Download or read book Characterization and Optimization of Silicon Solar Cells written by Min Koo Han and published by . This book was released on 1982 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization and Optimization of Laser doped Selective Emitters for Applications in Silicon Solar Cells written by Jillian J. Woolridge and published by . This book was released on 2011 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Silicon Heterojunction Solar Cell Characterization and Optimization Using In Situ and Ex Situ Spectroscopic Ellipsometry Presentation written by M. Page and published by . This book was released on 2006 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The summary of this report is that: in situ SE gives insight into growth mechanisms and accurate layer thickness; (2) ex situ SE measures completed device structures to determine integrated optical properties; and (3) the combination of in situ and ex situ SE provides a powerful method for pinpointing the effects of processing changes in actual SHJ devices and guiding optimization.

Download or read book Silicon Heterojunction Solar Cell Characterization and Optimization Using In Situ and Ex Situ Spectroscopic Ellipsometry written by and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book written by and published by . This book was released on 1943 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization and Optimization of Silicon Nanowires for Biosensing and Photovoltaic Applications written by Dong Rip Kim and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One-dimensional nanowires, due to their excellent electrical, optical, and chemical properties, and large surface to volume ratios, offer the promise of producing revolutionary advances in many areas of technology. This study investigates two application examples of Si nanowires (SiNWs) in the areas of biosensing and solar cells, respectively. First, SiNWs have been highlighted as real-time, label-free, multiplexing, and femtomolar level accuracy biosensors. However, SiNWs are frequently placed on the bottom wall of a microfluidic channel in the sensing process where the convection velocity is almost zero such that the performance of SiNW biosensors is restrained by the analyte transport. Moreover, although the sensing is carried out in a microfluidic environment where the charged analytes coexist with charged ions of the electrolytic solution, efforts are lacking in understanding the effects of charged ions in the electrolytic solution on the sensing performance of SiNWs. Herein, this study focuses on the characterization and optimization of microfluidic sensing environment for SiNW biosensors in terms of the response time, sensitivity, and selectivity. Our numerical studies suggest that the diffusive analyte transport currently limits the response time of SiNW biosensors. Through microfluidic optimization, about 17.4 times faster response time and doubled sensitivity are achievable in SiNW biosensing. In addition, our experimental investigation shows that SiNWs can also detect ionic movements and distributions other than targeted species inside the microfluidic channel, which can affect the selectivity of SiNW biosensors and lead to false signals. Second, vertically aligned radial junction Si wire array solar cells can offer the opportunity to use lower grade material to produce efficient solar cells, due to the decoupling of light absorption and charge-carrier collection directions, and enhanced light trapping. Nevertheless, radial junction Si wire array solar cells still face critical challenges such as large junction and surface recombination losses of photogenerated charge carriers due to their inherent large surface area, which is one of the primary reasons responsible for the gap between reported experimental efficiencies (typically below 10%) and the estimated 17% theoretical efficiency. Therefore, we experimentally investigated junction and surface passivation strategies to effectively suppress large junction and surface recombinations of vertically aligned radial junction Si wire array solar cells. The inclusion of intrinsic polycrystalline Si layer between the p-n junction layers increases the efficiency by about 30% by reducing the dark current, and the top amorphous silicon nitride layer improves the efficiency by about 20% due to its combined surface passivation and antireflection effects. With the combination of both passivation layers, the maximum efficiency of our solar cells is improved from 7.2% to 11.0% under AM 1.5G illumination.

Download or read book The Analysis and Optimization of a Spherical Silicon Solar Cell written by William Randall McKee and published by . This book was released on 1976 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimization and Characterization of Low cost Substrates for III V Photovoltaics written by Elisabeth L. McClure and published by . This book was released on 2020 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The highest achieved photovoltaic power conversion efficiency (approximately 47% under concentration) is available from III-V multijunction solar cells made from subcells of descending bandgap that optimize light collection from the solar spectrum. Unfortunately, both III-V multijunction and single-junction solar cells are expensive, limiting their use to niche concentration or space power applications and precluding their competitiveness in the terrestrial flat-plate market. The majority of the III-V solar cell cost is attributed to the thick, monocrystalline substrates that are used as a platform for epitaxial growth, and to the throughput, precursors, and utilization of those precursors associated with traditional growth reactors. Significant cost reduction to approach $1/W for total photovoltaic system cost is imperative to realize III-V solar cells that are cost-competitive with incumbent silicon solar cells, and can include techniques to develop inexpensive substrates directly; enable multiple reuses of a pristine, expensive substrate without the need for polishing; and enhance the throughput by increasing the semiconductor growth rate during epitaxy. This dissertation explores two main techniques to achieve low-cost substrates for III-V photovoltaics: aluminum-induced crystallization to create polycrystalline germanium thin films, and remote epitaxy through graphene to enable monocrystalline substrate reuse without polishing. This dissertation also demonstrates record III-V growth rates exceeding 0.5 mm/h using a potentially lower-cost III-V growth technique, which would increase throughput in production reactors. The ability to reduce the costs associated with both substrates and epitaxy will be imperative to decreasing the total system cost of III-V PV."--Abstract.

