机制(生物学)
有机太阳能电池
材料科学
三元运算
接受者
工作(物理)
化学物理
电荷(物理)
纳米技术
光伏系统
化学
计算机科学
物理
电气工程
热力学
工程类
程序设计语言
量子力学
作者
Mingyang Li,Yi‐Qi Pan,Guang‐Yan Sun,Yun Geng
标识
DOI:10.1021/acs.jpclett.1c02413
摘要
For ternary organic solar cells (T-OSCs), introducing the third component (D2) can significantly enhance the efficiency of cell while still maintaining easy fabrication. However, it brings difficulty in physical understanding of the fundamental mechanism because of the more complicated photophysical processes in T-OSCs. Accordingly, how the guest donor D2 regulates the charge transfer mechanism was explored in theory using three T-OSCs containing two donors and an acceptor. The results point out that larger differences in molecular weight and/or backbone between D2 and the host donor D1 cause different charge transfer mechanisms, which hardly provide a coexisting charge transfer path. Besides, strong absorption capacity of D2 with a high oscillator strength would produce favorable regulation of the charge transfer mechanism. Therefore, this work clarifies the influence of D2 on the charge transfer mechanism in T-OSCs, which suggests that the method of improving the power conversion efficiency cannot be generalized but rather must be tailored to specific conditions.
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