马万里教授、袁建宇研究员及其合作者在Angew. Chem. Int. Ed.上发表论文

发布时间:2021-12-22访问量:10设置

题目:

Combined Precursor Engineering and Grain Anchoring Leading to MA-Free, Phase-Pure, and Stable α-Formamidinium Lead Iodide Perovskites for Efficient Solar Cells

作者:

Xufeng Ling,1,2,+ Hongwei Zhu,2,+ Weidong Xu,3,+ Cheng Liu,1 Linfeng Pan,4 Dan Ren,2 Jianyu Yuan,1,* Bryon W. Larson,5 Carole Grӓtzel,2 Ahmad R. Kirmani,5 Olivier Ouellette,2 Anurag Krishna,4 Jianguo Sun,1 Chunyang Zhang,2 Youyong Li,1 Shaik M. Zakeeruddin,2 Jing Gao,2 Yuhang Liu, 2,* James R. Durrant,3,6Joseph M. Luther,5 Wanli Ma,1,* and Michael Grätzel2,*

单位:

1 Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123 (China)
2
Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Station 6, 1015 Lausanne (Switzerland)
3
Department of Chemistry and Centre for Processable Electronics
Imperial College, London, SW7 2AZ (UK)

4 Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Station 6, Lausanne CH-1015 (Switzerland)

5 Chemistry & Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401 (USA)

6 SPECIFIC IKC, College of Engineering, Swansea University, Bay Campus,Fabian Way, Swansea SA1 8EN (UK)

摘要:

α-Formamidinium lead iodide (α-FAPbI3) is one of the most promising candidate materials for high-efficiency and thermally stable perovskite solar cells (PSCs) owing to its outstanding optoelectrical properties and high thermal stability. However, achieving a stable form of α-FAPbI3 where both the composition and the phase are pure is very challenging. Herein, we report on a combined strategy of precursor engineering and grain anchoring to successfully prepare methylammonium (MA)-free and phase-pure stable α-FAPbI3 films. The incorporation of volatile FA-based additives in the precursor solutions completely suppresses the formation of non-perovskite δ-FAPbI3 during film crystallization. Grains of the desired α-phase are anchored together and stabilized when 4-tert-butylbenzylammonium iodide is permeated into the α-FAPbI3 film interior via grain boundaries. This cooperative scheme leads to a significantly increased efficiency close to 21 % for FAPbI3 perovskite solar cells. Moreover, the stabilized PSCs exhibit improved thermal stability and maintained ≈90 % of their initial efficiency after storage at 50 °C for over 1600 hours.

影响因子:

12.959

分区情况:

一区

链接:

https://onlinelibrary.wiley.com/doi/10.1002/anie.202112555


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