Download or read book Loss Analysis of Crystalline Silicon Solar Cells using Photoconductance and Quantum Efficiency Measurements written by and published by Cuvillier Verlag. This book was released on 2003-08-19 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elimination of Potential induced Degradation for Crystalline Silicon Solar Cells written by Jaewon Oh and published by . This book was released on 2016 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Potential-Induced Degradation (PID) is an extremely serious photovoltaic (PV) durability issue significantly observed in crystalline silicon PV modules due to its rapid power degradation, particularly when compared to other PV degradation modes. The focus of this dissertation is to understand PID mechanisms and to develop PID-free cells and modules. PID-affected modules have been claimed to be fully recovered by high temperature and reverse potential treatments. However, the results obtained in this work indicate that the near-full recovery of efficiency can be achieved only at high irradiance conditions, but the full recovery of efficiency at low irradiance levels, of shunt resistance, and of quantum efficiency (QE) at short wavelengths could not be achieved. The QE loss observed at short wavelengths was modeled by changing the front surface recombination velocity. The QE scaling error due to a measurement on a PID shunted cell was addressed by developing a very low input impedance accessory applicable to an existing QE system. The impacts of silicon nitride (SiNx) anti-reflection coating (ARC) refractive index (RI) and emitter sheet resistance on PID are presented. Low RI ARC cells (1.87) were observed to be PID-susceptible whereas high RI ARC cells (2.05) were determined to be PID-resistant using a method employing high dose corona charging followed by time-resolved measurement of surface voltage. It has been demonstrated that the PID could be prevented by deploying an emitter having a low sheet resistance (~ 60 /sq) even if a PID-susceptible ARC is used in a cell. Secondary ion mass spectroscopy (SIMS) results suggest that a high phosphorous emitter layer hinders sodium transport, which is responsible for the PID. Cells can be screened for PID susceptibility by illuminated lock-in thermography (ILIT) during the cell fabrication process, and the sample structure for this can advantageously be simplified as long as the sample has the SiNx ARC and an aluminum back surface field. Finally, this dissertation presents a prospective method for eliminating or minimizing the PID issue either in the factory during manufacturing or in the field after system installation. The method uses commercially available, thin, and flexible Corning® Willow® Glass sheets or strips on the PV module glass superstrates, disrupting the current leakage path from the cells to the grounded frame.
Download or read book Silicon Materials Task of the Low cost Solar Array Project phase IV written by R. H. Hopkins and published by . This book was released on 1981 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Cells and Modules written by Arvind Shah and published by Springer Nature. This book was released on 2020-07-16 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive introduction to the field of photovoltaic (PV) solar cells and modules. In thirteen chapters, it addresses a wide range of topics including the spectrum of light received by PV devices, the basic functioning of a solar cell, and the physical factors limiting the efficiency of solar cells. It places particular emphasis on crystalline silicon solar cells and modules, which constitute today more than 90 % of all modules sold worldwide. Describing in great detail both the manufacturing process and resulting module performance, the book also touches on the newest developments in this sector, such as Tunnel Oxide Passivated Contact (TOPCON) and heterojunction modules, while dedicating a major chapter to general questions of module design and fabrication. Overall, it presents the essential theoretical and practical concepts of PV solar cells and modules in an easy-to-understand manner and discusses current challenges facing the global research and development community.
Download or read book Materials for Solar Cell Technologies I written by Inamuddin and published by Materials Research Forum LLC. This book was released on 2021-01-20 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews recent research and new trends in the area of solar cell materials. Topics include fabrication methods, solar cell design, energy efficiency and commercialization of next-generation materials. Special focus is placed on graphene and carbon nanomaterials, graphene in dye-sensitized solar cells, perovskite solar cells and organic photovoltaic cells, as well as on transparent conducting electrode (TCE) materials, hollow nanostructured photoelectrodes, monocrystalline silicon solar cells (MSSC) and BHJ organic solar cells. Also discussed is the use of graphene, sulfides, and metal nanoparticle-based absorber materials. Keywords: Solar Cell, Graphene Nanomaterials, Carbon Nanomaterials, Graphene in Dye-sensitized Solar Cells, Perovskite Solar Cells, Organic Photovoltaic Cells, Transparent Conducting Electrode (TCE) Materials, Hollow Nanostructured Photoelectrodes, Monocrystalline Silicon Solar Cells (MSSC), BHJ Organic Solar Cells, Electrochemical Sensing, Low Band-Gap Materials, Absorber Materials for Solar Cells.
