Urvashi Bothra, Robert J E Westbrook, Yun Liu, Jian Wang, Mark E Ziffer, David S Ginger
We use electroabsorption (EA) spectroscopy to probe the charge transfer (CT) character in neat films and blends of donors and acceptors of interest for organic electronic applications. In particular, we compare the CT character in two polymer donor and non-fullerene acceptor blends, including 3,9-bis(2-methylene-((3-(1,1-dicyanomethylene)-6,7-difluoro)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3- d :2',3'-d']- s -indaceno[1,2- b :5,6- b ']dithiophene (IT-4F) and 2,2'-((2 Z ,2' Z )-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]thiadiazolo[3,4- e ]thieno[2″,3″:4',5']thieno[2',3':4,5]pyrrolo[3,2- g ]thieno[2',3':4,5]thieno[3,2- b ]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1 H -indene-2,1-diylidene))dimalononitrile (Y6)...
January 26, 2024: Journal of Physical Chemistry Letters