Polycrystalline thin-film cadmium telluride solar cells fabricated by electrodeposition. Annual technical report

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During the past year, Colorado School of Mines (CSM) researchers performed systematic studies of the growth and properties of electrodeposition CdS and back-contact formation using Cu-doped ZnTe, with an emphasis on low Cu concentrations. CSM also started to explore the stability of its ZnTe-Cu contacted CdTe solar cells. Researchers investigated the electrodeposition of CdS and its application in fabricating CdTe/CdS solar cells. The experimental conditions they explored in this study were pH from 2.0 to 3.0; temperatures of 80 and 90 C; CdCl{sub 2} concentration of 0.2 M; deposition potential from {minus}550 to {minus}600 mV vs. Ag/AgCl electrode; [Na{sub 2}S{sub ... continued below

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35 p.

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Trefny, J.U. & Mao, D. January 1, 1998.

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Description

During the past year, Colorado School of Mines (CSM) researchers performed systematic studies of the growth and properties of electrodeposition CdS and back-contact formation using Cu-doped ZnTe, with an emphasis on low Cu concentrations. CSM also started to explore the stability of its ZnTe-Cu contacted CdTe solar cells. Researchers investigated the electrodeposition of CdS and its application in fabricating CdTe/CdS solar cells. The experimental conditions they explored in this study were pH from 2.0 to 3.0; temperatures of 80 and 90 C; CdCl{sub 2} concentration of 0.2 M; deposition potential from {minus}550 to {minus}600 mV vs. Ag/AgCl electrode; [Na{sub 2}S{sub 2}O{sub 4}] concentration between 0.005 and 0.05 M. The deposition rate increases with increase of the thiosulfate concentration and decrease of solution pH. Researchers also extended their previous research of ZnTe:Cu films by investigating films doped with low Cu concentrations (< 5 at. %). The low Cu concentration enabled them to increase the ZnTe:Cu post-annealing temperature without causing excessive Cu diffusion into CdTe or formation of secondary phases. The effects of Cu doping concentration and post-deposition annealing temperature on the structural, compositional, and electrical properties of ZnTe were studied systematically using X-ray diffraction, atomic force microscopy, electron microprobe, Hall effect, and conductivity measurements.

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35 p.

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OSTI as DE98001925

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  • Other Information: PBD: Jan 1998

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  • Other: DE98001925
  • Report No.: NREL/SR--520-23994
  • Grant Number: AC36-83CH10093
  • DOI: 10.2172/564269 | External Link
  • Office of Scientific & Technical Information Report Number: 564269
  • Archival Resource Key: ark:/67531/metadc698023

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  • January 1, 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • March 31, 2016, 9 p.m.

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Trefny, J.U. & Mao, D. Polycrystalline thin-film cadmium telluride solar cells fabricated by electrodeposition. Annual technical report, report, January 1, 1998; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc698023/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.