| Title | A Benzo[1,2-b:4,5-c ']Dithiophene-4,8-Dione-Based Polymer Donor Achieving an Efficiency Over 16% |
| Authors | Chao, Pengjie Chen, Hui Zhu, Yulin Lai, Hanjian Mo, Daize Zheng, Nan Chang, Xiaoyong Meng, Hong He, Feng |
| Affiliation | Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China South China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China |
| Keywords | ENERGY-LEVEL MODULATION SIDE-CHAIN DESIGN SOLAR-CELLS CONJUGATED POLYMER ELECTRON-ACCEPTOR CHLORINATION STRATEGY BENZODITHIOPHENE PERFORMANCE COPOLYMERS |
| Issue Date | Mar-2020 |
| Publisher | ADVANCED MATERIALS |
| Abstract | It is of great significance to develop efficient donor polymers during the rapid development of acceptor materials for nonfullerene bulk-heterojunction (BHJ) polymer solar cells. Herein, a new donor polymer, named PBTT-F, based on a strongly electron-deficient core (5,7-dibromo-2,3-bis(2-ethylhexyl)benzo[1,2-b:4,5-c ']dithiophene-4,8-dione, TTDO), is developed through the design of cyclohexane-1,4-dione embedded into a thieno[3,4-b]thiophene (TT) unit. When blended with the acceptor Y6, the PBTT-F-based photovoltaic device exhibits an outstanding power conversion efficiency (PCE) of 16.1% with a very high fill factor (FF) of 77.1%. This polymer also shows high efficiency for a thick-film device, with a PCE of approximate to 14.2% being realized for an active layer thickness of 190 nm. In addition, the PBTT-F-based polymer solar cells also show good stability after storage for approximate to 700 h in a glove box, with a high PCE of approximate to 14.8%, which obviously shows that this kind of polymer is very promising for future commercial applications. This work provides a unique strategy for the molecular synthesis of donor polymers, and these results demonstrate that PBTT-F is a very promising donor polymer for use in polymer solar cells, providing an alternative choice for a variety of fullerene-free acceptor materials for the research community. |
| URI | http://hdl.handle.net/20.500.11897/585639 |
| ISSN | 0935-9648 |
| DOI | 10.1002/adma.201907059 |
| Indexed | SCI(E) Scopus EI |
| Appears in Collections: | 深圳研究生院待认领 |
