Low-Temperature Atomic Layer Deposition of CuSbS2 for Thin-Film Photovoltaics

被引：56

作者：

Riha, Shannon C. ^{[1
]}

Koegel, Alexandra A. ^{[1
]}

Emery, Jonathan D. ^{[2
,4
]}

Pellin, Michael J. ^{[3
,4
]}

Martinson, Alex B. F. ^{[3
,4
]}

机构：

[1] Univ Wisconsin, Dept Chem, Stevens Point, WI 54481 USA

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[3] Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA

[4] Argonne Natl Lab, Argonne Northwestern Solar Energy Res ANSER Ctr, 9700 S Cass Ave, Argonne, IL 60439 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 05期

关键词：

copper antimony sulfide; CuSbS2; thin film; atomic layer deposition; photovoltaics; thin-film solar cell; ternary metal sulfide; COPPER-ANTIMONY-SULFIDE; CU(IN; GA)SE-2; SOLAR-CELLS; ABSORBER MATERIAL; HIGH-EFFICIENCY; 20.8-PERCENT; NANOCRYSTALS; 21.7-PERCENT; FABRICATION; CONVERSION; PROGRESS;

D O I：

10.1021/acsami.6b13033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Copper antimony sulfide (CuSbS2) has been gaining traction as an earth-abundant absorber for thin-film photovoltaics given its near ideal band gap for solar energy conversion (similar to 1.5 eV), large absorption coefficient (>10(4) cm(-1)), and elemental abundance. Through careful in situ analysis of the deposition conditions, a low-temperature route to CuSbS2 thin films via atomic layer deposition has been developed. After a short (15 min) postprocess anneal at 225 degrees C, the ALD-grown CuSbS2 films were crystalline with micron-sized grains, exhibited a band gap of 1.6 eV and an absorption coefficient >10(4) cm(-1), as well as a hole concentration of 10(15) cm(-3). Finally, the ALD-grown CuSbS2 films were paired with ALD-grown TiO2 to form a photovoltaic device. This photovoltaic device architecture represents one of a very limited number of Cd-free CuSbS2 PV device stacks reported to date, and it is the first to demonstrate an open-circuit voltage on par with CuSbS2/CdS heterojunction PV devices. While far from optimized, this work demonstrates the potential for ALD-grown CuSbS2 thin films in environmentally benign photovoltaics.

引用

页码：4667 / 4673

页数：7

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