Strengthened Charge‐Selective Perovskite/SAM Heterocontact for Efficient and Durable Perovskite Solar Cells via Interfacial Reconfiguration
Abstract
ABSTRACT Hole‐selective self‐assembled molecular (SAM) layer plays a critical role in driving the optoelectronic performance of inverted perovskite solar cells (PSCs). Nevertheless, the inherent aggregation of SAMs at the buried heterocontact that causes large energy loss and severe instability, strongly hinders PSCs’ practical deployment. Herein, we propose an effective in situ strategy of reconfiguring a robust buried hole‐selective heterocontact between SAM and perovskite to promote charge extraction with improved energetics, while suppressing the formation of interfacial voids and defects. We also demonstrate that thermally activated polymerization network densely covers the SAM at the heterocontact, minimizing underlying electrode exposure and preventing upper perovskite decomposition. Simultaneously, perovskite film directly grown on network exhibits a higher crystallinity, along with releasing the residual stress. Consequently, the PSC achieves an impressive efficiency of 26.87% for 1.57 eV bandgap cells and one of the highest fill factors of 87.04% reported so far. Encouragingly, the modified device features an excellent thermal and operational stability, significantly advancing the progress of PSCs toward industrialization.
Article Details
Authors (22)
Xiaoyun Wan
School of Physics East China Normal University Shanghai China
Hao Wang
Division of Quantitative Sciences, Department of Oncology Johns Hopkins University School of Medicine Baltimore Maryland USA
Haixin Chen
Kai Jiang
Department of Pharmacy, The First Affiliated Hospital of the University of Science and Technology of China, and State Key Laboratory of Precision and Intelligent Chemistry
Jiyuan Chen
Di Li
State Key Laboratory of Biopharmaceutical Preparation and Delivery, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Haidian District, Beijing 100190, P. R. China
Xuelin Wang
Ziheng Zhang
Zhijie Wang
Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry
Menghui Jia
State Key Laboratory of Precision Spectroscopy
Shuo Zhang
Ruihao Tang
School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai China
Jinxiang Wang
Lixuan Kan
School of Chemistry and Chemical Engineering
Zaifei Ma
Bo Li
Yongbo Yuan
School of Physics and Electronics Central South University Changsha China
Shaobing Xiong
School of Physics East China Normal University Shanghai China
Yefeng Yao
Shanghai Key Laboratory of Magnetic Resonance East China Normal University Shanghai China
Jianxin Tang
Junhao Chu
State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics
Qinye Bao
School of Physics East China Normal University Shanghai China