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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.)

Effects of Thermochemical Treatment on CuSbS2 Photovoltaic Absorber Quality and Solar Cell Reproducibility

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de Souza Lucas, Francisco Willian ; Welch, Adam W. ; Baranowski, Lauryn L. ; Dippo, Patricia C. ; Hempel, Hannes ; Unold, Thomas ; Eichberger, Rainer ; Blank, Beatrix ; Rau, Uwe ; Mascaro, Lucia H. ; Zakutayev, Andriy
Total Authors: 11
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 120, n. 33, p. 18377-18385, AUG 25 2016.
Web of Science Citations: 32

CuSbS2 is a promising nontoxic and earth-abundant photovoltaic absorber that is chemically simpler than the widely studied Cu2ZnSnS4. However, CuSbS2 photovoltaic (PV) devices currently have relatively low efficiency and poor reproducibility, often due to suboptimal material quality and insufficient optoelectronic properties. To address these issues, here we develop a thermochemical treatment (TT) for CuSbS2 thin films, which consists of annealing in Sb2S3 vapor followed by a selective KOH surface chemical etch. The annealed CuSbS2 films show improved structural quality and optoelectronic properties, such as stronger band-edge photoluminescence and longer photoexcited carrier lifetime. These improvements also lead to mote reproducible CuSbS2 PV devices, with performance currently limited by a large cliff-type interface band offset with CdS contact. Overall, these results point to the potential avenues to further increase the performance Of CuSbS2 thin film solar cell, and the findings can be transferred to other thin film photovoltaic technologies. (AU)

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