Download or read book Characterizing Recombination in Cu In Ga Se2 Solar Cells with Time Resolved Photoluminescence written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterizing Recombination in CdTe Solar Cells with Time resolved Photoluminescence written by and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-resolved photoluminescence (TRPL) computer simulations demonstrate that under certain experimental conditions it is possible to assess recombination in CdTe solar cells in spite of the junction. This is supported by experimental findings that open-circuit voltage (Voc) is dependent on lifetime in a manner consistent with device theory. Measurements on inverted structures show that the CdCl2 treatment significantly reduces recombination in the CdTe layer without S diffusion. However, S diffusion is required for lifetimes comparable to those observed in high-efficiency solar cells. The results indicate that substrate solar cells can be fabricated with recombination lifetimes similar to superstrate cells.

Download or read book Modeling and Simulation of Charge Carrier Recombination Dynamics in Cu In Ga Se2 Thin Film Solar Cells written by José Fabio López Salas and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar cells with thin Cu(In,Ga)(S,Se)2 absorber films are well established in the photovoltaics market. They offer an advantage over other thin film technologies thanks to their lower content of elements with high toxicity or low earth abundance like Cd and Te. One approach to further improve the quality of production of these cells is to develop a method of material quality assessment during production that is fast, contactless and non-destructive. Time-resolved photoluminescence (TRPL) measurements offer all these characteristics. This work aims to establish the requirements to extract meaningful information about charge carrier recombination dynamics and solar cell performance parameters from TRPL measurements. To achieve this goal experiments and simulations are carried out. The material parameters are extracted from experiments and then built into the simulation model. Results from experiments also serve as the basis to verify the validity of this model. Parameter variations within the simulations function as one of the main methods in this work to gain deeper physical insight into the processes taking place during TRPL measurements. engl.

Download or read book Advanced Characterization Techniques for Thin Film Solar Cells written by Daniel Abou-Ras and published by John Wiley & Sons. This book was released on 2016-07-13 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on advanced characterization methods for thin-film solar cells that have proven their relevance both for academic and corporate photovoltaic research and development. After an introduction to thin-film photovoltaics, highly experienced experts report on device and materials characterization methods such as electroluminescence analysis, capacitance spectroscopy, and various microscopy methods. In the final part of the book simulation techniques are presented which are used for ab-initio calculations of relevant semiconductors and for device simulations in 1D, 2D and 3D. Building on a proven concept, this new edition also covers thermography, transient optoelectronic methods, and absorption and photocurrent spectroscopy.

Download or read book Micro and Macroscopic Characterization of Recombination Losses in High Efficiency Cu In Ga Se2 Thin Film Solar Cells written by Benjamin Bissig and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air light Exposure of Cu In Ga Se2 Thin Film Absorber Layers and the Effects on Complete Solar Cells written by Torsten Hölscher and published by . This book was released on 2022* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis deals with the modification of the Cu(In,Ga)Se2 surface, caused by illumination in ambient air. After the specifically exposure of the bare CIGSe surface to air and light (air-light exposure = ALE), the absorber layers have been investigated with time-resolved photoluminescence (TRPL) and X-ray photoelectron spectroscopy (XPS). Solar cells with ALE absorbers have been diagnosed to be limited by recombination at the Absorber/Buffer interface, using voltage dependent admittance spectroscopy and measuring the open circuit voltage as a function of temperature VOC(T) as well as a function of time VOC(t).

Download or read book Electrical Characterisation Modelling and Simulation of Cu In Ga Se S 2 Solar Cells written by Tetiana Lavrenko and published by . This book was released on 2019* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIGS solar cells, sequential growth process, sulfur-gradient, gallium-gradient, bandgap grading, reciprocity relation, admittance measurements, time-resolved photoluminescence.

Download or read book Characterization of Alkaline doped Wide Bandgap Chalcopyrite Cu In Ga Se2 Thin Films and Solar Cells written by Setareh Zahedi-Azad and published by . This book was released on 2020* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin-film solar cells, Cu(In,Ga)Se2, recombination, open-circuit voltage, efficiency, simulation.

Download or read book Interface Modification by Ion Implantation and Optical Characterization of High efficiency Cu In Ga Se2 Solar Cells written by Jakob Haarstrich and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three different issues are discussed in this thesis, which aim for a deeper understanding of Cu(In,Ga)Se2 material properties and solar cell functionality: (1)Near-surface ion implantation in Cu(In,Ga)Se2 absorber layers is studied as a method for the fabrication of buffer-free solar cells. Simulations show the beneficial effect of an n-type surface layer (buried junction). To obtain an inversion by means of ion implantation, an annealing procedure is developed that avoids annealing-induced degradation of the cell, minimizes the diffusion of the ions, and recovers the implantation damage. Buffer-free solar cells made from implanted absorbers show strongly improved diode characteristics comparable to the ones of cells with a CdS buffer and a maximum efficiency of 10.2% (11.2% active area). (2)A model is developed for the application of luminescence techniques on band-gap graded semiconductor thin-films. Several DA-emissions are detected in the cathodoluminescence (CL) and photoluminescence (PL) spectra of Ga-graded in Cu(In,Ga)Se2 and related to the local Ga-contents in the layer. The depth-distribution of the luminescence signal is correlated to the band-gap profile. Drift of excited charge carriers towards the band-gap minimum is caused by the grading-induced quasi-electric field, which must be considered when explaining the spectra obtained in plan-view measurements. Monochromatic CL imaging on cross-sections is capable to determine the minority carrier mobility.

