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

doi:10.1364/OE.22.000A13

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

Department of Photonics

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	A13-A20
Number of pages	8
Journal	Optics Express
Volume	22
Issue number	S1
DOIs	https://doi.org/10.1364/OE.22.000A13
State	Published - 13 Jan 2014

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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.",

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