有机太阳能电池
接受者
能量转换效率
分子
小分子
热稳定性
混溶性
轨道能级差
材料科学
富勒烯
化学
纳米技术
化学工程
有机化学
光电子学
物理
聚合物
凝聚态物理
生物化学
工程类
作者
Shabaz Alam,Shengyong Yang,Young Gyu Jeong,Meng Qiang Li,Geon Yeong Park,Min Kim,Jawon Lee
标识
DOI:10.1016/j.synthmet.2024.117605
摘要
Solution-processed organic solar cells (OSCs) have great promise for next-generation solar energy conversion technologies. Innovative acceptors are constantly being designed to improve device efficiency. In this work, we designed and synthesized a series of A–π–D–π–A type non-fullerene acceptor (NFA) molecules, named IB-TOT, IB-TOM, IB-IOO, and IB-IOM for their applications in OSCs. All molecules showed high thermal stability, broad photoabsorption, and relatively lower highest occupied molecular orbital (HOMO) energy levels from −5.48 eV to −5.58 eV. The optimized OSCs based on these NFAs and PTB7-Th donor deliver power conversion efficiencies (PCEs) of 8.19%, 5.50%, 2.42%, and 3.10% for IB-TOT, IB-TOM, IB-IOO, and IB-IOM molecules, respectively. The higher PCE of IB-TOT-based OSCs is attributed to their excellent miscibility and superior interpenetrating network morphology compared to the other three compounds. These results demonstrate that using the 3-ethylrhodanine acceptor unit to construct the NFA molecule is a successful approach for outstanding achievement in OSCs.
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