Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Effects of linking units on fused-ring electron acceptor dimers

Author affiliations

Abstract

Three fused-ring electron acceptors (SIDIC, DIDIC and TIDIC) were designed and synthesized using single bond, vinylene and acetylene units linked indaceno[3,2-b]dithiophene dimers as electron-rich cores and 3-(1,1-dicyanomethylene)-5,6-difluoro-1-indanone as electron-deficient termini. These molecules exhibit strong absorption from 550 to 900 nm with large attenuation coefficients of 1.8–2.0 × 105 M−1 cm−1 and high electron mobilities of 2.2–4.9 × 10−3 cm2 V−1 s−1. In combination with wide-bandgap polymer FTAZ as a donor, organic solar cells exhibit efficiencies of 9.3–13.1%. Effects of the linking units on optical, electronic, morphologic, and photovoltaic properties were revealed. Relative to SIDIC, vinylene-bridged DIDIC shows red-shifted absorption, while acetylene-bridged TIDIC shows blue-shifted absorption. Compared with SIDIC and DIDIC, TIDIC has a lower HOMO, higher electron mobility, and higher device efficiency.

Graphical abstract: Effects of linking units on fused-ring electron acceptor dimers

Back to tab navigation

Supplementary files

Article information


Submitted
17 Mar 2020
Accepted
24 Jun 2020
First published
25 Jun 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Effects of linking units on fused-ring electron acceptor dimers

G. Cai, Y. Xiao, M. Li, J. J. Rech, J. Wang, K. Liu, X. Lu, Z. Tang, J. Lian, P. Zeng, Y. Wang, W. You and X. Zhan, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA03058A

Social activity

Search articles by author

Spotlight

Advertisements