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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Characterization of defects in copper antimony disulfide

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de Souza Lucas, Francisco Willian [1, 2] ; Peng, Haowei [2] ; Johnston, Steve [2] ; Dippo, Patricia C. [2] ; Lany, Stephan [2] ; Mascaro, Lucia H. [1] ; Zakutayev, Andriy [2]
Total Authors: 7
[1] Univ Fed Sao Carlos, BR-13565905 Sao Carlos, SP - Brazil
[2] Natl Renewable Energy Lab, Golden, CO 80401 - USA
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF MATERIALS CHEMISTRY A; v. 5, n. 41, p. 21986-21993, NOV 7 2017.
Web of Science Citations: 10

Copper antimony disulfide (CuSbS2) with the chalcostibite structure is a promising photovoltaic (PV) absorber material with several excellent measured optoelectronic properties, such as a solar matched band gap and tunable hole concentration. However, much less is known from an experimental perspective about defects in CuSbS2, even though the defects are critical for solar cell performance. Here, we explore the defect properties in CuSbS2 thin film materials and photovoltaic devices using photoluminescence and capacitance-based spectroscopies, as well as first principles theoretical calculations. We measured three electrically and optically active acceptor defects in CuSbS2, and assigned them to the copper vacancies, sulfur vacancies, and/or copper on antimony antisites by comparison with theoretical calculations. Their activation energies, concentrations, and capture cross sections have been determined and compared to other chalcogenide absorber materials. These fundamental parameters should enable more accurate simulations of CuSbS2 PV devices, paving the way for future improvements in CuSbS2 solar cell efficiencies. (AU)

FAPESP's process: 16/10513-3 - Synthesis and Application of Functional Nanostructured Materials in Electro/photoelectrocatalysis under Continuous Flow Conditions: A New Perspective for Synthesis and Functionalization of Heterocyclic System.
Grantee:Francisco Willian de Souza Lucas
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 14/12166-3 - The effect of post-deposition processing on photovoltaic performance of ternary copper chalcogenide solar cell
Grantee:Francisco Willian de Souza Lucas
Support type: Scholarships abroad - Research Internship - Doctorate