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- Title
Separation of Electrical and Optical Energy Gaps: Selectively Adjusting the Electrical and Optical Properties for a Highly Efficient Blue Emitter.
- Authors
Liu, He; Chen, Ping; Hu, Dehua; Tang, Xiangyang; Pan, Yuyu; Zhang, Huanhuan; Zhang, Wenqiang; Han, Xiao; Bai, Qing; Lu, Ping; Ma, Yuguang
- Abstract
The design concept of separation of optical and electrical bandgap for wide bandgap materials is further developed in DCzSiPI. The HOMO/LUMO levels can be tuned by incorporation of PI and DCz substituents. The tetraphenylsilane core avoids the intramolecular charge transfer from DCz to PI (DCz=dimer carbazole, PI=phenanthro[9,10- d]imidazole). The allowed transitions are found to be from HOMO−1 to LUMO providing DCzSiPI with sufficient bandgap.
- Subjects
BAND gaps; OPTICAL properties; INTRAMOLECULAR charge transfer; CARBAZOLE; IMIDAZOLES
- Publication
Chemistry - A European Journal, 2014, Vol 20, Issue 8, p2149
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201304544