Enhanced broadband and omni-directional performance of polycrystalline si solar cells by using discrete multilayer antireflection coatings

Seung Jae Oh, Sameer Chhajed, David J. Poxson, Jaehee Cho, E. Fred Schubert, Sung Ju Tark, Donghwan Kim, Jong Kyu Kim

Research output: Contribution to journalArticle

35 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)A157-A166
JournalOptics Express
Issue number101
Publication statusPublished - 2013 Jan 14


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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