Effects of ZnO-nanostructure antireflection coatings on sulfurization-free Cu2ZnSnS4 absorber deposited by single-step co-sputtering process

Bao Tang Jheng, Po-Tsun Liu*, Min Chuan Wang, Meng Chyi Wu

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

ZnO nanostructures as anti-reflective coatings were synthesized by using hydrothermal technique for a sulfurization-free Cu2ZnSnS4 absorber prepared by co-sputtering deposition. By controlling the morphology of solution-grown ZnO nanostructures, the average reflectance of the Cu 2ZnSnS4 solar cell with branched ZnO nanorods decreased from 7.6% to 1.12%, and the energy conversion efficiency promoted by 10.4% from the initial value of 4.8% to 5.3%. The efficiency improvement was well studied with the effects of the gradually increased refractive index between the air and the top electrode of Cu2ZnSnS4 solar device, due to the presence of the ZnO nanostructure.

Original languageEnglish
Article number052904
JournalApplied Physics Letters
Volume103
Issue number5
DOIs
StatePublished - 29 Jul 2013

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