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Polymer Poly (Ethylene Oxide) Additive for High-Stability All-Inorganic CsPbI 3−x Br x Perovskite Solar Cells

Author

Listed:
  • Chun-Yang Chen

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

  • Fang-Hui Zhang

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

  • Jin Huang

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

  • Tao Xue

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

  • Xiao Wang

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

  • Chao-Fan Zheng

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

  • Hao Wang

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

  • Chun-Liang Jia

    (School of Electronic Information and Artificial Intelligence, Shaanxi University of Science &Technology, Xi’an 710021, China)

Abstract

All-inorganic CsPbI 3−x Br x perovskite solar cells (PSCs) are becoming increasingly mature due to their excellent optoelectronic properties. However, because of the poor environmental stability of the perovskite material, the device is susceptibly decomposed when exposed to moisture, high temperature, and high illumination. Therefore, a critical task is to address the problem of poor long-term stability in the environment, which serves as a significant obstacle impeding the commercialization of perovskite solar cells. This article introduces the incorporation of PEO into all-inorganic CsPbI 3−x Br x perovskites with an advantageous thermal stability. PEO acts as a passivating agent near the grain boundary, and its high viscosity characteristics effectively improve the film-forming properties, leading to a substantial reduction in defects and to improving the surface uniformity. In addition, the grain boundaries that serve as water and oxygen penetration channels are filled, resulting in a substantial improvement in device stability. With 7.5 mg/mL PEO doping into CsPbI 3−x Br x , the unencapsulated device maintained its original power conversion efficiency of 98% after being placed in a dark environment of 40% humidity and 25 °C for 10 days. Using PEO effectively enhanced the performance of the devices, with the highest PCE reaching 10.95%, significantly improving environmental stability.

Suggested Citation

  • Chun-Yang Chen & Fang-Hui Zhang & Jin Huang & Tao Xue & Xiao Wang & Chao-Fan Zheng & Hao Wang & Chun-Liang Jia, 2023. "Polymer Poly (Ethylene Oxide) Additive for High-Stability All-Inorganic CsPbI 3−x Br x Perovskite Solar Cells," Energies, MDPI, vol. 16(23), pages 1-12, November.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:23:p:7849-:d:1291126
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    2. Dongqin Bi & Chenyi Yi & Jingshan Luo & Jean-David Décoppet & Fei Zhang & Shaik Mohammed Zakeeruddin & Xiong Li & Anders Hagfeldt & Michael Grätzel, 2016. "Polymer-templated nucleation and crystal growth of perovskite films for solar cells with efficiency greater than 21%," Nature Energy, Nature, vol. 1(10), pages 1-5, October.
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