共发射极
对偶(语法数字)
激子
有机太阳能电池
材料科学
光电子学
形态学(生物学)
纳米技术
物理
量子力学
复合材料
艺术
文学类
生物
遗传学
聚合物
作者
Rulin Hao,Xia Hao,Xumeng Wang,Wei Han,Jingwei Huang,Fei Wang,Yujia Zhang,Hua Tan,Mengbing Zhu,Xin Song,Qunping Fan,Weiguo Zhu
标识
DOI:10.1016/j.cej.2024.151067
摘要
Extending exciton lifetime and optimizing active-layer morphology simultaneously to advance power conversion efficiency (PCE) of organic solar cells (OSCs) still encounter great challenges by conventional additive strategies. Herein, to address these issues, a multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitter of BNS-H1 containing heteroatom-embedded polycyclic aromatic hydrocarbon is innovatively served as a dual-functional solid additive (DFSA) in OSCs. The primary studies on the PM6:Y6 system indicate that BNS-H1 plays an exceptional dual-functional role in promoting π-π stacking of Y6 component and optimizing active-layer morphology. Meanwhile, the steady/transient photoluminescence spectra and transient photocurrent measurements further reveal that incorporating BNS-H1 with the system enhances emission of PM6 component, extend exciton lifetime and diffusion distance. Consequently, four types of binary OSCs demonstrate a notable improvement in PCE processed by 1.0 wt% BNS-H1. Specifically, the BNS-H1-treated OSCs with PM6:Y6 and PM6:BTP-eC9 systems achieve outstandingly increasing PCEs of 17.4% and 18.8% compared to their BNS-H1-free control devices, respectively. Furthermore, device stability of the BNS-H1-treated PM6:Y6 devices is significantly enhanced. Notably, the approaching 19% efficiency is one of the highest PCEs in the reported non-volatile additives treated binary OSCs. Our work highlights the significant potential of MR-TADF emitter as a DFSA in OSCs for boosting PCEs.
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