期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 3, 期 22, 页码 5783-5794出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc01018g
关键词
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资金
- Tengfei Project from Xi'an Jiaotong University
- Fundamental Research Funds for the Central Universities
- Program for New Century Excellent Talents in University
- Ministry of Education of China [NECT-09-0651]
- Key Creative Scientific Research Team in Shaanxi Province [2013KCT-05]
- China Postdoctoral Science Foundation [20130201110034]
- National Natural Science Foundation of China [20902072]
- State Key Laboratory for Mechanical Behavior of Materials
Several truxene-based blue fluorescent emitters bearing different functional moieties and peripheral spirobifluorene groups have been successfully designed and synthesized. Through tuning the chemical structures and electronic characters of the functional moieties, both optimized molecular configuration and elevated highest occupied molecular orbital (HOMO) energy levels have been afforded to the truxene-based emitters, representing a new effective strategy for solving the problems of molecular aggregation and poor charge carrier injection/transport associated with the truxene-based blue emitters. Owing to the sophisticated strategy, the concerned emitters can furnish highly efficient non-doped blue-emitting OLEDs with a maximum current efficiency (eta(L)) of 7.41 cd A(-1), an external quantum efficiency (eta(ext)) of 4.33%, and a power efficiency (eta(P)) of 6.79 lm W-1, representing the state-of-the-art EL efficiencies ever achieved by the truxene-based blue emitters. All promising results will not only show the great potential of the concerned truxene-based blue fluorescent emitters in the field of OLEDs, but also furnish valuable clues for developing high-performance truxene-based emitters.
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