title: Advanced light-trapping effect of thin-film solar cell with dual photonic crystals.
abstract: A thin-film solar cell with dual photonic crystals has been proposed, which shows an advanced light-trapping effect and superior performance in ultimate conversion efficiency (UCE). The shapes of nanocones have been optimized and discussed in detail by self-definition. The optimized shape of nanocone arrays (NCs) is a parabolic shape with a nearly linearly graded refractive index (GRI) profile from the air to Si, and the corresponding UCE is 30.3% for the NCs with a period of 300 nm and a thickness of only 2 μm. The top NCs and bottom NCs of the thin film have been simulated respectively to investigate their optimized shapes, and their separate contributions to the light harvest have also been discussed fully. The height of the top NCs and bottom NCs will also influence the performances of the thin-film solar cell greatly, and the result indicates that the unconformal NCs have better light-trapping ability with an optimal UCE of 32.3% than the conformal NCs with an optimal UCE of 30.3%.
authors.affiliation: School of Computer and Information, Hefei University of Technology, 193# Tunxi Road, Hefei, 230009 Anhui Province China.
authors.forename: Anjun
authors.initials: A
authors.lastname: Zhang
authors.affiliation: School of Computer and Information, Hefei University of Technology, 193# Tunxi Road, Hefei, 230009 Anhui Province China ; Department of Optoelectronics Science, Harbin Institute of Technology, Weihai Campus, 2# Wenhua West Road, Weihai, 264209 Shandong Province China.
authors.forename: Zhongyi
authors.initials: Z
authors.lastname: Guo
authors.affiliation: School of Computer and Information, Hefei University of Technology, 193# Tunxi Road, Hefei, 230009 Anhui Province China.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Tao
authors.affiliation: Department of Optoelectronics Science, Harbin Institute of Technology, Weihai Campus, 2# Wenhua West Road, Weihai, 264209 Shandong Province China ; Department of Physics, Harbin Institute of Technology, 91# West Dazhi Street, Harbin, 150001 Heilongjiang Province China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Optoelectronics Science, Harbin Institute of Technology, Weihai Campus, 2# Wenhua West Road, Weihai, 264209 Shandong Province China.
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Mao
authors.affiliation: Department of Optoelectronics Science, Harbin Institute of Technology, Weihai Campus, 2# Wenhua West Road, Weihai, 264209 Shandong Province China.
authors.forename: Guanghua
authors.initials: G
authors.lastname: Fan
authors.affiliation: Department of Physics, Harbin Institute of Technology, 91# West Dazhi Street, Harbin, 150001 Heilongjiang Province China.
authors.forename: Keya
authors.initials: K
authors.lastname: Zhou
authors.affiliation: Department of Optoelectronics Science, Harbin Institute of Technology, Weihai Campus, 2# Wenhua West Road, Weihai, 264209 Shandong Province China.
authors.forename: Shiliang
authors.initials: S
authors.lastname: Qu
keywords: Dual photonic crystals; Light trapping; Optimized shape; Thin film solar cells