Annealing Study of the Electrochemically Deposited InSxOy Thin Film and Its Photovoltaic Application

Ashraf M. Abdel HALEEM  Masashi KATO  Masaya ICHIMURA  

IEICE TRANSACTIONS on Electronics   Vol.E92-C   No.12   pp.1464-1469
Publication Date: 2009/12/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.1464
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Nanomaterials and Nanodevices for Nanoscience and Nanotechnology)
Category: Fundamentals for Nanodevices
thin films,  solar cells,  indium sulfide oxide,  annealing,  heterojunction,  

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Indium-sulfide-oxide thin films have been successfully deposited on indium-tin-oxide-coated glass from an aqueous solution containing Na2S2O3 and In2(SO4)3 by electrochemical deposition using a periodic 2-step-pulse voltage. The films have been annealed in nitrogen atmosphere for an hour at different temperatures; namely, 100, 200, 300 and 400. Then, the as-deposited and annealed films were characterized structurally, morphologically and optically. X-ray photoelectron spectroscopy (XPS) study was performed in order to understand the chemical states of the oxygen involved in the film composition. The photosensitivity was observed by means of photoelectrochemical measurements, which confirmed that the as-deposited and annealed films showed n-type conduction. Moreover, a heterostructure solar cell that has indium sulfide as a buffer layer and tin sulfide as an absorber was fabricated and characterized.