You are welcome to attend Zhaoyi Yin's MASc oral exam supervised by Professor Li
Abstract:
The organic solar cells (OSCs), a branch of the third-generation solar cell as a viable future energy resource has received a lot of attention in lab and industry today. The OSCs have advantages of low cost, light weight, flexible, and roll-to-roll printing for large area manufacture. The bulk heterojunction structure (BHJ) is wildly accepted in the active layer of OSCs, which is a blend film of donor polymer and acceptor material for efficient charge transfer. Recently, the combination of non-fullerene acceptors (NFAs) with wide-bandgap donor polymers as active layer has come to the forefront of OSC research, which has achieved high power conversion efficiency (PCE) over 18%.
In this work, we will introduce donor polymers in D-A copolymer structure, based on benzodithiophene (BDT) or polythiophene (PT) as the donor backbone unit combining with electron-withdrawing sidechains as the acceptor unit. Two novel series of polymers, thiophene-vinyl-thiophene easter (TVT-ester) polymer and thiophene-alkyloxime (TO) polymer based on different electron-withdrawing sidechains, were designed, synthesized, and characterized to function as wide-bandgap donor polymers in organic solar cells.