nCdS/pCdTe thin film solar cells. Comparisons between cells with different efficiencies

Morris G.C., Tanner P.G. and Tottszer A. (1991) nCdS/pCdTe thin film solar cells. Comparisons between cells with different efficiencies. Materials Forum, 15 1: 21-29.

Author Morris G.C.
Tanner P.G.
Tottszer A.
Title nCdS/pCdTe thin film solar cells. Comparisons between cells with different efficiencies
Journal name Materials Forum
ISSN 0883-2900
Publication date 1991-01-01
Sub-type Article (original research)
Open Access Status Not yet assessed
Volume 15
Issue 1
Start page 21
End page 29
Total pages 9
Language eng
Subject 1501 Accounting, Auditing and Accountability
2200 Engineering
2215 Building and Construction
2507 Polymers and Plastics
Abstract Thin film solar cells have been made by the sequence of steps: (i) electrodeposition of CdS on conducting glass; (ii) electrodeposition of CdTe on CdS/substrate; (iii) heating in air to form the nCdS/pCdTe heterojunction; (iv) chemical etching of the pCdTe followed by metallization to complete the solar cell glass/indium tin oxide/nCdS/pCdTe/Au. The solar to electrical energy conversion efficiency of solar cells made in our laboratory has reached 13.1%, but variations can occur even between cells prepared on the same substrate under what have been considered identical conditions. To understand the reasons for these variations, cell characteristics have been studied by current-voltage-temperature dependences and by capacitance-voltage-frequency-temperature dependences. These studies have highlighted differences between cells with different conversion efficiencies by demonstrating the different current generation mechanisms operating and the different values of cell parameters. A high density of interband gap states (>10 eV cm) has been found with the majority near the CdS/CdTe interface. The short circuit current has been optimized but not the open circuit voltage and fill factor. Empirical relationships which relate the ionized charge density, short circuit current, depletion width and efficiency have demonstrated the changes needed to improve cell characteristics.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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