Issue 33, 2018

Highly efficient crystalline organic light-emitting diodes

Abstract

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

Supplementary files

Article information

Article type
Communication
Submitted
22 iyn 2018
Accepted
20 iyl 2018
First published
20 iyl 2018

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

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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