Journal
DYES AND PIGMENTS
Volume 149, Issue -, Pages 399-406Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2017.10.020
Keywords
Orgainc light-emitting diode; Aggregation-induced emission; Benzoselenadiazole; Tetraphenylethene; Triphenylamine
Funding
- National Natural Science Foundation of China [51763013, 51403088, 61565003]
- China Postdoctoral Science Foundation [2016M592111]
- Postdoctoral Science Foundation of Jiangxi Province [2016KY05]
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Several tetraphenylethene and triphenylamine decorated donor-acceptor (D-A) benzoselenadiazole derivatives with aggregation-induced emission (ATE) features were synthesized and characterized. The photophysical, thermal, electrochemical and electroluminescent (EL) properties, as well as the AIE property of the resulting luminogens are discussed. All the luminogens are soluble in common organic solvents and show high thermal stability with a Td of 399-460 degrees C. The absolute photoluminescence quantum yield in the solid state ranged from 14.2% to 36.5%. The D-A structures of TPE-Se-TPE, TPA-Se-TPE and TPA-Se-TPA enable them to have aggregation -caused quenching (ACQ) plus aggregation-induced emission enhancement (AIEE) effects dominated by the twisted intramolecular charge-transfer (TICT) and restriction of intramolecular rotations (RIR), respectively. The best device performances were obtained from TPA-Se-TPE with a maximal luminous efficiency of 2.91 cd/A and the maximal brightness is 5855 cd/m(2). This is the first report of benzoselenadiazole-based fluorophore with an AIR feature for organic electronics application.
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