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Book Interdigitated Back Contact Silicon Solar Cell Analysis and Design Recommendations for Space Use

Download or read book Interdigitated Back Contact Silicon Solar Cell Analysis and Design Recommendations for Space Use written by D. C. Marvin and published by . This book was released on 1989 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Interdigitated Back Contact (IBC) solar cell is a relatively new design which has shown unprecedentedly high efficiencies. Silicon Interdigitated Back Contact cells have been fabricated that show greater than 25% efficiency at 100 suns Air Mass 1.5. This is far superior to conventional silicon concentrator cells which are approximately 18% efficient. The purpose of this report is to describe briefly the differences between this technology and conventional cells, demonstrate a near optimum design achieved by two-dimensional numerical simulation, and assess the utility of these cells for space application. The end of life (EOL) performance of this cell design in the radiation environment of space is a critical issue since the high efficiency of the design is predicated on the use of very high quality, long-diffusion length silicon. The radiation-induced degradation of this material is expected to lead to severe efficiency losses. The optimization of cell design to minimize these losses was carried out using a modified version of the 2-dimensional PISCES semiconductor simulator. The final designs presented here show that the performance of IBC cells in space can significantly exceed that of conventional cells. PISCES Simulator, Electric power production, Power supplies, Solar cells, Semiconductors. (jg).

Book Annual Report on Interdigitated Back Contact Solar Cells

Download or read book Annual Report on Interdigitated Back Contact Solar Cells written by Mark Lundstrom and published by . This book was released on 1980 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Interdigitated Back Contact Silicon Heterojunction Solar Cells

Download or read book Interdigitated Back Contact Silicon Heterojunction Solar Cells written by John Allen and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Interdigitated back contact silicon hetero-junction (IBC-SHJ) solar cells using a-Si emitter and contact layers show significant potential advantages over standard hetero-junction devices: higher short-circuit current (Jsc) since there is no grid shading and higher open-circuit voltage (Voc) due to better surface passivation. However, they often suffer from low fill factor (FF). IBC-SHJ processing steps include two separate photoresist masks for doped amorphous silicon depositions, and all amorphous layers are deposited using Plasma Enhanced Chemical Vapor Deposition (PECVD). The thicknesses of the front surface layers are optimized so that reflection and absorption are minimized. Measurement techniques, such as current-voltage, reflection, and quantum efficiency, were used to characterize the experimental devices. These techniques were also investigated in simulations to match modeled data to experimental results. Using two-dimensional simulations to model IBC-SHJ devices on Float Zone (FZ) n-Si, we found that the FF was nearly independent of the defect concentrations in contact and passivating i-layers but strongly dependent on the defects in emitter and the band gap in the rear i-layer. Voc and Jsc were nearly independent of defects in either doped layer. In a-Si doped layers it is well known that the number of defects increase with doping. We find that the FF is sensitive to either mid-gap or band tail states and that S-shaped JV curves responsible for low FF can be eliminated by a decrease in p-layer mid-gap or band tail defect levels, or by decreasing the rear i-layer's band gap. The insensitivity of FF to defects in the n-layer or in the i-layer suggests the FF is dominated by minority carrier injection/collection from the p-type emitter layer. The dependence of FF on the rear i-layer band gap suggests that increasing the offset in the valence band impedes minority carrier collection. Rear-surface geometry, wafer resistivity, and wafer lifetime and thickness were also investigated in simulations, and their results are shown. With the advancement of IBC-SHJ technology, new device structures, such as larger cells with more interdigitated fingers, will be fabricated and simulated.

Book Interdigitated Back Contact Silicon Solar Cells

Download or read book Interdigitated Back Contact Silicon Solar Cells written by Haifeng Chu and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Design Fabrication and Testing of Silicon Interdigitated Back Contact IBC Solar Cells

Download or read book Design Fabrication and Testing of Silicon Interdigitated Back Contact IBC Solar Cells written by Vito Logiudice and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Interdigitated Back Contact Silicon Heterojunction Solar Cells

Download or read book Interdigitated Back Contact Silicon Heterojunction Solar Cells written by Johann-Christoph Stang and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Interdigitated Back contact Silicon Heterojunction Solar Cells Development of Patterning Techniques and Applications in Tandem Devices

Download or read book Interdigitated Back contact Silicon Heterojunction Solar Cells Development of Patterning Techniques and Applications in Tandem Devices written by Philipp Wagner and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Design Fabrication and Assessment of Integrated Back Contact Silicon Solar Cells

Download or read book The Design Fabrication and Assessment of Integrated Back Contact Silicon Solar Cells written by Ussama Elani and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Optimization of Interdigitated Back Contact Silicon Heterojunction Solar Cells by Two dimensional Numerical Simulation

Download or read book Optimization of Interdigitated Back Contact Silicon Heterojunction Solar Cells by Two dimensional Numerical Simulation written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, two-dimensional (2D) simulation of interdigitated back contact silicon heterojunction (IBC-SHJ) solar cells is presented using Sentaurus Device, a software package of Synopsys TCAD. A model is established incorporating a distribution of trap states of amorphous-silicon material and thermionic emission across the amorphous-silicon / crystalline-silicon heterointerface. The 2D nature of IBC-SHJ device is evaluated and current density-voltage (J-V) curves are generated. Optimization of IBC-SHJ solar cells is then discussed through simulation. It is shown that the open circuit voltage (VOC) and short circuit current density (JSC) of IBC-SHJ solar cells increase with decreasing front surface recombination velocity. The JSC improves further with the increase of relative coverage of p-type emitter contacts, which is explained by the simulated and measured position dependent laser beam induced current (LBIC) line scan. The S-shaped J-V curves with low fill factor (FF) observed in experiments are also simulated, and three methods to improve FF by modifying the intrinsic a-Si buffer layer are suggested: (i) decreased thickness, (ii) increased conductivity, and (iii) reduced band gap. With all these optimizations, an efficiency of 26% for IBC-SHJ solar cells is potentially achievable.

Book Design Criteria for Silicon Solar Cell Power Supplies

Download or read book Design Criteria for Silicon Solar Cell Power Supplies written by P. C. Robison and published by . This book was released on 1959 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: General principles of design are outlined for the use of silicon solar cells for power in space probes. Several electrical characteristics important to design are considered. Analysis of possible geometric configurations of solar cells is given along with a semi-empirical method. Mention is made of temperatures and temperature control. The results are used to indicate a design approach.

Book Analysis of the Interdigitated Back Contact Solar Cells The N type Substrate Lifetime and Wafer Thickness Project Supported by the Chinese Ministry of Science and Technology Projects Grant Nos 2012AA050304 and Y0GZ124S01 the National Natural Science Foundation of China Grant Nos 11104319 11274346 51202285 51402347 and 51172268 and the Fund of the Solar Energy Action Plan from the Chinese Academy of Sciences Grant Nos Y3ZR044001 and Y2YF014001

Download or read book Analysis of the Interdigitated Back Contact Solar Cells The N type Substrate Lifetime and Wafer Thickness Project Supported by the Chinese Ministry of Science and Technology Projects Grant Nos 2012AA050304 and Y0GZ124S01 the National Natural Science Foundation of China Grant Nos 11104319 11274346 51202285 51402347 and 51172268 and the Fund of the Solar Energy Action Plan from the Chinese Academy of Sciences Grant Nos Y3ZR044001 and Y2YF014001 written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: