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CuInS2 Films Deposited by Aerosol-Assisted Chemical Vapor Deposition Using Ternary Single-Source PrecursorsPolycrystalline CuInS2 films were deposited by aerosol-assisted chemical vapor deposition using both solid and liquid ternary single-source precursors (SSPs) prepared in-house. Films with either (112) or (204/220) preferred orientation were obtained, and compositional analysis showed that (112)-oriented films contained more copper than (204/220)-oriented films. Using X-ray diffraction, the signature of chalcopyrite structure was often confirmed for (112)-oriented films. The preferred orientation of the film is likely related to the decomposition and reaction kinetics associated with the molecular structure of the precursors at the substrate. Interestingly, the (204/220)-oriented films were always accompanied by a secondary phase, which was identified as an unknown In-rich compound from the results of post-growth annealing, etching experiments, and Raman spectroscopic data. By increasing Cu to In ratio in the film, (112)-oriented films were obtained with a maximum grain size of about 0.5 micrometers, and their X-ray diffractions did not show any observable signature of the In secondary phase. Electrical and optical properties of all the films grown were characterized. They all showed p-type conduction with an electrical resistivity between 0.1 omega cm and 30 omega cm, and an optical band gap of 1.46eV +/- 0.02, as deposited. The material properties of deposited films revealed this methodology of using SSPs for fabricating chalcopyrite-based solar cells to be highly promising.
Document ID
20040120865
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Jin, Michael H.-C.
(Ohio Aerospace Inst. Brook Park, OH, United States)
Banger, Kulbinder K.
(Ohio Aerospace Inst. Brook Park, OH, United States)
Harris, Jerry D.
(Cleveland State Univ. Cleveland, OH, United States)
Hepp, Aloysius F.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 22, 2013
Publication Date
January 1, 2004
Subject Category
Chemistry And Materials (General)
Funding Number(s)
CONTRACT_GRANT: NCC3-947
WBS: WBS 22-319-20-A1
Distribution Limits
Public
Copyright
Public Use Permitted.
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