Characterization of highly efficient CdTe thin film solar cells by low-temperature photoluminescence

Tamotsu Okamoto, Yuichi Matsuzaki, Nowshad Amin, Akira Yamada, Makoto Konagai

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Highly efficient CdTe thin film solar cells prepared by close-spaced sublimation (CSS) method with a glass/ITO/CdS/CdTe/Cu-doped carbon/Ag structure were characterized by low-temperature photoluminescence (PL) measurement. A broad 1.42 eV band probably due to VCd-Cl defect complexes appeared as a result of CdCl2 treatment. CdS/CdTe junction PL revealed that a CdSxTe1-x mixed crystal layer was formed at the CdS/CdTe interface region during the deposition of CdTe by CSS and that CdCl2 treatment promoted the formation of the mixed crystal layer. Furthermore, in the PL spectra of the heat-treated CdTe after screen printing of the Cu-doped carbon electrode, a neutral-acceptor bound exciton (ACu 0, X) line at 1.590 eV was observed, suggesting that Cu atoms were incorporated into CdTe as effective acceptors after the heat treatment.

Original languageEnglish
Pages (from-to)3894-3899
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume37
Issue number7
Publication statusPublished - Jul 1998
Externally publishedYes

Fingerprint

Photoluminescence
solar cells
Sublimation
mixed crystals
sublimation
photoluminescence
thin films
ITO glass
Crystals
Carbon
Screen printing
carbon
ITO (semiconductors)
Excitons
printing
Temperature
heat treatment
Heat treatment
excitons
heat

Keywords

  • CdTe
  • Close-spaced sublimation
  • II-VI compounds
  • Photoluminescence
  • Solar cells

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering(all)

Cite this

Characterization of highly efficient CdTe thin film solar cells by low-temperature photoluminescence. / Okamoto, Tamotsu; Matsuzaki, Yuichi; Amin, Nowshad; Yamada, Akira; Konagai, Makoto.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 37, No. 7, 07.1998, p. 3894-3899.

Research output: Contribution to journalArticle

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