Details

Autor(en) / Beteiligte

• Hui, Wei
• Chao, Lingfeng
• Lu, Hui
• Xia, Fei
• Wei, Qi
• Su, Zhenhuang
• Niu, Tingting
• Tao, Lei
• Du, Bin
• Li, Deli
• Wang, Yue
• Dong, He
• Zuo, Shouwei
• Li, Bixin
• Shi, Wei
• Ran, Xueqin
• Li, Ping
• Zhang, Hui
• Wu, Zhongbin
• Ran, Chenxin
• Song, Lin
• Xing, Guichuan
• Gao, Xingyu
• Zhang, Jing
• Xia, Yingdong
• Chen, Yonghua
• Huang, Wei

Titel

Stabilizing black-phase formamidinium perovskite formation at room temperature and high humidity

Ist Teil von

• Science (American Association for the Advancement of Science), 2021-03, Vol.371 (6536), p.1359-1364

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2021

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• The stabilization of black-phase formamidinium lead iodide (α-FAPbI ) perovskite under various environmental conditions is considered necessary for solar cells. However, challenges remain regarding the temperature sensitivity of α-FAPbI and the requirements for strict humidity control in its processing. Here we report the synthesis of stable α-FAPbI , regardless of humidity and temperature, based on a vertically aligned lead iodide thin film grown from an ionic liquid, methylamine formate. The vertically grown structure has numerous nanometer-scale ion channels that facilitate the permeation of formamidinium iodide into the lead iodide thin films for fast and robust transformation to α-FAPbI A solar cell with a power-conversion efficiency of 24.1% was achieved. The unencapsulated cells retain 80 and 90% of their initial efficiencies for 500 hours at 85°C and continuous light stress, respectively.