Enhanced performance of solar cells with optimized surface recombination and efficient photon capturing via anisotropic-etching of black silicon

Journal Article · Mon May 12 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4878096· OSTI ID:22273409

Chen, H. Y.; Hong, M.; Zhang, Y. B.; Cai, Bin; Zhu, Y. M. ^[1]; Zhang, Y.; Liu, Z. Q.; Wang, J. X.; Li, J. M. ^[2]

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1. Shanghai Key Lab of Modern Optical System and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for Science and Technology, Shanghai 200093 (China)
2. Semiconductor Lighting R and D Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)

We report an enhanced conversion efficiency of femtosecond-laser treated silicon solar cells by surface modification of anisotropic-etching. The etching improves minority carrier lifetime inside modified black silicon area substantially; moreover, after the etching, an inverted pyramids/upright pyramids mixed texture surface is obtained, which shows better photon capturing capability than that of conventional pyramid texture. Combing of these two merits, the reformed solar cells show higher conversion efficiency than that of conventional pyramid textured cells. This work presents a way for fabricating high performance silicon solar cells, which can be easily applied to mass-production.

• OSTI ID: 22273409
• Journal Information: Applied Physics Letters, Vol. 104, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
CARRIER LIFETIME
ETCHING
PHOTONS
RECOMBINATION
SILICON
SILICON SOLAR CELLS
SURFACES