High efficiency CdTe solar cells by close spaced sublimation
- 30 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 389-393
- https://doi.org/10.1109/pvsc.1993.347151
Abstract
High efficiency CdTe/CdS solar cells have been prepared on glass substrates. The CdS films are deposited on SnO/sub 2/ coated 7059 glass substrates by the chemical bath deposition process (CBD) to a thickness of 500-1200 /spl Aring/. The CdTe films are deposited by the close-spaced sublimation (CSS) technique to a thickness of 4-8 /spl mu/m. Doped-graphite paste is used as the ohmic contact to the CdTe. The substrate temperature used for the deposition of the CdTe films appears to be an important parameter for the junction formation process. It is believed to be critical in the formation of an interface Cd/sub x/S/sub 1-x/Te mixed crystal layer. The heat treatment of the CdS films in hydrogen is also an important processing step, and it must be modified as the thickness of the CdS films is decreased in order to maintain high fill factors. High photocurrents in conjunction with high open-circuit voltages and fill factors are achieved by properly adjusting the annealing conditions of thin CdS films. The open-circuit voltage, short-circuit current, and fill factor of the best device were 843 mV, 25.1 mA/cm/sup 2/, and 74.5% respectively, corresponding to a conversion efficiency of 15.8% as measured under AM1.5 conditions at the National Renewable Energy Laboratory.Keywords
This publication has 10 references indexed in Scilit:
- Interdiffusion of CdS and CdTe in screenprinted and sintered CdS-CdTe solar cellsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Thin film solar cells based on electrodeposited CdTePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- High efficiency CdS/CdTe solar cells from solution-grown CdS filmsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Minority-carrier lifetime of polycrystalline CdTe in CdS/CdTe solar cellsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- 14.6% efficient thin-film cadmium telluride heterojunction solar cellsIEEE Electron Device Letters, 1992
- Development and Evaluation of Cds/CdTe Thin Film PV CellsPublished by Springer Nature ,1991
- Diode quality factor determination for thin-film solar cellsSolar Cells, 1989
- Electrical properties of CdS/CdTe heterojunctionsJournal of Applied Physics, 1988
- Growth of CdTe films by close-spaced vapor transportJournal of Vacuum Science & Technology A, 1984
- Effect of oxygen on the photoluminescence of CdS/CdTe thin filmsJournal of Applied Physics, 1984