Abstract
Here, new polymers named PBTT-Cn(n= 3, 4, or 5) have been designed based on carboxylate-functionalized thieno[3,2-b]thiophene units. The electroluminescence external quantum efficiencies (EQEEL) of pristine PBTT-C4 and C5 films are over 1 × 10−2, which are among the highest results for OPV materials. Through combination with BTP-eC9, the PBTT-C4-based film showed a high EQEELof 6 × 10−4and theVnon-radlossis 0.19 eV. As a result, a high open-circuit voltage of 0.89 V and a satisfactory PCE of 15% were recorded in the PBTT-C4-based OPV cells.
Original language | English |
---|---|
Pages (from-to) | 9132-9135 |
Number of pages | 4 |
Journal | Chemical Communications |
Volume | 57 |
Issue number | 72 |
DOIs | |
Publication status | Published - 2021 Sep 16 |
ASJC Scopus subject areas
- Catalysis
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Chemistry(all)
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry