Bottom‐Up Regulation of Perovskite Growth and Energetics via Oligoether Functionalized Self‐Assembling Molecules for High‐Performance Solar Cells
Abstract
Abstract Self‐assembling molecules (SAMs) are widely used as interfacial layers to optimize the surface properties of nickel oxides (NiO x ) in inverted perovskite solar cells (PSCs). However, less attention is paid to the effect of SAMs on the regulation of perovskite growth and energetics. Here, based on the donor‐acceptor molecular backbone, an oligoether chain is introduced with different chain lengths to endow two novel SAMs, namely, EPA and MEPA, with good capability of bottom‐up regulation of perovskite formation and energetics. Compared to the model SAM MPA, EPA and MEPA can render NiO x with better coverage and conductivity. Moreover, the oligoether chain‐containing SAMs are able to assist the formation of perovskite film with ordered growth, high crystallization, and importantly well‐matched energy level alignment at the top surface, especially for MEPA. Consequently, a remarkably high efficiency of 25.50% is realized for NiO x /MEPA‐based PSCs along with good device stability, which can maintain 90% of the initial efficiency under ISOS‐L‐1 conditions over 1260 h.
Article Details
Authors (17)
Xiaozhen Huang
Taiyu Wang
Wenjie Chen
Zhengye Wang
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P.R. China
Zhiye Lin
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P.R. China
Di Wang
Xiaofeng Li
Diwei Zhang
Shidong Cai
Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Key Laboratory of Flexible Electronics, College of Physics and Energy, Strait Laboratory of Flexible Electronics (SLoFE) Fujian Normal University Fuzhou Fujian 350117 P.R. China
Xiafeng He
Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Key Laboratory of Flexible Electronics, College of Physics and Energy, Strait Laboratory of Flexible Electronics (SLoFE) Fujian Normal University Fuzhou Fujian 350117 P.R. China
Jie Gao
State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials
Dong Wei
Hongfang Du
State Key Laboratory of Flexible Electronics & Shaanxi Institute of Flexible Electronics Northwestern Polytechnical University Xi'an China
Youchao Wei
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 P.R. China
Yue Wang
Mingwei An
Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Key Laboratory of Flexible Electronics, College of Physics and Energy, Strait Laboratory of Flexible Electronics (SLoFE) Fujian Normal University Fuzhou Fujian 350117 P.R. China
Yang Wang