Quantifying point defects in Cu2ZnSn(S,Se)4 thin films using resonant x-ray diffraction
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
Cu 2ZnSn(S,Se)4 is an interesting, earth abundant photovoltaic material, but has suffered from low open circuit voltage. To better understand the film structure, we have measured resonant x-ray diffraction across the Cu and Zn K-edges for the device quality thin films of Cu 2ZnSnS4 (8.6% efficiency) and Cu 2ZnSn(S,Se)4 (3.5% efficiency). This approach allows for the confirmation of the underlying kesterite structure and quantification of the concentration of point defects and vacancies on the Cu, Zn, and Sn sublattices. Rietveld refinement of powder diffraction data collected at multiple energies is used to determine that there exists a high level of Cu Zn and Zn Cu defects on the 2c and 2d Wyckoff positions. We observe a significantly lower concentration of Zn Sn defects and Cu or Zn vacancies.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Inverse Design (CID); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-76SF00515; AC36−08GO28308; AC36-08GO28308
- OSTI ID:
- 1353056
- Alternate ID(s):
- OSTI ID: 1332482; OSTI ID: 1420534
- Report Number(s):
- NREL/JA-5K00-67431; TRN: US1701378
- Journal Information:
- Applied Physics Letters, Vol. 109, Issue 16; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Point defects in Cu 2 ZnSnSe 4 (CZTSe): Resonant X-ray diffraction study of the low-temperature order/disorder transition : Point defects in Cu
|
journal | July 2017 |
The effect of stoichiometry on Cu-Zn ordering kinetics in Cu 2 ZnSnS 4 thin films
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journal | April 2018 |
A practical field guide to thermoelectrics: Fundamentals, synthesis, and characterization
|
journal | June 2018 |
Atomistic consideration of earth-abundant chalcogenide materials for photovoltaics: Kesterite and beyond
|
journal | October 2018 |
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