Device Architecture and Lifetime Requirements for High Efficiency Multicrystalline Silicon Solar Cells
Name
Device Architecture.pdf
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331.29 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Mitchell, Bernhard
Altermatt, Pietro P.
Wagner, Hannes
Hofstetter, Jasmin
Buonassisi, Anthony
Date Issued
August 2015
Journal
Energy Procedia
Publisher
Elsevier
Citation
Wagner, Hannes et al. “Device Architecture and Lifetime Requirements for High Efficiency Multicrystalline Silicon Solar Cells.” Energy Procedia 77 (2015): 225–230.
Version
Final published version
Abstract
We present a numerical simulation study of different multicrystalline silicon materials and solar cell architectures to understand today's efficiency limitations and future efficiency possibilities. We compare conventional full-area BSF and PERC solar cells to future cell designs with a gallium phosphide heteroemitter. For all designs, mc-Si materials with different excess carrier lifetime distributions are used as simulation input parameters to capture a broad range of materials. The results show that conventional solar cell designs are sufficient for generalized mean lifetimes between 40 – 90 μs, but do not give a clear advantage in terms of efficiency for higher mean lifetime mc-Si material because they are often limited by recombination in the phosphorus diffused emitter region. Heteroemitter designs instead increase in cell efficiency considerable up to generalized mean lifetimes of 380 μs because they are significantly less limited by recombination in the emitter and the bulk lifetime becomes more important. In conclusion, to benefit from increasing mc-Si lifetime, new cell designs, especially heteroemitter, are desirable.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.egypro.2015.07.031
