Electron favorable bipolar host for efficient blue OLEDs

Tien-Lung Chiu; Chia-Hsun Chen; Bo-Yen Lin; Yi-Hsin Lan; Man-kit Leung; Jiun-Haw Lee

doi:10.1117/12.2579745

5 March 2021 Electron favorable bipolar host for efficient blue OLEDs

Tien-Lung Chiu, Chia-Hsun Chen, Bo-Yen Lin, Yi-Hsin Lan, Man-kit Leung, Jiun-Haw Lee

Proceedings Volume 11708, Advances in Display Technologies XI; 117080O (2021) https://doi.org/10.1117/12.2579745
Event: SPIE OPTO, 2021, Online Only

Abstract

In this study, we report a bistriazoles derivative to be the wide bandgap host for blue emitters. In particular, this bistriazoles derivative possesses a wide bandgap of 4.0 eV and bipolar carrier transportation behavior. In addition, its bipolar behavior is classified to the rare case of electron-favorable bipolar carrier transportation, which was identified by the time-of-flight measurement and unipolar device. The electron mobility is little faster than hole one, which benefits the adjustment of carrier balance in the emitting layer. Employing to be the host of blue phosphorescent OLED, the device exhibits a high-efficiency performance with a 30.2%EQE.

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Citation Download Citation

Tien-Lung Chiu, Chia-Hsun Chen, Bo-Yen Lin, Yi-Hsin Lan, Man-kit Leung, and Jiun-Haw Lee "Electron favorable bipolar host for efficient blue OLEDs", Proc. SPIE 11708, Advances in Display Technologies XI, 117080O (5 March 2021); https://doi.org/10.1117/12.2579745

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