Download or read book Analysis and Simulation of Crystalline Silicon Solar Cells written by Marc Rüdiger and published by . This book was released on 2014-03 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crystalline Silicon Solar Cells written by Adolf Goetzberger and published by . This book was released on 1998 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Addressing Optical Recombination and Resistive Losses in Crystalline Silicon Solar Cells written by Thomas Gerald Allen and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of any photovoltaic device is determined by its ability to mitigate optical, recombination, and resistive energy losses. This thesis investigates new materials and nascent technologies to address these energy loss mechanisms in crystalline silicon solar cells. Optical losses, specifically the suppression of energy losses resulting from front surface reflection, are first analysed. The use of reactive ion etched black silicon texturing, a nano-scale surface texture, is assessed with respect to the two conventional texturing processes: isotexture and random pyramids. While nano-scale surface textures offer a means of almost eliminating front surface reflection, relatively poor internal optical properties (i.e. light trapping) compared to both conventional textures can compromise any optical gains realised on the front surface. It is also shown that enhanced recombination losses remains a barrier to the application of black silicon texturing to further improve high performance devices, though this will likely have less of an impact on multi-crystalline silicon cells where bulk recombination dominates.The suppression of recombination losses at surface defects by gallium oxide (Ga2O3), an alternative to aluminium oxide (Al2O3), is also investigated. It is demonstrated that, as in Al2O3, thin films of amorphous Ga2O3 can passivate surface defects through a direct reduction of recombination active defects and via the establishment of a high negative charge density. Further investigations demonstrate that Ga2O3 is applicable to random pyramid surfaces textures, and is compatible with plasma enhanced chemical vapour deposited silicon nitride (SiNx) capping for anti-reflection purposes. Indeed, the Ga2O3 / SiNx stack is shown to result in enhanced thermal stability and surface passivation properties comparable to state-of-the-art Al2O3 films. In addition, it is also shown that Ga2O3 can act as a Ga source in a laser doping process, as demonstrated by a proof-of-concept p-type laser doped partial rear contact solar cell with an efficiency of 19.2%. Finally, the resistive losses associated with metal / silicon contacts are addressed. It is demonstrated that a significant asymmetry in the work function of the electron and hole contact materials is sufficient to induce carrier selectivity without the need for heavy doping. This had recently been demonstrated for hole contacts with the high work function material molybdenum oxide. In this thesis specific attention is given to finding a suitable low work function material for the electron contact. Calcium, a common low work function electrode in organic electronic devices, is shown to act as a low resistance Ohmic contact to crystalline silicon without the need for heavy doping. Fabrication of n-type solar cells with partial rear calcium contacts resulted in a device efficiency of 20.3%, limited largely by recombination at the Ca / Si interface. This limitation to device efficiency is shown to be partially alleviated by the application of a passivating titania (TiOx) interlayer into the cell structure, resulting in an increase in device efficiency to 21.8% -- the highest reported efficiency for a TiOx-based heterojunction solar cell to date.
Download or read book Microcrystalline Silicon Solar Cells Theory and Diagnostic Tools written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple theoretical model for pin/nip-type muc-Si:H solar cells is presented. It is based on a superposition of a drift-dominated collection model and of the classical drift-diffusion transport model of the pn-diode. The model is the basis for a solar cell equivalent circuit, identical to the one introduced by Merten et al., for amorphous cells. The equivalent circuit serves as framework for the diagnosis of faulty solar cells, by selected experimental tools, such as: J(V) curves, Quantum efficiency (QE) curves, Raman spectroscopy, Fourier-Transform Photo Spectroscopy (FTPS), Variable Intensity Measurements (VIM). The main parameter that characterizes solar cell "quality" is the fill factor (FF). For best cells FF is over 75%. FF can be reduced by (1) collection problems (characterized by a drop in the collection voltage Vcoll); (2) shunts (characterized by low shunt resistance Rshunt); (3) excessive series resistance. Thanks to VIM analysis, it is possible to discriminate experimentally between these 3 types of deficiencies. It is also possible to measure Vcoll very easily and link it to fill factor reduction DeltaFF. Selected examples of solar cell series and case studies of defective and degraded cells are given.
Download or read book Solar Energy Capture Materials written by Elizabeth A Gibson and published by Royal Society of Chemistry. This book was released on 2019-08-19 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy is an important area of contemporary research, with clear societal benefits. It is a fast-developing and application-driven research area, with chemistry leading the discovery of new solids, which are then studied by physicists and materials scientists. Solar Energy Capture Materials introduces a range of the different inorganic materials used, with an emphasis on how solid-state chemistry allows development of new functional solids for energy applications. Dedicated chapters cover silicon-based photovoltaic devices, compound semiconductor-based solar cells, dye-sensitized solar cells (DSC), solution processed solar cells and emerging materials. Edited and written by world-renowned scientists, this book will provide a comprehensive introduction for advanced undergraduates, postgraduates and researchers wishing to learn about the topic.
