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Title: Study of Effects of Cl and Se in CdSeTe Solar Cells Using Scanning Transmission Electron Microscopy

Abstract

Solar cells based on poly-crystalline CdTe thin films are a leading candidate for low-cost conversion of solar energy due to their near optimum band gap, high absorption coefficient and ease of manufacturing. Due to non-radiative Shockley-Read-Hall (SRH) [1] recombination at grain boundaries (GBs), dislocations, and point defects, current CdTe-based solar cell efficiency appears to be limited to ~22%,[2] which is still below the theoretical limit (~30%)[3]. It is well known that CdCl2 annealing is essential for high performing CdTe solar cells due to grain recrystallization [4] and passivation of defect states within the band gap by Cl atoms.[5] Incorporating Se into CdTe to form an alloyed CdSeTe solar cells also shows a high overall efficiency.[6] Simultaneous addition of Cl and Se can further improve the efficiencies of CdTe solar cells, but yet a comprehensive experimental and theoretical study of effects of Cl and Se in CdSeTe solar cell is absent.

Authors:
 [1];  [2];  [2];  [3];  [4];  [4];  [2]; ORCiD logo [1]
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  1. Univ. of Illinois at Chicago, Chicago, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Colorado State Univ., Fort Collins, CO (United States)
Publication Date:
Research Org.:
Univ. of Illinois, Chicago, IL (United States); Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
OSTI Identifier:
1576759
Alternate Identifier(s):
OSTI ID: 1670787
Grant/Contract Number:  
EE0007545; AC02-06CH11357; AC02-05CH11231; EE0008557
Resource Type:
Accepted Manuscript
Journal Name:
Microscopy and Microanalysis
Additional Journal Information:
Journal Volume: 25; Journal Issue: S2; Conference: Microscopy and Microanalyis 2019, Portland, OR (United States); Journal ID: ISSN 1431-9276
Publisher:
Microscopy Society of America (MSA)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; STEM; CdTe

Citation Formats

Guo, Jinglong, Sen, Fatih G., Mannodi-Kannakithodi, Arun, Barnard, Edward S., Sampath, W., Munshi, Amit, Chan, Maria K. Y., and Klie, Robert F. Study of Effects of Cl and Se in CdSeTe Solar Cells Using Scanning Transmission Electron Microscopy. United States: N. p., 2019. Web. doi:10.1017/S1431927619011486.
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Guo, Jinglong, Sen, Fatih G., Mannodi-Kannakithodi, Arun, Barnard, Edward S., Sampath, W., Munshi, Amit, Chan, Maria K. Y., & Klie, Robert F. Study of Effects of Cl and Se in CdSeTe Solar Cells Using Scanning Transmission Electron Microscopy. United States. https://doi.org/10.1017/S1431927619011486
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Guo, Jinglong, Sen, Fatih G., Mannodi-Kannakithodi, Arun, Barnard, Edward S., Sampath, W., Munshi, Amit, Chan, Maria K. Y., and Klie, Robert F. Mon . "Study of Effects of Cl and Se in CdSeTe Solar Cells Using Scanning Transmission Electron Microscopy". United States. https://doi.org/10.1017/S1431927619011486. https://www.osti.gov/servlets/purl/1576759.
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@article{osti_1576759,
title = {Study of Effects of Cl and Se in CdSeTe Solar Cells Using Scanning Transmission Electron Microscopy},
author = {Guo, Jinglong and Sen, Fatih G. and Mannodi-Kannakithodi, Arun and Barnard, Edward S. and Sampath, W. and Munshi, Amit and Chan, Maria K. Y. and Klie, Robert F.},
abstractNote = {Solar cells based on poly-crystalline CdTe thin films are a leading candidate for low-cost conversion of solar energy due to their near optimum band gap, high absorption coefficient and ease of manufacturing. Due to non-radiative Shockley-Read-Hall (SRH) [1] recombination at grain boundaries (GBs), dislocations, and point defects, current CdTe-based solar cell efficiency appears to be limited to ~22%,[2] which is still below the theoretical limit (~30%)[3]. It is well known that CdCl2 annealing is essential for high performing CdTe solar cells due to grain recrystallization [4] and passivation of defect states within the band gap by Cl atoms.[5] Incorporating Se into CdTe to form an alloyed CdSeTe solar cells also shows a high overall efficiency.[6] Simultaneous addition of Cl and Se can further improve the efficiencies of CdTe solar cells, but yet a comprehensive experimental and theoretical study of effects of Cl and Se in CdSeTe solar cell is absent.},
doi = {10.1017/S1431927619011486},
journal = {Microscopy and Microanalysis},
number = S2,
volume = 25,
place = {United States},
year = {Mon Aug 05 00:00:00 EDT 2019},
month = {Mon Aug 05 00:00:00 EDT 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1017/S1431927619011486
Copyright Statement
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Figures / Tables:

Figure 1 Figure 1: Atomic HAADF image of grain boundary in CdSeTe. Figure 2 a): HAADF image of grain boundaries in CdSeTe. B) and c) are XEDS elemental mapping of Cl and Se, respectively. Figure 3 XEDS line-scan showing concentration profile of Cd, Te, Se. Figure 4 showing TRPL decay curves inmore » CdSeTe part compared with lifetime in pure CdTe part. Figure 5 Projected density of states (DOS) at dislocation core when substituted with Se and Cl.« less
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Works referenced in this record:

Ultrastructural Characterization of the Lower Motor System in a Mouse Model of Krabbe Disease
journal, December 2016

Effects of CdCl2 treatment on the recrystallization and electro-optical properties of CdTe thin films
journal, May 1998

  • Moutinho, H. R.; Al-Jassim, M. M.; Levi, D. H.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 16, Issue 3
  • DOI: 10.1116/1.581269

Solar cell efficiency tables (version 52)
journal, June 2018

  • Green, Martin A.; Hishikawa, Yoshihiro; Dunlop, Ewan D.
  • Progress in Photovoltaics: Research and Applications, Vol. 26, Issue 7
  • DOI: 10.1002/pip.3040

Electron-Hole Recombination in Germanium
journal, July 1952

Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
journal, March 1961

  • Shockley, William; Queisser, Hans J.
  • Journal of Applied Physics, Vol. 32, Issue 3, p. 510-519
  • DOI: 10.1063/1.1736034

Polycrystalline CdSeTe/CdTe Absorber Cells With 28 mA/cm 2 Short-Circuit Current
journal, January 2018

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