A Universal P‐Type Heterointerface for Inverted Perovskite Solar Cells
Abstract
Abstract Inverted perovskite solar cells with self‐assembled monolayers (SAMs) have attracted extensive attention due to their high efficiency and long‐term operational stability. However, the hole extraction at the SAMs/perovskite interface is generally less efficient with respect to the electron extraction. Here, we report the construction of a universal p‐type heterointerface between SAMs and perovskite with heterocyclic dipolar compounds imidazole hydroiodide (ImHI). We found that the strong interaction by hydrogen bonds together with formative dipole layer were observed between ImHI and perovskite. This allows more p‐type contacts with relatively small energy barriers at SAMs/perovskite heterointerfaces by downshifting the Fermi level, reducing the energy mismatch and facilitating the hole extraction. The p‐type contact enhancement was further confirmed by a series of SAMs at the perovskite buried interface. As a result, a best‐performing solar cell with a power conversion efficiency of 26.05% was achieved, with maintaining 96% of the initial efficiency for 2000 h under nitrogen‐filled glove box, 94% of the initial efficiency for 800 h at 55 °C/55% RH, and 86% of the initial efficiency for 1000 h under continuous light stress at maximum power point.
Article Details
Authors (17)
Biyun Ren
Tengfei Pan
Zihan Gu
State Key Laboratory of Flexible Electronics (LoFE) & Institute of Advanced Materials (IAM) School of Flexible Electronics (Future Technologies) Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing Jiangsu 211816 P.R. China
Xiaorong Shi
State Key Laboratory of Flexible Electronics (LoFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University (NanjingTech) , Nanjing 211816,
Xueqin Ran
Wan Yang
Meiru Duan
State Key Laboratory of Flexible Electronics (LoFE) & Institute of Advanced Materials (IAM) School of Flexible Electronics (Future Technologies) Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing Jiangsu 211816 P.R. China
Yuqian Xie
Yue Wang
He Dong
State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Department of Chemical Biology, College of Chemistry and Chemical Engineering, State Key Laboratory of Vaccines for Infectious Diseases, Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, School of Life Sciences, Faculty of Medicine and Life Sciences
Kui Xu
Beijing Frontier Research Center for Biological Structures, State Key Laboratory of Membrane Biology, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University
Zhengyi Sun
Yingdong Xia
Zhongan Li
Key Laboratory for Material Chemistry of Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P.R. China
Xingyu Gao
Lingfeng Chao
Yonghua Chen