Doped ZnO Thin Films written by Bruno Chandrasekar L and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: ZnO, which has high electrochemical stability, wide band gap energy, large excitonic binding energy, intense near band excitonic emission and is non-toxic, have potential applications in all fields. This chapter reviews the structural, optical and electrical properties of undoped and doped ZnO thin films. The type of doping highly influences the structural properties such as grain size, texture coefficient and unit cell properties. The dopants of transition metal and nonmetals have unique characteristics. Moreover, mono-doping and co-doping encourage this research. The optical properties such as bandgap, charge carrier concentrations and transmissions of the films depend on the doping as well as the preparation condition of the films. The effect of doping on its properties is also discussed.

Download or read book Ion Beam Modification of Solids written by Werner Wesch and published by Springer. This book was released on 2016-07-14 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the method of ion beam modification of solids in realization, theory and applications in a comprehensive way. It provides a review of the physical basics of ion-solid interaction and on ion-beam induced structural modifications of solids. Ion beams are widely used to modify the physical properties of materials. A complete theory of ion stopping in matter and the calculation of the energy loss due to nuclear and electronic interactions are presented including the effect of ion channeling. To explain structural modifications due to high electronic excitations, different concepts are presented with special emphasis on the thermal spike model. Furthermore, general concepts of damage evolution as a function of ion mass, ion fluence, ion flux and temperature are described in detail and their limits and applicability are discussed. The effect of nuclear and electronic energy loss on structural modifications of solids such as damage formation, phase transitions and amorphization is reviewed for insulators and semiconductors. Finally some selected applications of ion beams are given.

Download or read book The Electrical and Optical Properties Study of Copper Oxide Cu2O Thin Films written by Faridatul Syila Mak Muni @ Mat Muni and published by . This book was released on 2007 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the 2nd International Conference of Nanotechnology for Environmental Protection and Clean Energy Production written by Smail Hamamda and published by Springer Nature. This book was released on with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transparent Conductive Zinc Oxide written by Klaus Ellmer and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) belongs to the class of transparent conducting oxides that can be used as transparent electrodes in electronic devices or heated windows. In this book the material properties of, the deposition technologies for, and applications of zinc oxide in thin film solar cells are described in a comprehensive manner. Structural, morphological, optical and electronic properties of ZnO are treated in this review.

Download or read book Electronic and Optical Properties of Oxide Thin Films written by Steven Daniel Kirby and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Off-axis sputtering has been used to study two oxide thin film systems. The first study involved developing an epitaxially grown NiO/SrTiO3 heterostructure to be used for a negative index of refraction. The second used off-axis sputtering as a combinatorial approach to study the effects of doping and codoping of transparent conducting ZnO. A negative index of refraction should be possible by combining only intrinsic material resonances. We proposed that combining NiO, which has an antiferromagnetic resonance in the far infrared, and SrTiO3, which has a dielectric resonance in the far-infrared, can be used to achieve a negative refractive index of refraction in the far-infrared. These resonances can be shifted through changing temperature, doping, or through applying a magnetic field. A high quality epitaxially grown composite heterostructure and bulk ceramics have been fabricated. Preliminary measurements of the permeability and permittivity been taken for a bulk composite structure. The SrTiO3 ionic resonance can be seen in a reflection technique while the NiO antiferromagnetic resonance is easily seen in a transmission technique ZnO is a potential inexpensive replacement for indium tin oxide (ITO) as a high-end transparent conductor. However, ZnO has not replaced ITO in many applications such as flat-panel displays due to high resistivity and poor thermal stability. ZnO has been doped with many elements including Al, In and Ga. We proposed that codoping with both Al and In might result in size compensation which would lead to improved dopant solubility and therefore better electrical conductivity and stability. A high-throughput combinatorial approach was used to study codoping of ZnO with both Al and In. Measurement of the deposited composition spread suggests that codoping results in much improved conductivity. By adding 1% In to highly Al-doped ZnO (3-6%) the conductivity increases by an order of magnitude. Thermal annealing in a variety of atmospheres including air, vacuum and hydrogen results in some understanding of the difference in the two dopants. It was found that Al doping results in a higher carrier concentration than In doping, but any excess Al greatly decreases the mobility. In doping improves the mobility but with lower carrier concentrations. Calculations based on density functional theory support the experimental data, showing that Al is a shallower dopant than In. Unit cell volume comparisons between theory and experiment correspond well. The interplay between substitutional doping, oxygen vacancies, and possible adventitious H doping makes the doped ZnO system difficult to analyze definitively.

