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- Title
Developing Conjugated Polymers with High Electron Affinity by Replacing a CC Unit with a B ←N Unit.
- Authors
Dou, Chuandong; Ding, Zicheng; Zhang, Zijian; Xie, Zhiyuan; Liu, Jun; Wang, Lixiang
- Abstract
The key parameters of conjugated polymers are lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy levels. Few approaches can simultaneously lower LUMO and HOMO energy levels of conjugated polymers to a large extent (>0.5 eV). Disclosed herein is a novel strategy to decrease both LUMO and HOMO energy levels of conjugated polymers by about 0.6 eV through replacement of a CC unit by a B←N unit. The replacement makes the resulting polymer transform from an electron donor into an electron acceptor, and is proven by fluorescence quenching experiments and the photovoltaic response. This work not only provides an effective approach to tune the LUMO/HOMO energy levels of conjugated polymers, but also uses organic boron chemistry as a new toolbox to develop conjugated polymers with high electron affinity for polymer optoelectronic devices.
- Subjects
OPTICAL properties of conjugated polymers; ELECTRON affinity; FRONTIER orbitals; ORGANIC light emitting diode efficiency; PERFORMANCE of organic field-effect transistors
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 12, p3719
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201411973