Photoluminescence Studies on Cu and O Defects in Crystalline and Thin-Film CdTe

Caroline R. Corwine, Timothy A. Gessert, James R. Sites, Wyatt K. Metzger, Pat Dippo, Jingbo Li, Anna Duda, Glenn Teeter

Research output: Contribution to conferencePaperpeer-review

Abstract

Polycrystalline thin-film CdTe is one of the leading materials used in photovoltaic solar cells. One way to improve device performance and stability is through understanding how various process steps alter defect states in the CdTe layer. Low-temperature photoluminescence (PL) studies show a 1.456-eV PL peak in single-crystal CdTe that is likely due to a Cui-O Te defect complex. A similar peak, observed in as-deposited glass/SnO2:F/CdS/CdTe thin-film structures, strongly suggests a common origin. The 1.456-eV peak is also seen in a thin-film sample after performing the CdCl2 treatment needed for high efficiencies.

Original languageAmerican English
Pages197-202
Number of pages6
DOIs
StatePublished - 2005
EventThin-Film Compound Semiconductor Photovoltaics: Materials Research Society Symposium - San Francisco, California
Duration: 29 Mar 20051 Apr 2005

Conference

ConferenceThin-Film Compound Semiconductor Photovoltaics: Materials Research Society Symposium
CitySan Francisco, California
Period29/03/051/04/05

NREL Publication Number

  • NREL/CP-520-39718

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