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Title: Recombination by grain-boundary type in CdTe

Abstract

We conducted cathodoluminescence (CL) spectrum imaging and electron backscatter diffraction on the same microscopic areas of CdTe thin films to correlate grain-boundary (GB) recombination by GB “type.” We examined misorientation-based GB types, including coincident site lattice (CSL) Σ = 3, other-CSL (Σ = 5–49), and general GBs (Σ > 49), which make up ∼47%–48%, ∼6%–8%, and ∼44%–47%, respectively, of the GB length at the film back surfaces. Statistically averaged CL total intensities were calculated for each GB type from sample sizes of ≥97 GBs per type and were compared to the average grain-interior CL intensity. We find that only ∼16%–18% of Σ = 3 GBs are active non-radiative recombination centers. In contrast, all other-CSL and general GBs are observed to be strong non-radiative centers and, interestingly, these GB types have about the same CL intensity. Both as-deposited and CdCl{sub 2}-treated films were studied. The CdCl{sub 2} treatment reduces non-radiative recombination at both other-CSL and general GBs, but GBs are still recombination centers after the CdCl{sub 2} treatment.

Authors:
;  [1]; ; ; ;  [1]; ;  [2]
  1. National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401 (United States)
  2. Department of Physics & Astronomy, University of Toledo, Toledo, Ohio 43606 (United States)
Publication Date:
OSTI Identifier:
22489520
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 118; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CADMIUM CHLORIDES; CADMIUM TELLURIDES; CATHODOLUMINESCENCE; DIFFRACTION; GRAIN BOUNDARIES; LENGTH; RECOMBINATION; SPECTRA; SURFACES; THIN FILMS

Citation Formats

Moseley, John, Ahrenkiel, Richard K., Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, Metzger, Wyatt K., Moutinho, Helio R., Guthrey, Harvey L., Al-Jassim, Mowafak M., Paudel, Naba, and Yan, Yanfa. Recombination by grain-boundary type in CdTe. United States: N. p., 2015. Web. doi:10.1063/1.4926726.
Moseley, John, Ahrenkiel, Richard K., Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, Metzger, Wyatt K., Moutinho, Helio R., Guthrey, Harvey L., Al-Jassim, Mowafak M., Paudel, Naba, & Yan, Yanfa. Recombination by grain-boundary type in CdTe. United States. https://doi.org/10.1063/1.4926726
Moseley, John, Ahrenkiel, Richard K., Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, Metzger, Wyatt K., Moutinho, Helio R., Guthrey, Harvey L., Al-Jassim, Mowafak M., Paudel, Naba, and Yan, Yanfa. Tue . "Recombination by grain-boundary type in CdTe". United States. https://doi.org/10.1063/1.4926726.
@article{osti_22489520,
title = {Recombination by grain-boundary type in CdTe},
author = {Moseley, John and Ahrenkiel, Richard K. and Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401 and Metzger, Wyatt K. and Moutinho, Helio R. and Guthrey, Harvey L. and Al-Jassim, Mowafak M. and Paudel, Naba and Yan, Yanfa},
abstractNote = {We conducted cathodoluminescence (CL) spectrum imaging and electron backscatter diffraction on the same microscopic areas of CdTe thin films to correlate grain-boundary (GB) recombination by GB “type.” We examined misorientation-based GB types, including coincident site lattice (CSL) Σ = 3, other-CSL (Σ = 5–49), and general GBs (Σ > 49), which make up ∼47%–48%, ∼6%–8%, and ∼44%–47%, respectively, of the GB length at the film back surfaces. Statistically averaged CL total intensities were calculated for each GB type from sample sizes of ≥97 GBs per type and were compared to the average grain-interior CL intensity. We find that only ∼16%–18% of Σ = 3 GBs are active non-radiative recombination centers. In contrast, all other-CSL and general GBs are observed to be strong non-radiative centers and, interestingly, these GB types have about the same CL intensity. Both as-deposited and CdCl{sub 2}-treated films were studied. The CdCl{sub 2} treatment reduces non-radiative recombination at both other-CSL and general GBs, but GBs are still recombination centers after the CdCl{sub 2} treatment.},
doi = {10.1063/1.4926726},
url = {https://www.osti.gov/biblio/22489520}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 2,
volume = 118,
place = {United States},
year = {2015},
month = {7}
}