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Title: Synthesis of CZTS/Se and Their Solid Solution from Electrodeposited Cu–Sn–Zn Metal Precursor: A Study of S and Se Replacement Reaction

Journal Article · · ACS Applied Energy Materials
 [1];  [2];  [3];  [4]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [4]
  1. Indian Institute of Technology, Mumbai (India); National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Indian Institute of Technology, Mumbai (India)
  3. CSIR - National Physical Lab., New Delhi (India); National Renewable Energy Lab. (NREL), Golden, CO (United States)
  4. National Renewable Energy Lab. (NREL), Golden, CO (United States)

Selenization, sulfurization, and sulfo-selenization of electrodeposited metal precursor (Cu-Sn-Zn) at high temperature (500-600 °C) in S, Se, or S + Se (mixed) atmospheres are used to understand the thermodynamics of chalcogenide incorporation reaction. Phase-pure CZTSe and CZTS were obtained after annealing at 500 degrees C for 1 min in Se (selenization) and 600 degrees C for 10 min in S (sulfurization) atmospheres, respectively. CZTSSe solid solutions are synthesized by the sequential annealing of metal precursors in S and Se atmosphere separately or in the mixed (S + Se) atmosphere. In the S-rich mixed atmosphere, S-rich CZTSSe solid solution is formed at all annealing conditions. Surprisingly, in a Se-rich mixed atmosphere, longer annealing at 600 degrees C yields S-rich CZTSSe. The CZTSSe film formed by annealing in near equimolar S/Se atmosphere exhibits a compositional gradient across the thickness. Furthermore, these results suggest that the crystallinity, composition, and hence the bandgap of CZTSSe can be precisely controlled by the proper choice of annealing temperature, duration, and atmosphere.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1461794
Report Number(s):
NREL/JA-5K00-71719
Journal Information:
ACS Applied Energy Materials, Vol. 1, Issue 7; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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  • Fairbrother, Andrew; Fontané, Xavier; Izquierdo-Roca, Victor
  • Progress in Photovoltaics: Research and Applications, Vol. 22, Issue 4 https://doi.org/10.1002/pip.2473
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Figures / Tables (6)