文献类型：期刊文献

英文题名：Terminal group engineering of A-DA′D-A non-fullerene acceptors as electron transport materials for efficient inverted perovskite solar cells

作者：Zhao, Shengdong Gong, Yufei Pan, Fei Guo, Junjiang Xie, Chengcheng Lu, Chenxing Li, Xiaojun Xu, Jingchao Lv, Menglan

第一作者：Zhao, Shengdong

通信作者：Pan, F[1];Lv, ML[1];Li, XJ[2];Pan, F[3];Xu, JC[4]

机构：[1]Guizhou Univ, Engn Res Ctr Energy Convers & Storage Technol Guiz, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China;[2]Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China;[3]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550025, Peoples R China;[4]Dongfang Elect Hangzhou Innovat Inst Co Ltd, Hangzhou, Peoples R China

第一机构：Guizhou Univ, Engn Res Ctr Energy Convers & Storage Technol Guiz, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Engn Res Ctr Energy Convers & Storage Technol Guiz, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China;corresponding author), Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550025, Peoples R China;corresponding author), Dongfang Elect Hangzhou Innovat Inst Co Ltd, Hangzhou, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2026

卷号：16

期号：29

起止页码：26756-26763

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20262120743106);Scopus(收录号：2-s2.0-105039121417);WOS:【SCI-EXPANDED(收录号:WOS:001769633700001)】；

基金：This work was supported by the National Natural Science Foundation of China (52463019, 52373175, 22569004), the High-level Innovative Talents Foundation of Guizhou Province (QKHPTRC-GCC[2023]-024), Natural Science Foundation of Guizhou Province (QKHPTRC-CXTD[2023]005), Science and Technology Innovation Team of Higher Education Department of Guizhou Province (QJJ[2023]053) and Starting Research Fund of Guizhou Institute of Technology (2023GCC025).

语种：英文

外文关键词：Carrier transport - Chlorine - Chlorine compounds - Electron transport properties - Nanostructured materials - Solar cell efficiency

摘要：Conventional fullerene-based electron transport materials (ETMs) suffer from limited tunability and suboptimal interfacial contact, hindering further efficiency improvements in inverted perovskite solar cells (PSCs). In this study, two non-fullerene small molecules with chlorinated thiophene terminal groups Cl24-TCl and difluorinated phenyl terminal groups Cl24-F were employed as ETMs in inverted PSCs to investigate the key factors by which different terminal groups influence device performance. Although the Cl24-TCl ETM exhibits a more polarized electrostatic potential distribution and a larger dipole moment, the Cl24-F ETM shows more favorable energy level alignment and interfacial contact, which effectively reduce interfacial charge recombination losses. In addition, Cl24-F displays more compact pi-pi stacking, resulting in higher electron mobility and conductivity, thereby promoting more efficient interfacial charge transport. Consequently, inverted PSCs based on Cl24-F achieve a champion efficiency of 24.18%, which is significantly higher than that of devices based on Cl24-TCl (13.02%). This work uncovers the key factors governing device performance and guides the design of high-performance non-fullerene ETMs.