Pang, Shuting published the artcileA Facile Synthesized Polymer Featuring B-N Covalent Bond and Small Singlet-Triplet Gap for High-Performance Organic Solar Cells, COA of Formula: C34H40F2S4, the publication is Angewandte Chemie, International Edition (2021), 60(16), 8813-8817, database is CAplus and MEDLINE.
High-efficiency organic solar cells (OSCs) largely rely on polymer donors. Herein, we report a new building block BNT and a relevant polymer PBNT-BDD featuring B-N covalent bond for application in OSCs. The BNT unit was synthesized in only 3 steps, leading to the facile synthesis of PBNT-BDD. When blended with a nonfullerene acceptor Y6-BO, PBNT-BDD afforded a power conversion efficiency (PCE) of 16.1% in an OSC, comparable to the benzo[1,2-b:4,5-b’]dithiophene (BDT)-based counterpart. The nonradiative recombination energy loss of 0.19 eV was afforded by PBNT-BDD. PBNT-BDD also exhibited weak crystallinity and appropriate miscibility with Y6-BO, benefitting of morphol. stability. The singlet-triplet gap (ΔEST) of PBNT-BDD is as low as 0.15 eV, which is much lower than those of common organic semiconductors (≥0.6 eV). As a result, the triplet state of PBNT-BDD is higher than the charge transfer (CT) state, which would suppress the recombination via triplet state effectively.
Angewandte Chemie, International Edition 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 C34H40F2S4, COA of Formula: C34H40F2S4.
Referemce:
https://en.wikipedia.org/wiki/Benzothiophene,
Benzothiophene | C8H6S – PubChem