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Issue 33, 2018
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Highly efficient crystalline organic light-emitting diodes

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Crystalline organic light-emitting diodes (OLEDs) have attracted continuous attention due to their capacity to withstand high current densities. Although crystalline OLEDs are of great potential for achieving electrically pumped organic lasers, the poor performance of these devices impedes their application. Therefore, the improvement of the performance of crystalline OLEDs is highly desirable. Here, this paper reports a para-sexiphenyl (p-6P)/tris(8-hydroxyquinoline) aluminum (Alq3) OLED with high efficiency based on high-quality crystalline films. The p-6P/Alq3 crystalline OLED exhibits a high external quantum efficiency (EQE) of 1.44% at ∼5000 cd m−2, which is >100 times more than other reported crystalline OLEDs. At high driving current density, the results show that the p-6P/Alq3 crystalline OLED exhibits better survivability than a p-6P/Alq3 amorphous OLED. This work provides a prototype of highly-efficient crystalline OLEDs, making crystalline OLEDs one of the choices to achieve electrically pumped organic lasers in the future.

Graphical abstract: Highly efficient crystalline organic light-emitting diodes

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Article information

22 Jun 2018
20 Jul 2018
First published
20 Jul 2018

J. Mater. Chem. C, 2018,6, 8879-8884
Article type

Highly efficient crystalline organic light-emitting diodes

X. Yang, X. Feng, J. Xin, P. Zhang, H. Wang and D. Yan, J. Mater. Chem. C, 2018, 6, 8879
DOI: 10.1039/C8TC03069C

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