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Article

The Electroluminescence Mechanism of Solution-Processed TADF Emitter 4CzIPN Doped OLEDs Investigated by Transient Measurements

by 1,2, 1,2,*, 1,2, 1,2, 1,2 and 1,2
1
Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
2
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jwo-Huei Jou
Molecules 2016, 21(10), 1365; https://doi.org/10.3390/molecules21101365
Received: 12 September 2016 / Revised: 8 October 2016 / Accepted: 11 October 2016 / Published: 14 October 2016
(This article belongs to the Special Issue Organic Light Emitting Diodes)
High efficiency, solution-processed, organic light emitting devices (OLEDs), using a thermally-activated delayed fluorescent (TADF) emitter, 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN), are fabricated, and the transient electroluminescence (EL) decay of the device with a structure of [ITO/PEDOT: PSS/4CzIPN 5 wt % doped 4,40-N,N0-dicarbazolylbiphenyl(CBP)/bis-4,6-(3,5-di-4-pyridylphenyl)-2-methylpyrimidine (B4PyMPM)/lithium fluoride (LiF)/Al], is systematically studied. The results shed light on the dominant operating mechanism in TADF-based OLEDs. Electroluminescence in the host–guest system is mainly produced from the 4CzIPN emitter, rather than the exciplex host materials. View Full-Text
Keywords: carrier transport and recombination; transient EL; energy transfer; TADF-based OLEDS carrier transport and recombination; transient EL; energy transfer; TADF-based OLEDS
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MDPI and ACS Style

Wang, P.; Zhao, S.; Xu, Z.; Qiao, B.; Long, Z.; Huang, Q. The Electroluminescence Mechanism of Solution-Processed TADF Emitter 4CzIPN Doped OLEDs Investigated by Transient Measurements. Molecules 2016, 21, 1365. https://doi.org/10.3390/molecules21101365

AMA Style

Wang P, Zhao S, Xu Z, Qiao B, Long Z, Huang Q. The Electroluminescence Mechanism of Solution-Processed TADF Emitter 4CzIPN Doped OLEDs Investigated by Transient Measurements. Molecules. 2016; 21(10):1365. https://doi.org/10.3390/molecules21101365

Chicago/Turabian Style

Wang, Peng, Suling Zhao, Zheng Xu, Bo Qiao, Zhijuan Long, and Qingyu Huang. 2016. "The Electroluminescence Mechanism of Solution-Processed TADF Emitter 4CzIPN Doped OLEDs Investigated by Transient Measurements" Molecules 21, no. 10: 1365. https://doi.org/10.3390/molecules21101365

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