期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 17, 期 39, 页码 10871-10878出版社
WILEY-BLACKWELL
DOI: 10.1002/chem.201101118
关键词
asymmetric architectures; conjugation; donor-acceptor systems; organic light-emitting diodes; lithium; phosphorescence
资金
- National Basic Research Program of China [2009CB930601]
- National Natural Science Foundation of China [20804020, 20905038, 60976019, 20974046]
- Scientific Research Foundation of Nanjing University of Posts and Telecommunications [NY210017]
- University of Jiangsu Province [CX10B 201Z]
Conjugated asymmetric donor-substituted 1,3,5-triazines (ADTs) have been synthesized by nucleophilic substitution of organolithium catalyzed by [Pd(PPh(3))(4)]. Theoretical and experimental investigations show that ADTs possess high solubility and thermostability, high fluorescent quantum yield (35%), low HOMO (-6.0 eV) and LUMO (-2.8 eV), and high triplet energy (E(T), 3.0 eV) according to the different substitution pattern of triazine. The application as host materials for blue PHOLEDs yielded a maximum current efficiency of 20.9 cd A(-1), a maximum external quantum efficiency of 9.8%, and a brightness of 9671 cd m(-2) at 5.4 V, making ADTs good candidates for optoelectronic devices.
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