Shang, Ziya published the artcileNon-equivalent D-A copolymerization strategy towards highly efficient polymer donor for polymer solar cells, HPLC of Formula: 1514905-24-8, the publication is Science China: Chemistry (2021), 64(6), 1031-1038, database is CAplus.
D-A copolymerization is a broadly utilized mol. design strategy to construct high efficiency photovoltaic materials for polymer solar cells (PSCs), and all the D-A copolymer donors reported till now are the alternate D-A copolymers with equal D-and A-units. Here, we first propose a non-equivalent D-A copolymerization strategy with unequal D- and A-units, and develop three novel non-equivalent D-A copolymer donors (PM6-D1, PM6-D2 and PM6-D3 with D/A unit ratio of 1.1:0.9, 1.2:0.8 and 1.3:0.7, resp.) by inserting more D units into the alternate D-A copolymer PM6 backbone to finely tune the physicochem. and photovoltaic properties of the polymers. The three non-equivalent D-A copolymers show the down-shifted HOMO (HOMO) energy levels, higher hole mobility, higher degree of mol. self-assembly and higher mol. crystallinity with the increase of D-unit ratio in comparison with the alternate D-A copolymer PM6. As a result, all the three non-equivalent D-A copolymer-based PSCs with Y6 as acceptor achieve improved power conversion efficiency (PCE) with higher Voc, larger Jsc and higher FF simultaneously. Particularly, the PM6-D1:Y6 based PSC achieved a high PCE of 17.71%, which is significantly higher than that (15.82%) of the PM6:Y6 based PSC and is one of the highest performances in the binary PSCs.
Science China: Chemistry published new progress about 1514905-24-8. 1514905-24-8 belongs to benzothiophene, auxiliary class Organic Photo-Voltaic Materials, OPV,BDT Donors, name is 4,8-Bis(5-(2-ethylhexyl)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b’]dithiophene, and the molecular formula is C6H4ClNO2, HPLC of Formula: 1514905-24-8.
Referemce:
https://en.wikipedia.org/wiki/Benzothiophene,
Benzothiophene | C8H6S – PubChem