01278nas a2200121   4500008004100000022002500041245014700066210006900213300001400282490000800296520080900304856004301113       1993                        eng d  a0013-4651, 1945-711100aStructure and Composition of Chemically Deposited Thin Films of Bismuth Sulfide and Copper Sulfide Effect on Optical and Electrical Properties0 aStructure and Composition of Chemically Deposited Thin Films of   a754–7590 v1403 aChemically deposited thin films of bismuth sulfide (0.13 μm) and copper sulfide (0.3 μm) and copper sulfide films deposited on bismuth sulfide have been studied so as to obtain information about their structure, composition, thermal stability, and their effect on the optical and electrical properties. The studies establish that bismuth sulfide thin films become crystalline upon air annealing near {200°C} and remain stable up to {300°C.} But oxygen chemisorption reduces the photo‐ and dark conductivities of the films annealed at {300°C.} The studies establish that the copper sulfide films are (covellite), which is stable up to {220°C.} However, films deposited on bismuth sulfide substrate films retain useful electrical and optical properties for annealing temperatures up to {∼300°C.}  uhttp://jes.ecsdl.org/content/140/3/754