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High color stability and CRI (>80) fluorescent white organic light-emitting diodes based pure emission of exciplex by employing merely complementary colors

Abstract

High color stability and CRI (>80) pure exciplex WOLEDs with merely complementary colors of orange- and blue-exciplex are realized by the application of spacer. The WOLEDs with three spacers structure achieves the maximum current efficiency, power efficiency and external quantum efficiency (EQE) of 16.2 cd/A, 11.3 lm/W and 7.92%, respectively. Besides, the standard white light point nearby Commission Internationale de I’Eclairage (CIE) coordinates of (0.31±0.00, 0.37±0.02) and very high color rendering index (CRI) of ~83 with two colors emitting are obtained simultaneously. The balanced emitting and natural board emission band of exciplex are responsible for the stable white light spectra and high CRI. We also find that the location and amount of spacer play a key role on the electroluminescent performance of WOLEDs and the more detailed discussions are given.

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Publication details

The article was accepted on 06 Dec 2017 and first published on 07 Dec 2017


Article type: Paper
DOI: 10.1039/C7TC05196D
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    High color stability and CRI (>80) fluorescent white organic light-emitting diodes based pure emission of exciplex by employing merely complementary colors

    B. Zhao, H. Zhang, Z. Wang, L. Gao, Y. Miao, H. Wang, Y. Hao and W. Li, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC05196D

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