Shuixing Dai

TL;DR: The effects of the fluorine atom number and position on electronic properties, charge transport, film morphology, and photovoltaic properties are investigated.

TL;DR: Results show that fluorinated ITIC-Th1 exhibits redshifted absorption, smaller optical bandgap, and higher electron mobility than the nonfluorinated IT IC-Th, and nonfullerene organic solar cells (OSCs) based on fluorinatedITIC- Th1 electron acceptor and a wide-bandgap polymer donor FTAZ based on benzodithiophene and benzotriazole exhibit power conversion efficiency as high as 12.1%.

TL;DR: Based on 3TT, a fused octacylic electron acceptor (FOIC) is designed and synthesized, using strong electron-withdrawing 2-(5/6-fluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)-malononitrile as end groups, which exhibits significantly upshifted highest occupied molecular orbital level, significantly redshifted absorption, and higher mobility.

TL;DR: Three fused-ring electron acceptors with varying core size are reported and it is proposed that core engineering is a promising approach to elevate energy levels, enhance absorption and electron mobility, and finally achieve high device performance.

TL;DR: Results indicate that incorporating extended conjugation into the electron-donating fused-ring units in nonfullerene acceptors is a promising strategy for designing high-performance electron acceptors.