Self-assembling Monolayer-Assisted Perovskite Growth Enables High-Performance Solar Cells  

作　　者：Jun Li Lisha Xie Shuncheng Yang Xinyu Tong Zhenwei Pu Mengjin Yang Yujie Wu Daobin Yang Tao Wang Ziyi Ge 

机构地区：[1]School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China [2]Zhejiang Provincial Engineering Research Centerof Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo,Zhejiang 315201,China

出　　处：《Chinese Journal of Chemistry》2024年第22期2795-2803,共9页中国化学（英文版）

基　　金：supported by the National Science Fund for Distinguished Young Scholars(21925506);National Natural Science Foundation of China(U21A20331,81903743,22209192 and 62275251);Natural Science Foundation of Zhejiang Province(LY24F040002);China Postdoctoral Science Foundation(2022M713242).

摘　　要：Inverted(p-i-n)perovskite solar cells(PSCs)are favored by researchers owing to their superior compatibility with flexible substrates and tandem device fabrication.Additionally,the hole transport layer(HTL)serves as a template for perovskite growth,which is critical for enhancing the device performance.However,the current research on how the HTL promotes perovskite crystallization is insufficient.Here,4PADCB,a self-assembled monolayer(SAM)hole transport material,was optimized as a superior template for perovskite growth through comparative analysis;accordingly,compact perovskite film with vertical growth was prepared.The better matched energy level alignment between 4PADCB and perovskite suppressed nonradiative recombination at the interface and enabled rapid hole extraction.Moreover,high-quality perovskite film growth on 4PADCB exhibited lower Young's modulus and less residual stress.By integrating 4PADCB into p-i-n PSCs,the optimal device achieved a power conversion efficiency of 24.80%,with an open-circuit voltage of 1.156 V,thus achieving the best rank among devices without perovskite post-treatment,additives,dopants,or intermediate layers.Furthermore,the unencapsulated device demonstrated exceptional thermostability and photostability under maximum power point tracking.Thus,this work provides a new understanding for the development of novel SAMs and perovskite growth,and it is expected to further improve device performance.

关 键 词：Perovskite solar cells Self-assembling monolayer Crystal growth Hole transport material Stability Energy level alignment Perovskite film Photovoltaic efficiency 

分 类 号：O61[理学—无机化学]