期刊
APPLIED PHYSICS LETTERS
卷 119, 期 15, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0067935
关键词
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资金
- National Natural Science Foundation of China [52073035, U1663229]
- Natural Science Foundation of Jiangsu Province [BK20211335]
- Science and Technology Project of Changzhou University [ZMF20020429]
- Research Innovation Program for Postgraduate of Jiangsu Province [KYCX21_2792, KYCX21_2805, SJCX21_1247]
- Top-notch Academic Program Project of Jiangsu Higher Education Institutions (TAPP)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Jiangsu Provincial Talents Project of High-Level Innovation and Entrepreneurship
This study utilized a TADF host and low-concentration dinuclear platinum (III) complex to construct high-performance WOLEDs with high efficiency, CRI, CCT, and color stability.
External quantum efficiency (EQE), color rendering index (CRI), color correlated temperature (CCT), and spectral stability are key challenges for constructing high-performance white organic light-emitting diodes (WOLEDs) with a simple device structure. Herein, in order to resolve these issues, we primarily employed a thermally activated delayed fluorescence (TADF) emitter of CzAcSF as a host emitter and a dinuclear platinum (III) complex (Pt-1) as a guest emitter to construct solution-processed single-emitting layer WOLEDs at low guest concentrations of 0.75-1.50 wt. %. Thanks to their broad coverage of visible spectra, efficient energy transfer, and weak charge trap of Pt-1, the optimized WOLEDs showed an increasing EQE of 11.93% and a current efficiency of 30.76 cd/A with a high CRI of 75 and a CCT of 5210 K. Furthermore, the stable electroluminescent spectra with CIE (commission internationale de L'Eclairage) coordinate deviations of Delta x = 0.022 and Delta y = 0.015 were exhibited. This is an outstanding example for high-performance WOLEDs via employing a TADF host-sensitized low-concentration dinuclear platinum (III) complex simultaneously with high efficiency, CRI, CCT, and color stability.
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