dc.contributor.authorHo, John C. W.
dc.contributor.authorZhang, Tianliang
dc.contributor.authorLee, Kian Keat
dc.contributor.authorBatabyal, Sudip Kumar
dc.contributor.authorTok, Alfred Iing Yoong
dc.contributor.authorWong, Lydia H.
dc.identifier.citationHo, 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.en_US
dc.description.abstractDirect 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.en_US
dc.relation.ispartofseriesACS applied materials and interfacesen_US
dc.rights© 2014 American Chemical Societyen_US
dc.titleSpray pyrolysis of CuIn(S,Se)2 solar cells with 5.9% efficiency : a method to prevent Mo oxidation in ambient atmosphereen_US
dc.typeJournal Article
dc.contributor.researchEnergy Research Instituteen_US
dc.contributor.researchResearch Techno Plazaen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US

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