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Title: Spray pyrolysis of CuIn(S,Se)2 solar cells with 5.9% efficiency : a method to prevent Mo oxidation in ambient atmosphere
Authors: Ho, John C. W.
Zhang, Tianliang
Lee, Kian Keat
Wong, Lydia H.
Tok, Alfred Iing Yoong
Batabyal, Sudip Kumar
Keywords: DRNTU::Engineering::Materials
Issue Date: 2014
Source: Ho, J. C. W., Zhang, T., Lee, K. K., Batabyal, S. K., Tok, A. I. Y., & Wong, L. H. (2014). Spray Pyrolysis of CuIn(S,Se)2 Solar Cells with 5.9% Efficiency: A Method to Prevent Mo Oxidation in Ambient Atmosphere. ACS Applied Materials and Interfaces, 6(9), 6638–6643.
Series/Report no.: ACS applied materials and interfaces
Abstract: Direct spray pyrolysis to form CuInS2 (CIS) on molybdenum substrate in ambient environment has been a challenge because of the ease of Mo oxidation at low temperatures. MoO2 formation affects the wettability of precursor solution during spray pyrolysis, which degrades the uniformity of CIS film and acts as a resistive layer for carrier transport. In this paper, Mo oxidation was prevented by using excess sulfur in the precursor solution under a gradual heating and spray process. A thin precursor layer was initially deposited as a barrier layer to prevent oxygen adsorption on Mo surface before the temperature was increased further to form polycrystalline CuInS2. The CuIn(S,Se)2 (CISSe) device fabricated from selenization of the spray-pyrolyzed CIS film exhibited a power conversion efficiency (PCE) of 5.9%. The simple spray method proposed here can be used to deposit a variety of Cu-based chalcopyrite precursor to produce high-quality thin film solar cells.
ISSN: 1944-8244
DOI: 10.1021/am500317m
Rights: © 2014 American Chemical Society
Fulltext Permission: none
Fulltext Availability: No Fulltext
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