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Indexed by:期刊论文

Date of Publication:2014-02-10

Journal:APPLIED PHYSICS LETTERS

Included Journals:SCIE、EI、Scopus

Volume:104

Issue:6

ISSN No.:0003-6951

Abstract:The light trapping properties of InP/InGaAs/InP double-heterostructure nanopillar arrays ( DH-NPAs) solar cells have been theoretically investigated. The influence of the geometric parameters on the optical absorption of DH-NPAs has been thoroughly analyzed by using rigorous coupled wave analysis algorithm and finite element method. The optical absorption enhancement of DH-NPAs as compared to InP/InGaAs/InP double-heterostructure nanowire arrays ( DH-NWAs) in the whole wavelength regime has been demonstrated. The short-circuit current of DH-NPAs with the optimized design can achieve 61.3 mA/cm(2), which is 15% higher than that of DH-NWAs with the same geometric configurations, and three times higher than that of thin-film layer with the same thickness. Meanwhile, the absorption profiles at different wavelength and angle-dependant optical properties of DH-NPAs are also evaluated. (C) 2014 AIP Publishing LLC.