Photovoltaic electrical properties of aqueous grown ZnO antireflective nanostructure on Cu(In,Ga)Se_2 thin film solar cells | Zendy

Yi-Chih Wang | Zendy; Bing-Yi Lin | Zendy; PoTsun Liu | Zendy; Han-Ping D. Shieh | Zendy

Open Access

Photovoltaic electrical properties of aqueous grown ZnO antireflective nanostructure on Cu(In,Ga)Se_2 thin film solar cells

Author(s) -

Yi-Chih Wang,

Bing-Yi Lin,

PoTsun Liu,

Han-Ping D. Shieh

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.000a13

Subject(s) - materials science , photocurrent , nanorod , anti reflective coating , optoelectronics , transmittance , photovoltaic system , optics , thin film , refractive index , layer (electronics) , absorption (acoustics) , nanotechnology , composite material , ecology , physics , biology

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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