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Hydrazine-processed Ge-substituted CZTSe solar cells

Publication ,  Journal Article
Bag, S; Gunawan, O; Gokmen, T; Zhu, Y; Mitzi, DB
Published in: Chemistry of Materials
December 11, 2012

The p-type Cu2ZnSn(SxSe1-x)4 (with x ≈ 0; CZTSe) thin-film solar cell absorber, made from earth-abundant elements, was substituted with Ge using a hydrazine-based mixed particle-solution approach for the film deposition. The crystallographic unit cell parameters of the absorber layer decrease with gradual incorporation of Ge. A solar cell fabricated from a 40% Ge-substituted absorber showed a 9.1% power conversion efficiency, a higher open-circuit voltage, and a wider band gap compared with the device based on the unsubstituted absorber layer. This result shows the possibility of substituting, using the hydrazine-processing approach, the metal site of CZTSe with Ge for further device optimization. One area for further improvement in the substituted absorber layer devices includes reduction of a ZnSe secondary phase, which was apparent in the higher-Ge-content films. © 2012 American Chemical Society.

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Published In

Chemistry of Materials

DOI

EISSN

1520-5002

ISSN

0897-4756

Publication Date

December 11, 2012

Volume

24

Issue

23

Start / End Page

4588 / 4593

Related Subject Headings

  • Materials
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
 

Citation

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Bag, S., Gunawan, O., Gokmen, T., Zhu, Y., & Mitzi, D. B. (2012). Hydrazine-processed Ge-substituted CZTSe solar cells. Chemistry of Materials, 24(23), 4588–4593. https://doi.org/10.1021/cm302881g
Bag, S., O. Gunawan, T. Gokmen, Y. Zhu, and D. B. Mitzi. “Hydrazine-processed Ge-substituted CZTSe solar cells.” Chemistry of Materials 24, no. 23 (December 11, 2012): 4588–93. https://doi.org/10.1021/cm302881g.
Bag S, Gunawan O, Gokmen T, Zhu Y, Mitzi DB. Hydrazine-processed Ge-substituted CZTSe solar cells. Chemistry of Materials. 2012 Dec 11;24(23):4588–93.
Bag, S., et al. “Hydrazine-processed Ge-substituted CZTSe solar cells.” Chemistry of Materials, vol. 24, no. 23, Dec. 2012, pp. 4588–93. Scopus, doi:10.1021/cm302881g.
Bag S, Gunawan O, Gokmen T, Zhu Y, Mitzi DB. Hydrazine-processed Ge-substituted CZTSe solar cells. Chemistry of Materials. 2012 Dec 11;24(23):4588–4593.
Journal cover image

Published In

Chemistry of Materials

DOI

EISSN

1520-5002

ISSN

0897-4756

Publication Date

December 11, 2012

Volume

24

Issue

23

Start / End Page

4588 / 4593

Related Subject Headings

  • Materials
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences