期刊
ORGANIC ELECTRONICS
卷 42, 期 -, 页码 337-342出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2016.12.058
关键词
Dipole orientation; Chemical structure; Delayed fluorescent device; Donor; Acceptor
资金
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT, and Future Planning [2016R1A2B3008845]
The relationship between the chemical structure and the dipole orientation of thermally activated delayed fluorescent (TADF) emitters was examined by synthesizing three TADF emitters with donor and acceptor moieties at ortho-, meta-, and para-positions of a phenyl linker. Two carbazolylcarbazole donor moieties and two CN acceptor moieties were attached to the phenyl linker. The degree of dipole orientation of the three TADF emitters was in the order of para- (0.84)>meta- (0.76)>ortho- (0.72) substitution, demonstrating that extended molecular geometry by para-substitution is a key parameter to induce the dipole orientation of the TADF emitters. (C) 2016 Elsevier B.V. All rights reserved.
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