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Title: Low-temperature atomic layer deposition of CuSbS2 for thin-film photovoltaics

Journal Article · · ACS Applied Materials and Interfaces

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 (~1.5 eV), large absorption coefficient (>104 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) post process anneal at 225 °C, the ALD-grown CuSbS2 films were crystalline with micron-sized grains, exhibited a band gap of 1.6 eV and an absorption coefficient >104 cm–1, as well as a hole concentration of 1015 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. As a result, while far from optimized, this work demonstrates the potential for ALD-grown CuSbS2 thin films in environmentally benign photovoltaics.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Argonne-Northwestern Solar Energy Research Center (ANSER)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
Grant/Contract Number:
AC02-06CH11357; SC0001059
OSTI ID:
1356821
Journal Information:
ACS Applied Materials and Interfaces, Vol. 9, Issue 5; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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Cited By (11)

Phase pure CuSbS2 thin films by heat treatment of electrodeposited Sb2S3/Cu layers journal January 2020
Copper antimony sulfide thin films for visible to near infrared photodetector applications journal January 2018
Band gap temperature-dependence and exciton-like state in copper antimony sulphide, CuSbS 2 journal August 2018
Copper–antimony and copper–bismuth chalcogenides—Research opportunities and review for solar photovoltaics journal January 2018
Fossil Fuels Environmental Challenges and the Role of Solar Photovoltaic Technology Advances in Fast Tracking Hybrid Renewable Energy System journal June 2019
Spray pyrolysis deposited CuSbS2 absorber layers for thin-film solar cells journal November 2019
New development of atomic layer deposition: processes, methods and applications journal May 2019
Development of sputtered CuSbS 2 thin films grown by sequential deposition of binary sulfides journal April 2018
2D Ternary Chalcogenides journal May 2018
Study of CuSbS 2 thin films nanofibers prepared by spin coating technique using ultra pure water as a solvent journal June 2019
Multimodal characterization of solution-processed Cu 3 SbS 4 absorbers for thin film solar cells journal January 2018