A Homopolymer of Xanthenoxanthene-Based Polycyclic Heteroaromatic for Efficient and Stable Perovskite Solar Cells

Yaohang Cai, Yuyan Zhang, Jing Zhang, Xun Pan, Mats R. Andersson, Peng Wang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Highly efficient perovskite solar cells typically rely on spiro-OMeTAD as a hole transporter, achieving a 25.7 % efficiency record. However, these cells are susceptible to harsh 85 °C conditions. Here, we present a peri-xanthenoxanthene-based semiconducting homopolymer (p-TNI2) with matched energy levels and a high molecular weight, synthesized nearly quantitatively through facile oxidative polymerization. Compared to established materials, p-TNI2 excels in hole mobility, morphology, modulus, and waterproofing. Implementing p-TNI2 as the hole transport layer results in n-i-p perovskite solar cells with an initial average efficiency of 24.6 %, rivaling 24.4 % for the spiro-OMeTAD control cells under identical conditions. Furthermore, the p-TNI2-based cells exhibit enhanced thermostability at 85 °C and operational robustness.

Original languageEnglish
Article numbere202315814
Number of pages10
JournalAngewandte Chemie - International Edition
Volume63
Issue number5
Early online date7 Dec 2023
DOIs
Publication statusPublished - 25 Jan 2024

Keywords

  • Conjugated Polymer
  • Hole Transport
  • Modulus
  • Polycyclic Heteroaromatic
  • Solar Cell

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