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Enhanced broadband and omni-directional performance of polycrystalline Si solar cells by using discrete multilayer antireflection coatings
- Authors
- Oh, Seung Jae; Chhajed, Sameer; Poxson, David J.; Cho, Jaehee; Schubert, E. Fred; Tark, Sung Ju; Kim, Donghwan; Kim, Jong Kyu
- Issue Date
- 14-1월-2013
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS EXPRESS, v.21, no.1, pp.A157 - A166
- Indexed
- SCIE
SCOPUS
- Journal Title
- OPTICS EXPRESS
- Volume
- 21
- Number
- 1
- Start Page
- A157
- End Page
- A166
- ISSN
- 1094-4087
- Abstract
- The performance enhancement of polycrystalline Si solar cells by using an optimized discrete multilayer anti-reflection (AR) coating with broadband and omni-directional characteristics is presented. Discrete multilayer AR coatings are optimized by a genetic algorithm, and experimentally demonstrated by refractive-index tunable SiO2 nano-helix arrays and co-sputtered (SiO2)(x)(TiO2)(1-x) thin film layers. The optimized multilayer AR coating shows a reduced total reflection, leading to the high incident-photon-to-electron conversion efficiency over a correspondingly wide range of wavelengths and incident angles, offering a very promising way to harvest more solar energy by virtually any type of solar cells for a longer time of a day. (C)2012 Optical Society of America
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