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<p>Perovskite solar cells (PSCs) have developed rapidly, however, the high cost of materials, inadequate device stability, and stringent manufacturing conditions still hinder their large-scale commercialization. In this study, we demonstrate that polyethylene glycol (PEG) modification of the hole transport layer enhances the efficiency (with power conversion efficiency (PCE) increasing from 8.41 to 9.01%) and stability. After continuous illumination for 16 days under unencapsulated conditions, the device maintains 89% of its initial efficiency. The incorporation of PEG reduces defects in the hole transport layer, decreases the non-radiative recombination rate of charge carriers, and minimizes the damage caused by moisture to the perovskite light-absorbing layer, thereby improving the overall performance of the PSCs. The materials used are inexpensive and easy to fabricate, and the entire process is conducted in an ambient atmosphere.</p>

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Improving the photovoltaic performance and stability of perovskite solar cells through PEG-modified hole transport layers

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • Xuanfei Kuang,
  • Yao Xiao,
  • Kun Qian,
  • Muyun Han,
  • Zongcun Liang,
  • Wuyou Fu

摘要

Perovskite solar cells (PSCs) have developed rapidly, however, the high cost of materials, inadequate device stability, and stringent manufacturing conditions still hinder their large-scale commercialization. In this study, we demonstrate that polyethylene glycol (PEG) modification of the hole transport layer enhances the efficiency (with power conversion efficiency (PCE) increasing from 8.41 to 9.01%) and stability. After continuous illumination for 16 days under unencapsulated conditions, the device maintains 89% of its initial efficiency. The incorporation of PEG reduces defects in the hole transport layer, decreases the non-radiative recombination rate of charge carriers, and minimizes the damage caused by moisture to the perovskite light-absorbing layer, thereby improving the overall performance of the PSCs. The materials used are inexpensive and easy to fabricate, and the entire process is conducted in an ambient atmosphere.