出版日期：2025-01-20 00:00:00

著者：Kun-Mu Lee; Chia-Hui Lin; Chia-Chi Chang; Ting-Yu Yang; Wei-Hao Chiu; Wei-Chen Chu;Ya-Ho Chang; Sie-Rong Li; Shih-I Lu; Hsiao-Chi Hsieh; Kang-Ling Liau; Chia Hui Hu;Chih-Hung Chen; Yun-Shuo Liu; Wei-Chun Chou; Mandy M. Lee; Shih-Sheng Sun;Yu-Tai Tao; Yan-Duo Lin

著錄名稱、卷期、頁數：Advanced Science 12(3), 2410666

摘要：The structural modification of hole-transporting materials (HTMs) is an effective strategy for enhancing photovoltaic performance in perovskite solar cells (PSCs). Herein, a series of dithienopyran (DTP)-based HTMs (Me-H, Ph-H, CF3-H, CF3-mF, and CF3-oF) is designed and synthesized by substituting different functional groups on the DTP unit and are used fabricating PSCs. In comparison with Me-H having two methyl substituents on the dithienopyrano ring, the Ph-H having two phenyl substituents on the ring exhibits higher PCEs. Notably, the incorporation of trifluoromethyl groups in CF3-H endows the molecule with a larger dipole moment, deeper HOMO energy level, better film morphology, closer molecular stacking, more efficient defect-passivation, enhanced hydrophobicity, and better photovoltaic performance when compared with the Ph-H counterpart. Furthermore, the HTMs of CF3-mF and CF3-oF, which feature fluorine-substituted triphenylamine, demonstrated excellent film-forming properties, more suitable energy levels, enhanced charge mobility, and improved passivation of the buried interface between HTMs and perovskite. As a result, PSCs employing CF3-mF and CF3-oF gave impressive PCEs of 23.41 and 24.13%, respectively. In addition, the large-area (1.00 cm2) PSCs based on CF3-oF achieved a PCE of 22.31%. Moreover, the PSCs devices with CF3 series HTMs exhibited excellent long-term stability under different conditions.

關鍵字：dithienopyran-based derivatives; fluorine-substituted small molecule; hole-transporting materials; long-term stability; perovskite solar cells; photo-energy conversion

語言：en

ISSN：2198-3844

期刊性質：國外

收錄於：SCI

審稿制度：否

國別：DEU

出版型式：電子版