Journal article
(Original article)


Low-Temperature Solution-Processed Kesterite Solar Cell Based on in Situ Deposition of Ultrathin Absorber Layer


Publication Details
Author(s): Hou Y, Azimi SH, Gasparini N, Savador M, Chen W, Khanzada LS, Brandl M, Hock R, Brabec C
Publication year: 2015
Volume: 7
Journal issue: 38
Pages range: 21100-21106
ISSN: 1944-8252
Language: English

Abstract

The production of high-performance, solution-processed kesterite Cu2ZnSn(Sx,Se1-x)4 (CZTSSe) solar cells typically relies on high-temperature crystallization processes in chalcogen-containing atmosphere and often on the use of environmentally harmful solvents, which could hinder the widespread adoption of this technology. We report a method for processing selenium free Cu2ZnSnS4 (CZTS) solar cells based on a short annealing step at temperatures as low as 350 °C using a molecular based precursor, fully avoiding highly toxic solvents and high-temperature sulfurization. We show that a simple device structure consisting of ITO/CZTS/CdS/Al and comprising an extremely thin absorber layer (∼110 nm) achieves a current density of 8.6 mA/cm2. Over the course of 400 days under ambient conditions encapsulated devices retain close to 100% of their original efficiency. Using impedance spectroscopy and photoinduced charge carrier extraction by linearly increasing voltage (photo-CELIV), we demonstrate that reduced charge carrier mobility is one limiting parameter of low-temperature CZTS photovoltaics. These results may inform less energy demanding strategies for the production of CZTS optoelectronic layers compatible with large-scale processing techniques.



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How to cite
APA: Hou, Y., Azimi, S.H., Gasparini, N., Savador, M., Chen, W., Khanzada, L.S.,... Brabec, C. (2015). Low-Temperature Solution-Processed Kesterite Solar Cell Based on in Situ Deposition of Ultrathin Absorber Layer. ACS Applied Materials and Interfaces, 7(38), 21100-21106. https://dx.doi.org/10.1021/acsami.5b04468

MLA: Hou, Yi, et al. "Low-Temperature Solution-Processed Kesterite Solar Cell Based on in Situ Deposition of Ultrathin Absorber Layer." ACS Applied Materials and Interfaces 7.38 (2015): 21100-21106.

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