Cadmium sulfide/copper sulfide heterojunction cell research. Technical progress report No. 4, July 1-September 30, 1978 [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 1978.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 86 : digital, PDF file
- Additional Creators:
- Westinghouse Electric Corporation
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- Important advances have been made in five technical areas during this quarter: topological investigations of film materials and cells, characterization of current transport and collection in Cu/sub 2/S/CdS cells, preparation and application of small area film cells, correlation of photoresponse image and structural features in film cells and means of preparing (CdZn)S alloy films. The use of potassium cyanide etching of Cu/sub 2/S layers on polycrystalline CdS films defined areas 1 to 5 ..mu..m across with the latter covering 30 to 50% of the surfaces studied. Large grains may strongly reduce short circuit current levels. Laser scanned photocurrent response of tapered Cu/sub 2/S layers on single crystal CdS has been refined to directly treat photocurrent-transmission data, allowing more firm estimates of lifetime, surface recombination velocity and heterojunction collection efficiency. Delineation of small area film cells has been done successfully using photolithographic methods. As used, these methods have no deleterious influence on cell behavior. With arrays of small cells on a single substrate it was possible to establish that increased junction opposing current (lower V/sub OC/) results from longer immersions in CuCl during Cu/sub 2/S formation. Patterns of high response in laser-scanned photocurrent images have been correlated with SEM images of grain boundary patterns. Difficulties in the use of a quadrupole mass analyzer to monitor component fluxes during (ZnCd)S evaporation were isolated and overcome, allowing use of the method to prepare films for structural, electrical, and cell evaluation.
- Published through SciTech Connect.
O' Szedon, J. R.; Shirland, F. A.; Biter, W. J.; Stoll, J. A.; Dickey, H. C.; Keeffe, T. W.
- Funding Information:
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