期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 4, 期 3, 页码 866-871出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ee00549e
关键词
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资金
- BP
- Department of Energy, Basic Energy Sciences Energy Frontier Research Center [DE-SC0001293]
- Department of Energy [DE-FG02-07ER46405]
- KNI
- NSF
Crystalline Si wires, grown by the vapor-liquid-solid (VLS) process, have emerged as promising candidate materials for low-cost, thin-film photovoltaics. Here, we demonstrate VLS-grown Si microwires that have suitable electrical properties for high-performance photovoltaic applications, including long minority-carrier diffusion lengths (L-n >> 30 mm) and low surface recombination velocities (S << 70 cm.s(-1)). Single-wire radial p-n junction solar cells were fabricated with amorphous silicon and silicon nitride surface coatings, achieving up to 9.0% apparent photovoltaic efficiency, and exhibiting up to similar to 600 mV open-circuit voltage with over 80% fill factor. Projective single-wire measurements and optoelectronic simulations suggest that large-area Si wire-array solar cells have the potential to exceed 17% energy-conversion efficiency, offering a promising route toward cost-effective crystalline Si photovoltaics.
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