Download or read book Silicon Heterojunction Solar Cells written by W.R. Fahrner and published by Trans Tech Publications Ltd. This book was released on 2006-08-15 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world of today must face up to two contradictory energy problems: on the one hand, there is the sharply growing consumer demand in countries such as China and India. On the other hand, natural resources are dwindling. Moreover, many of those countries which still possess substantial gas and oil supplies are politically unstable. As a result, renewable natural energy sources have received great attention. Among these, solar-cell technology is one of the most promising candidates. However, there still remains the problem of the manufacturing costs of such cells. Many attempts have been made to reduce the production costs of “conventional” solar cells (manufactured from monocrystalline silicon using diffusion methods) by instead using cheaper grades of silicon, and simpler pn-junction fabrication. That is the ‘hero’ of this book; the heterojunction solar cell.

Download or read book Characterization and Optimization of Amorphous and Microcrystalline Silicon germanium Alloys as Absorber Layers for Thin film Solar Cell Applications written by 許宏榮 and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical and Electrical Optimization by Advanced Characterization of Monolithic Perovskite silicon Tandem Solar Cells written by Eike Köhnen and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geometric Characterization and Optimization of 3D Organic Flexible Solar Cells written by Ashish K. Gaikwad and published by . This book was released on 2011 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solar Energy Update written by and published by . This book was released on 1984 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Silicon Solar Cells written by Shadia Ikhmayies and published by Springer. This book was released on 2018-01-10 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a review of all types of silicon solar cells. The scope includes monocrocrystalline Si solar cells, polycrystalline and amorphous thin-film silicon solar cells, and tandem solar cells. Production, treatment and development of these devices are reviewed. Limitations of these devices, design optimization, testing and fabrication methods are covered. In addition, current status and future prospects for the further development of silicon solar cells are addressed. Special emphasis is given to methods of attaining high efficiency and thereby cost-effective solar power. The aim of the book is to provide the reader with a complete overview about the recent advances in the structure and technology of all generations of silicon solar cells.

Download or read book High Efficiency Amorphous Silicon Thin Film Solar Cells written by Nowshad Amin and published by LAP Lambert Academic Publishing. This book was released on 2014-06-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conversion efficiency of a solar cell can substantially be increased by improved material properties and associated designs. In this book, it has been shown that how the parametric optimization can lead to successful design of amorphous silicon thin film solar cells by using a software called AMPS-1D (Analysis of Microelectronic and Photonic Structures) prior to fabrication. Solar cells of single junction based on hydrogenated amorphous (a-Si: H) have been analyzed by using AMPS-1D simulator. The efficiency of single junction a-Si: H can be achieved as high as over 19% after parametric optimization in the simulation. Therefore, the numerically designed and optimized a-SiC: H/a-SiC: H-buffer/a-Si: H/a-Si: H solar cells have been fabricated by using PECVD (plasma enhanced chemical vapor deposition) where the best initial conversion efficiency of 10.02% has been achieved (Voc= 0.88 V, Jsc= 15.57 mA/cm2 and FF= 0.73) as one of the highest recorded efficiency to

Download or read book High Efficiency Crystalline Silicon Solar Cells written by Eun-Chel Cho and published by MDPI. This book was released on 2021-01-06 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is composed of 6 papers. The first paper reports a novel technique for the selective emitter formation by controlling the surface morphology of Si wafers. Selective emitter (SE) technology has attracted renewed attention in the Si solar cell industry to achieve an improved conversion efficiency of passivated-emitter rear-contact (PERC) cells. In the second paper, the temperature dependence of the parameters was compared through the PERC of the industrial-scale solar cells. As a result of their analysis, PERC cells showed different temperature dependence for the fill factor loss as temperatures rose. The third paper reports the effects of carrier selective front contact layer and defect state of hydrogenated amorphous silicon passivation layer/n-type crystalline silicon interface. The results demonstrated the effects of band offset determined by band bending at the interface of the passivation layer and carrier selective front contact layer. In addition, the nc-SiOx: H CSFC layer not only reduces parasitic absorption loss but also has a tunneling effect and field-effect passivation. The fourth paper reports excimer laser annealing of hydrogenated amorphous silicon film for TOPCon solar cell application. This paper analyzes the crystallization of a-Si:H via excimer laser annealing (ELA) and compared this process with conventional thermal annealing. The fifth paper reports the contact mechanism between Ag–Al and Si and the change in contact resistance (Rc) by varying the firing profile. Rc was measured by varying the belt speed and peak temperature of the fast-firing furnace. The sixth paper reports a silicon tandem heterojunction solar cell based on a ZnO/Cu2O subcell and a c-Si bottom subcell using electro-optical numerical modeling. The buffer layer affinity and mobility together with a low conduction band offset for the heterojunction are discussed, as well as spectral properties of the device model.

Download or read book Performance Optimization of Cu In1 x Gax Se1 y Sy 2 Thin film Solar Cells by Characterization and Modelling of Temperature and Low light Behavior written by Hamsa Ahmed and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the impact of structural variations of CIGS solar cells on their temperature coefficients, their stability, and their low light performance is studied. The layer modifications implemented for this study include different buffer, window layers and back contacts materials, and different double graded absorbers with change in their thickness and sodium post deposition treatment. It was demonstrated that the absorber layer exhibits the largest influence on the temperature dependence of the power output amongst all modified layers of the structure. The buffer and the absorber elemental composition showed to play an important role in the elemental interdiffusion and hence led to the creation of amphoteric defects that are light and temperature sensitive. Studies on the impact of different solar cell structures on the shift of the dominant recombination region at different light intensities were also performed.