Piezo-phototronic Effect Enhanced Efficient Flexible Perovskite Solar Cells

Junlu Sun, Qilin Hua, Ranran Zhou, Dongmei Li, Wenxi Guo, Xiaoyi Li, Guofeng Hu, Chongxin Shan, Qingbo Meng*, Lin Dong, Caofeng Pan, Zhong Lin Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)

Abstract

Tremendous work has been made recently to improve the power conversion efficiencies (PCEs) of perovskite solar cells (PSCs); the best reported value is now over 23%. However, further improving the PCEs of PSCs is challenged by material properties, device stability, and packaging technologies. Here, we report a new approach to increase the PCEs of flexible PSCs via introducing the piezo-phototronic effect in the PSCs by growing an array of ZnO nanowires on flexible plastic substrates, which act as the electron-transport layer for PSCs. From the piezo-phototronic effect, the absolute PCE was improved from 9.3 to 12.8% for flexible perovskite solar cells under a static mechanical strain of 1.88%, with a ∼40% enhancement but no change in the components of materials and device structure. A corresponding working model was proposed to elucidate the strategy to boost the performance of the PSCs. These findings present a general approach to improve PCEs of flexible PSCs without changing their fundamental materials.

Original languageEnglish
Pages (from-to)4507-4513
Number of pages7
JournalACS Nano
Volume13
Issue number4
DOIs
Publication statusPublished - 23 Apr 2019
Externally publishedYes

Keywords

  • ZnO nanowires
  • perovskite solar cells
  • piezo-phototronic effect
  • power conversion efficiency
  • strain modulated

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Sun, J., Hua, Q., Zhou, R., Li, D., Guo, W., Li, X., Hu, G., Shan, C., Meng, Q., Dong, L., Pan, C., & Wang, Z. L. (2019). Piezo-phototronic Effect Enhanced Efficient Flexible Perovskite Solar Cells. ACS Nano, 13(4), 4507-4513. https://doi.org/10.1021/acsnano.9b00125