Download or read book Theory And Methods Of Photovoltaic Material Characterization Optical And Electrical Measurement Techniques written by Ahrenkiel Richard K and published by World Scientific. This book was released on 2019-02-27 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an extensive review of the theory of transport and recombination properties in semiconductors. The emphasis is placed on electrical and optical techniques. There is a presentation of the latest experimental and theoretical techniques used to analyze minority-carrier lifetime. The relevant hardware and instrumentation are described. The newest techniques of lifetime mapping are presented. The issues are discussed relating to effects that mask carrier lifetime in certain device structures. The discrepancy between photoconductive and photoluminescence measurement results are analyzed.

Download or read book Development Characterization and Modeling of CuGaSe2 Cu In Ga Se2 Thin film Tandem Solar Cells written by Jiyon Song and published by . This book was released on 2006 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On Generation and Recombination in Cu In Ga Se2 Thin film Solar Cells written by and published by . This book was released on 2005 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photoluminescence Study of Cu In Ga Se2 and Cu2ZnSnSe4 Used for Thin Film Solar Cells written by Ekaterina Skidchenko and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The composition of the CIGSe and CZTSe samples was investigated using energy dispersive x-ray (EDX) analysis and wavelength dispersive x-ray (WDX) technique, respectively. According to the microscopy results, calculated cation ratios proved the nature of established recombinations.

Download or read book Preparation and Characterization of Heteroepitaxial CuInxSey Layers and Cu In Ga Se2 Substrate Solar Cells written by Martin Krejci and published by . This book was released on 1999 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chalcogenide Photovoltaics written by Roland Scheer and published by John Wiley & Sons. This book was released on 2011-03-31 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first comprehensive description of the most important material properties and device aspects closes the gap between general books on solar cells and journal articles on chalcogenide-based photovoltaics. Written by two very renowned authors with years of practical experience in the field, the book covers II-VI and I-III-VI2 materials as well as energy conversion at heterojunctions. It also discusses the latest semiconductor heterojunction models and presents modern analysis concepts. Thin film technology is explained with an emphasis on current and future techniques for mass production, and the book closes with a compendium of failure analysis in photovoltaic thin film modules. With its overview of the semiconductor physics and technology needed, this practical book is ideal for students, researchers, and manufacturers, as well as for the growing number of engineers and researchers working in companies and institutes on chalcogenide photovoltaics.

Download or read book Copper Zinc Tin Sulfide Based Thin Film Solar Cells written by Kentaro Ito and published by John Wiley & Sons. This book was released on 2014-12-11 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with an overview and historical background of Copper Zinc Tin Sulphide (CZTS) technology, subsequent chapters cover properties of CZTS thin films, different preparation methods of CZTS thin films, a comparative study of CZTS and CIGS solar cell, computational approach, and future applications of CZTS thin film solar modules to both ground-mount and rooftop installation. The semiconducting compound (CZTS) is made up earth-abundant, low-cost and non-toxic elements, which make it an ideal candidate to replace Cu(In,Ga)Se2 (CIGS) and CdTe solar cells which face material scarcity and toxicity issues. The device performance of CZTS-based thin film solar cells has been steadily improving over the past 20 years, and they have now reached near commercial efficiency levels (10%). These achievements prove that CZTS-based solar cells have the potential to be used for large-scale deployment of photovoltaics. With contributions from leading researchers from academia and industry, many of these authors have contributed to the improvement of its efficiency, and have rich experience in preparing a variety of semiconducting thin films for solar cells.

Download or read book Molecular Beam Deposition and Characterization of Wide band gap Cu In Ga se2 for Thin Film Solar Cells written by Panita Chinvetkitvanich and published by . This book was released on 2006 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mo/ Cu(In, Ga)Se2/CdS/ZnO thin film solar cells were fabricated and studied on their current transport mechanism. The current-voltage characteristics were measured in the dark and illuminated, at room temperature as well as variety of temperature. The dark and illuminated I-V characteristics were deduced for their diode ideality factor (A), series resistace (R2) and the reverse saturation current density (Jo) which are related to current transport mechanism through the junction. The I-V characteristic curves at room temperature indicate that current transport process is controlled by the Shockley-Read-Hall (SRH) recombination in the space charge region. The analysis of temperature dependent current-voltage I(V, T) measurement indicates that the tunneling contributes to the recombination in the space charge region at low temperature. The studies of the effect of impurity concentration in the CdS buffer layer and the effect of illumination intensity on the I-V characteristics were analyzed and used to draw a possible energy band diagram of the device. It is also used to explain the current transport mechanism at junction.