Download or read book A Fundamental Study of the Electrical and Optical Properties of Thin film R f sputter deposited Cu doped ZnTe written by Timothy Arthur Gessert and published by . This book was released on 1996 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the 4th International Symposium on Materials and Sustainable Development written by Abdelbaki Benmounah and published by Springer Nature. This book was released on 2020-10-24 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the 4th International Symposium on Materials and Sustainable Development ISMSD2019 (CIMDD2019), will include a 3-day Conference (12 - 14 November). Organized by the Research Unit: Materials, Processes and Environment and M'hamed Bougara University of Boumerdes (Algeria) in partnership with University of Reims - Champagne-Ardenne (France), this symposium follows the success of CIMDD 2013-2015-2017 and continues the traditions of the highly successful series of International Conferences on the materials, processes and Environment. The Symposium will provide a unique topical forum to share the latest results of the materials and sustainable development research in Algeria and worldwide.

Download or read book Optimisation of ZnO Thin Films written by Saurabh Nagar and published by Springer. This book was released on 2017-05-22 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph describes the different implantation mechanisms which can be used to achieve strong, reliable and stable p-type ZnO thin films. The results will prove useful in the field of optoelectronics in the UV region. This book will prove useful to research scholars and professionals working on doping and implantation of ZnO thin films and subsequently fabricating optoelectronic devices. The first chapter of the monograph emphasises the importance of ZnO in the field of optoelectronics for ultraviolet (UV) region and also discusses the material, electronic and optical properties of ZnO. The book then goes on to discuss the optimization of pulsed laser deposited (PLD) ZnO thin films in order to make successful p-type films. This can enable achievement of high optical output required for high-efficiency devices. The book also discusses a hydrogen implantation study on the optimized films to confirm whether the implantation leads to improvement in the optimized results.

Download or read book Processing and Characterization of P Type Doped Zinc Oxide Thin Films written by Michelle Anne Myers and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of zinc oxide (ZnO) for optoelectronic devices, including light emitting diodes, semiconductor lasers, and solar cells have not yet been realized due to the lack of high-quality p-type ZnO. In the research presented herein, pulsed laser deposition is employed to grow Ag-doped ZnO thin films, which are characterized in an attempt to understand the ability of Ag to act as a p-type dopant. By correlating the effects of the substrate temperature, oxygen pressure, and laser energy on the electrical and microstructural properties of Ag-doped ZnO films grown on c-cut sapphire substrates, p-type conductivity is achieved under elevated substrate temperatures. Characteristic stacking fault features have been continuously observed by transmission electron microscopy in all of the p-type films. Photoluminescence studies on n-type and p-type Ag-doped ZnO thin films demonstrate the role of stacking faults in determining the conductivity of the films. Exciton emission attributed to basal plane stacking faults suggests that the acceptor impurities are localized nearby the stacking faults in the n-type films. The photoluminescence investigation provides a correlation between microstructural characteristics and electrical properties of Ag- doped ZnO thin films; a link that enables further understanding of the doping nature of Ag impurities in ZnO. Under optimized deposition conditions, various substrates are investigated as potential candidates for ZnO thin film growth, including r -cut sapphire, quartz, and amorphous glass. Electrical results indicated that despite narrow conditions for obtaining p-type conductivity at a given substrate temperature, flexibility in substrate choice enables improved electrical properties. In parallel, N+-ion implantation at elevated temperatures is explored as an alternative approach to achieve p-type ZnO. The ion implantation fluence and temperature have been optimized to achieve p-type conductivity. Transmission electron microscopy reveals that characteristic stacking fault features are present throughout the p-type films, however in n-type N-doped films high-density defect clusters are observed. These results suggest that the temperature under which ion implantation is performed plays a critical role in determining the amount of dynamic defect re- combination that can take place, as well as defect cluster formation processes. Ion implantation at elevated temperatures is shown to be an effective method to introduce increased concentrations of p-type N dopants while reducing the amount of stable post-implantation disorder. Finally, the fabrication and properties of p-type Ag-doped ZnO/n-type ZnO and p-type N-doped ZnO/n-type ZnO thin film junctions were reported. For the N-doped sample, a rectifying behavior was observed in the I-V curve, consistent with N-doped ZnO being p-type and forming a p-n junction. The turn-on voltage of the device was -2.3 V under forward bias. The Ag-doped samples did not result in rectifying behavior as a result of conversion of the p-type layer to n-type behavior under the n- type layer deposition conditions. The systematic studies in this dissertation provide possible routes to grow p-type Ag-doped ZnO films and in-situ thermal activation of N-implanted dopant ions, to overcome the growth temperature limits, and to push one step closer to the future integration of ZnO-based devices. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/149354

