4-Tert-butylpyridine-assisted low-cost and soluble copper phthalocyanine as dopant-free hole transport layer for efficient Pb-and Sn-based perovskite solar cells

• 作者: Chunling Li Jing Cao Jun Yin Qing Liang Ruiqin He Yu Tang
• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2020,（8）
• 所属期刊栏目: ARTICLES
• 页码范围: 1053-1058
• 页数: 6页
• 语种: 英文

摘要

The preparation of suitable hole transport material (HTM) is critical to the performance and stability of perovskite solar cells (PSCs) with low-cost.Herein,a mass producible and soluble copper phthalocyanine decorated with butoxy donor groups (CuPc-OBu) was designed as HTM and prepared by a facile two-step synthetic route.To generate high quality HTM film,4-tertbutylpyridine (tBP) was doped into CuPc-OBu to prepare the film and then removed by annealing.Such a tBP-assisted strategy resulted in the best efficiency of the PSCs with lead trihalide perovskite up to 19.0％ (small-area of 0.1 cm2) and 10.1％ (the active area of 8.0 cm2 for the module device).And the best efficiency of the tin-based PSCs with CuPc-OBu reached to 6.9％.More importantly,the device with CuPc-OBu as HTM revealed the remarkably enhanced stability.This work provides a new strategy to improve the film-quality of free-doping HTMs and enhance the efficiency and stability of Pb-and Sn-based PSCs with low-cost.