Download or read book Sustainable Developments by Artificial Intelligence and Machine Learning for Renewable Energies written by Krishna Kumar and published by Academic Press. This book was released on 2022-03-18 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Developments by Artificial Intelligence and Machine Learning for Renewable Energies analyzes the changes in this energy generation shift, including issues of grid stability with variability in renewable energy vs. traditional baseload energy generation. Providing solutions to current critical environmental, economic and social issues, this book comprises various complex nonlinear interactions among different parameters to drive the integration of renewable energy into the grid. It considers how artificial intelligence and machine learning techniques are being developed to produce more reliable energy generation to optimize system performance and provide sustainable development. As the use of artificial intelligence to revolutionize the energy market and harness the potential of renewable energy is essential, this reference provides practical guidance on the application of renewable energy with AI, along with machine learning techniques and capabilities in design, modeling and for forecasting performance predictions for the optimization of renewable energy systems. It is targeted at researchers, academicians and industry professionals working in the field of renewable energy, AI, machine learning, grid Stability and energy generation. Covers the best-performing methods and approaches for designing renewable energy systems with AI integration in a real-time environment Gives advanced techniques for monitoring current technologies and how to efficiently utilize the energy grid spectrum Addresses the advanced field of renewable generation, from research, impact and idea development of new applications
Download or read book Thin Film Polycrystalline Silicon Solar Cells written by Kalluri Ramalingeswara Sarma and published by . This book was released on 1980 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Efficiency limiting Recombination Mechanisms in High quality Crystalline Silicon for Solar Cells written by Simone Bernardini and published by . This book was released on 2018 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent technology advancements in photovoltaics have enabled crystalline silicon (c-Si) solar cells to establish outstanding photoconversion efficiency records. Remarkable progresses in research and development have been made both on the silicon feedstock quality as well as the technology required for surface passivation, the two dominant sources of performance loss via recombination of photo-generated charge carriers within advanced solar cell architectures. As these two aspects of the solar cell framework improve, the need for a thorough analysis of their respective contribution under varying operation conditions has emerged along with challenges related to the lack of sensitivity of available characterization techniques. The main objective of my thesis work has been to establish a deep understanding of both "intrinsic" and "extrinsic" recombination processes that govern performance in high-quality silicon absorbers. By studying each recombination mechanism as a function of illumination and temperature, I strive to identify the lifetime limiting defects and propose a path to engineer the ultimate silicon solar cell. This dissertation presents a detailed description of the experimental procedure required to deconvolute surface recombination contributions from bulk recombination contributions when performing lifetime spectroscopy analysis. This work proves that temperature- and injection-dependent lifetime spectroscopy (TIDLS) sensitivity can be extended to impurities concentrations down to 109 cm-3, orders of magnitude below any other characterization technique available today. A new method for the analysis of TIDLS data denominated Defect Parameters Contour Mapping (DPCM) is presented with the aim of providing a visual and intuitive tool to identify the lifetime limiting impurities in silicon material. Surface recombination velocity results are modelled by applying appropriate approaches from literature to our experimentally evaluated data, demonstrating for the first time their capability to interpret temperature-dependent data. In this way, several new results are obtained which solve long disputed aspects of surface passivation mechanisms. Finally, we experimentally evaluate the temperature-dependence of Auger lifetime and its impact on a theoretical intrinsically limited solar cell. These results decisively point to the need for a new Auger lifetime parameterization accounting for its temperature-dependence, which would in turn help understand the ultimate theoretical efficiency limit for a solar cell under real operation conditions.
Download or read book Proceedings of the National Workshop on Low Cost Polycrystalline Silicon Solar Cells May 18 19 1976 Southern Methodist University Dallas Texas written by Ting L. Chu and published by . This book was released on 1976 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Cells written by Sandeep Arya and published by Springer Nature. This book was released on 2023-12-23 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights developments in the field of solar cells. The chapters in this book address a wide range of topics including the spectrum of light received by solar cell devices, the basic functioning of a solar cell, and the evolution of solar cell technology during the last 50 years. It places particular emphasis on silicon solar cells, CIGS-based solar cells, organic solar cells, perovskite solar cells and hybrid solar cells. The book describes in detail the fabrication processes employed for different categories of solar cells. It also provides the characterization techniques utilized in this sector to evaluate the performance of solar cells and the scope of this domain in the future. Overall, it presents the essential theoretical and practical concepts of solar cells in an easy-to-understand manner.
Download or read book Amorphous and Microcrystalline Silicon Applied in Very Thin Tandem Solar Cells written by Sandra Schicho and published by Forschungszentrum Jülich. This book was released on 2011 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Radiation Damage in Multi junction Solar Cells Using Light biased Current Measurements written by Aaron Korostyshevsky and published by . This book was released on 2008 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Triple-junction amorphous silicon solar cells have been characterized using two techniques to identify the current-limiting component cell after a variety of radiation exposure experiments. The first technique is calculation of integrated current from quantum efficiency (QE) data, which is commonly accepted by the photovoltaics community for predicting the current output of a solar cell. This study shows that significant sources of uncertainty make quantum efficiency measurements unreliable in low quality multi-junction devices such as those that have been severely degraded by particle radiation.An alternate method is examined whereby a solar cell is illuminated by simulated air-mass zero (AM0) light and secondary filtered lamps are used to boost the current in two of the three component cells. Thorough characterization of the test condition shows that the targeted component cell limits the current of the device as a result of the boost light, making the current measured from the device under test represent the current output of the desired component cell. This method is henceforth called light-biased current measurement (LBCM). An additional benefit of the light-biased current measurement is the significantly reduced time required to make a measurement compared to quantum efficiency measurements.Successful repeatability and reproducibility experiments further validate this test method. As shown during reproducibility testing, one of the two solar simulators used introduces an expected increase in the measurement uncertainty due its unstable intensity output. The increase in variance of the data is well correlated to the estimated measurement uncertainty.