Download or read book Study and Characterization of Alloys and Materials written by Mosbah Zidani and published by Trans Tech Publications Ltd. This book was released on 2019-09-24 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the field of engineering, the ability of a finished part to fulfil its function in the intended application is closely related to properties of materials for its production. The development of new high-technology structural materials, adapted to each new application, requires knowledge of base matter properties, the regularity of changes in its microstructure and properties during processing. This volume contains results of research of the microstructures of materials, methods by which the latter are worked, the effect of interactions at the interfaces for multi-materials and how structure determines their final properties.

Download or read book Zinc Oxide written by Hadis Morkoç and published by John Wiley & Sons. This book was released on 2008-12-03 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first systematic, authoritative and thorough treatment in one comprehensive volume presents the fundamentals and technologies of the topic, elucidating all aspects of ZnO materials and devices. Following an introduction, the authors look at the general properties of ZnO, as well as its growth, optical processes, doping and ZnO-based dilute magnetic semiconductors. Concluding sections treat bandgap engineering, processing and ZnO nanostructures and nanodevices. Of interest to device engineers, physicists, and semiconductor and solid state scientists in general.

Download or read book Studies on the Optical Properties of Al doped ZnO Thin Film Prepared by Magnetron Sputtering written by Khiaril Adzfar Ya and published by . This book was released on 2007 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Electrical and Optical Properties of Transparent Conducting Si doped ZnO Thin Films Grown by Pulsed Laser Deposition written by and published by . This book was released on 2009 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Properties of Copper Doped Zinc Sulphidenanoparticles written by Sakshi Sahare and published by LAP Lambert Academic Publishing. This book was released on 2014-03 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnology is the application of nanoscience to useful devices. Nanoscience can be explained as the study and manufacture of structure and devices with dimension about the size of few molecules. It is the branch of science which deals with the object with at least one dimension between one to one hundred nanometer in length, a size scale of atom molecules and super molecular structure. The nanometer sized semiconductor particles are representative of a different state of matter. This new class of material explores many properties such as size quantization, surface effect, lattice contraction, unusual fluorescence and enhanced oscillator strength, which are smaller than the diameter of their corresponding bulk excitons strongly depend on the size of the particles due to quantum confinement of the excited states. For nanoparticles, the size and surface effect are both importan. By controlling the size and surface effect, it is possible to design materials of required optical, magnetic, elastic and chemical properties. The combination of polymer with semiconducting nanoparticles allows the fabrication of thin film light emitting devices.