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

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.

SUBMITTER: Yang KJ 

PROVIDER: S-EPMC6609618 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Flexible Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> solar cells with over 10% efficiency and methods of enlarging the cell area.

Yang Kee-Jeong KJ   Kim Sammi S   Kim Se-Yun SY   Ahn Kwangseok K   Son Dae-Ho DH   Kim Seung-Hyun SH   Lee Sang-Ju SJ   Kim Young-Ill YI   Park Si-Nae SN   Sung Shi-Joon SJ   Kim Dae-Hwan DH   Enkhbat Temujin T   Kim JunHo J   Jeon Chan-Wook CW   Kang Jin-Kyu JK  

Nature communications 20190704 1

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 cm<sup>2</sup> and a greater than 8% efficiency for a cell area larger than 2 cm<sup>2</sup> of certified flexible CZTSSe solar cells. By designing a thin and multi-layered p  ...[more]

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