杂原子
钙钛矿(结构)
材料科学
电子传输链
电子迁移率
噻吩
光化学
化学
光电子学
结晶学
有机化学
戒指(化学)
生物化学
作者
Qiwen Guo,Quan-Song Li
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-07-10
卷期号:6 (14): 7433-7444
标识
DOI:10.1021/acsaem.3c00776
摘要
In perovskite solar cells (PSCs), the electron transport layer (ETL) plays an important part in the extraction and transport of photogenerated electrons in the perovskite layer. Electron transport materials (ETMs) also modify the interface between the perovskite layer and the electrode, reducing charge recombination. In this work, a series of ETMs based on the experimentally synthesized N,N′-bis(1-indanyl) naphthalene-1,4,5,8-tetracarboxylic diimide (NDI-ID) [Kwon, O. P. et al. Adv. Funct. Mater. 2020, 30, 1905951] were designed by introducing thiophene sulfur and pyrrole nitrogen atoms in the N-substituent side chain. The effects of heteroatom engineering on electronic properties, transfer, and interfacial properties were systematically studied. We found that the designed ETMs have improved the electronic properties. More significantly, compared to the NDI-ID molecule, the electron mobility of the ETMs is significantly increased, even exceeding 26 times. Especially, NDI-ID-1S-m exhibits remarkably stronger interfacial interactions with MAPbI3 and enhanced electron extraction capability compared with NDI-ID. Our results demonstrate that heteroatom-regulated NDI small molecules are potential ETMs and offer helpful guidance for the design of durable and efficient components for PSCs.
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