Photovoltaic electrical properties of aqueous grown ZnO antireflective nanostructure on Cu(In,Ga)Se2 thin film solar cells

Yi Chih Wang, Bing Yi Lin, Po-Tsun Liu, Han Ping D. Shieh

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A solution-grown subwavelength antireflection coating has been investigated for enhancing the photovoltaic efficiency of thin film solar cells. The 100-nm-height ZnO nanorods coating benefited the photocurrent of Cu(In,Ga)Se2 solar cells from 31.7 to 34.5 mA/cm2 via the decrease of surface light reflectance from 14.5% to 7.0%, contributed by the gradual refractive index profile between air and AZO window layer. The further reduction of surface reflectance to 2.3% in the case of 540-nm-height nanorods, yet, lowered the photocurrent to 29.5 mA/cm2, attributed to the decrease in transmittance. The absorption effect of hydrothermal grown ZnO nanorods was explored to optimize the antireflection function in enhancing photovoltaic performances.

Original languageEnglish
Pages (from-to)A13-A20
Number of pages8
JournalOptics Express
Volume22
Issue numberS1
DOIs
StatePublished - 13 Jan 2014

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