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Band tailing and efficiency limitation in kesterite solar cells

Publication ,  Journal Article
Gokmen, T; Gunawan, O; Todorov, TK; Mitzi, DB
Published in: Applied Physics Letters
September 2, 2013

We demonstrate that a fundamental performance bottleneck for hydrazine processed kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cells with efficiencies reaching above 11% can be the formation of band-edge tail states, which quantum efficiency and photoluminescence data indicate is roughly twice as severe as in higher-performing Cu(In,Ga)(S,Se)2 devices. Low temperature time-resolved photoluminescence data suggest that the enhanced tailing arises primarily from electrostatic potential fluctuations induced by strong compensation and facilitated by a lower CZTSSe dielectric constant. We discuss the implications of the band tails for the voltage deficit in these devices. © 2013 AIP Publishing LLC.

Duke Scholars

Published In

Applied Physics Letters

DOI

ISSN

0003-6951

Publication Date

September 2, 2013

Volume

103

Issue

10

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

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Gokmen, T., Gunawan, O., Todorov, T. K., & Mitzi, D. B. (2013). Band tailing and efficiency limitation in kesterite solar cells. Applied Physics Letters, 103(10). https://doi.org/10.1063/1.4820250
Gokmen, T., O. Gunawan, T. K. Todorov, and D. B. Mitzi. “Band tailing and efficiency limitation in kesterite solar cells.” Applied Physics Letters 103, no. 10 (September 2, 2013). https://doi.org/10.1063/1.4820250.
Gokmen T, Gunawan O, Todorov TK, Mitzi DB. Band tailing and efficiency limitation in kesterite solar cells. Applied Physics Letters. 2013 Sep 2;103(10).
Gokmen, T., et al. “Band tailing and efficiency limitation in kesterite solar cells.” Applied Physics Letters, vol. 103, no. 10, Sept. 2013. Scopus, doi:10.1063/1.4820250.
Gokmen T, Gunawan O, Todorov TK, Mitzi DB. Band tailing and efficiency limitation in kesterite solar cells. Applied Physics Letters. 2013 Sep 2;103(10).

Published In

Applied Physics Letters

DOI

ISSN

0003-6951

Publication Date

September 2, 2013

Volume

103

Issue

10

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 02 Physical Sciences