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Flexible Cu2ZnSn(S,Se)4 solar cells with over 10% efficiency and methods of enlarging the cell area

Author

Listed:
  • Kee-Jeong Yang

    (Convergence Research Center for Solar Energy, DGIST)

  • Sammi Kim

    (Convergence Research Center for Solar Energy, DGIST)

  • Se-Yun Kim

    (Convergence Research Center for Solar Energy, DGIST)

  • Kwangseok Ahn

    (Convergence Research Center for Solar Energy, DGIST)

  • Dae-Ho Son

    (Convergence Research Center for Solar Energy, DGIST)

  • Seung-Hyun Kim

    (Convergence Research Center for Solar Energy, DGIST)

  • Sang-Ju Lee

    (Convergence Research Center for Solar Energy, DGIST)

  • Young-Ill Kim

    (Convergence Research Center for Solar Energy, DGIST)

  • Si-Nae Park

    (Convergence Research Center for Solar Energy, DGIST)

  • Shi-Joon Sung

    (Convergence Research Center for Solar Energy, DGIST)

  • Dae-Hwan Kim

    (Convergence Research Center for Solar Energy, DGIST)

  • Temujin Enkhbat

    (Incheon National University)

  • JunHo Kim

    (Incheon National University)

  • Chan-Wook Jeon

    (Yeungnam University)

  • Jin-Kyu Kang

    (Convergence Research Center for Solar Energy, DGIST)

Abstract

For kesterite copper zinc tin sulfide/selenide (CZTSSe) solar cells to enter the market, in addition to efficiency improvements, the technological capability to produce flexible and large-area modules with homogeneous properties is necessary. Here, we report a greater than 10% efficiency for a cell area of approximately 0.5 cm2 and a greater than 8% efficiency for a cell area larger than 2 cm2 of certified flexible CZTSSe solar cells. By designing a thin and multi-layered precursor structure, the formation of defects and defect clusters, particularly tin-related donor defects, is controlled, and the open circuit voltage value is enhanced. Using statistical analysis, we verify that the cell-to-cell and within-cell uniformity characteristics are improved. This study reports the highest efficiency so far for flexible CZTSSe solar cells with small and large areas. These results also present methods for improving the efficiency and enlarging the cell area.

Suggested Citation

  • Kee-Jeong Yang & Sammi Kim & Se-Yun Kim & Kwangseok Ahn & Dae-Ho Son & Seung-Hyun Kim & Sang-Ju Lee & Young-Ill Kim & Si-Nae Park & Shi-Joon Sung & Dae-Hwan Kim & Temujin Enkhbat & JunHo Kim & Chan-Wo, 2019. "Flexible Cu2ZnSn(S,Se)4 solar cells with over 10% efficiency and methods of enlarging the cell area," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10890-x
    DOI: 10.1038/s41467-019-10890-x
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