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Issue 15, 2018
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Non-doped white organic light-emitting diodes with superior efficiency/color stability by employing ultra-thin phosphorescent emitters

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Abstract

Using a simple method employing ultra-thin phosphorescent emitters into bis(3-(9,9-dimethyl-9,10-dihydroacridine)phenyl)sulfone (mSOAD) based on zig-zag acridine/sulfone derivative, high efficiency and high color stability of non-doped white organic light-emitting diodes (WOLEDs) are realized. After optimization of the location and quantity of the ultra-thin emitters, maximum current efficiency, power efficiency and external quantum efficiency (EQE) of the WOLEDs of 31.9 cd A−1, 30.4 lm W−1 and 17.3%, respectively, are achieved. The stable white spectra are also obtained with the Commission Internationale de I’Eclairage (CIE) coordinates of (0.469 ± 0.008, 0.382 ± 0.004) from 4 V to 8 V. We find that efficient confinement to carriers and excitons has a key role; the location and quantity of ultra-thin emitters also have a large effect on device performance.

Graphical abstract: Non-doped white organic light-emitting diodes with superior efficiency/color stability by employing ultra-thin phosphorescent emitters

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Publication details

The article was received on 09 Jan 2018, accepted on 12 Mar 2018 and first published on 13 Mar 2018


Article type: Paper
DOI: 10.1039/C8TC00132D
Citation: J. Mater. Chem. C, 2018,6, 4250-4256
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    Non-doped white organic light-emitting diodes with superior efficiency/color stability by employing ultra-thin phosphorescent emitters

    B. Zhao, H. Zhang, Z. Wang, Y. Miao, Z. Wang, J. Li, H. Wang, Y. Hao and W. Li, J. Mater. Chem. C, 2018, 6, 4250
    DOI: 10.1039/C8TC00132D

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