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Optical Absorption Enhancement: Optical Absorption Enhancement in Freestanding GaAs Thin Film Nanopyramid Arrays (Adv. Energy Mater. 10/2012)
Author(s) -
Liang Dong,
Huo Yijie,
Kang Yangsen,
Wang Ken Xingze,
Gu Anjia,
Tan Meiyueh,
Yu Zongfu,
Li Shuang,
Jia Jieyang,
Bao Xinyu,
Wang Shuang,
Yao Yan,
Wong H.S. Philip,
Fan Shanhui,
Cui Yi,
Harris James S.
Publication year - 2012
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201290050
Subject(s) - materials science , absorption (acoustics) , optoelectronics , thin film , optics , semiconductor , nanostructure , nanotechnology , composite material , physics
III–V compound semiconductor multi‐junction solar cells are the most efficient of all solar cells. However, in order to reduce high costs, ultra‐thin films with advanced light management are desired. On page 1254 , James S. Harris, Yi Cui, Dong Liang, and co‐workers report that a 160‐nm‐thick GaAs thin film of nanopyramid arrays on flexible transparent superstrates demonstrates excellent optical absorption properties. Due to significant antireflection and light trapping effects, the double‐sided nanostructures enhance the photon absorption in the thin film by over 80% at near normal incidence and over 100% at 40–70° incidence.