title: Efficiency enhancement of non-selenized Cu(In,Ga)Se2 solar cells employing scalable low-cost antireflective coating.
abstract: In this study, a non-selenized CuInGaSe2 (CIGS) solar device with textured zinc oxide (ZnO) antireflection coatings was studied. The ZnO nanostructure was fabricated by a low-temperature aqueous solution deposition method. With controlling the morphology of the solution-grown tapered ZnO nanorod coatings, the average reflectance of the CIGS solar device decreased from 8.6% to 2.1%, and the energy conversion efficiency increased from 9.1% to 11.1%. The performance improvement in the CuInGaSe2 thin-film solar cell was well explained due to the gradual increase of the refractive index between air and the top electrode of solar cell device by the insertion of the ZnO nanostructure. The results demonstrate a potential application of the ZnO nanostructure array for efficient solar device technology.
authors.affiliation: Department of Electrical Engineering, National Tsing Hua University, Hsinchu City 30013, Taiwan.
authors.forename: Bao-Tang
authors.initials: BT
authors.lastname: Jheng
authors.affiliation: Department of Photonics & Display Institute, National Chiao Tung University, Hsinchu City 30010, Taiwan.
authors.forename: Po-Tsun
authors.initials: PT
authors.lastname: Liu
authors.affiliation: Department of Electrical Engineering, National Tsing Hua University, Hsinchu City 30013, Taiwan.
authors.forename: Meng-Chyi
authors.initials: MC
authors.lastname: Wu
keywords: Anti-reflection (AR) coating; Thin-film solar cell (TFSC); Zinc oxide (ZnO)
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