Engineering and Technology

Stable pure-green organic light-emitting diodes toward Rec.2020 standard

X. Tang, T. Tsagaantsooj, et al.

Explore how cutting-edge research by Xun Tang, Tuul Tsagaantsooj, Tharindu P. B. Rajakaruna, Kai Wang, Xian-Kai Chen, Xiao-Hong Zhang, Takuji Hatakeyama, and Chihaya Adachi is revolutionizing organic light-emitting diodes (OLEDs). By innovatively manipulating charge carriers and excitons, they achieve remarkable color purity and longevity in device performance, pushing boundaries towards the Rec.2020 standard.

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Abstract

This work investigates the manipulation of charge carriers and excitons in organic light-emitting diodes (OLEDs) to achieve high color purity and operational lifetime. By incorporating a thermally activated delayed fluorescence (TADF) assistant molecule with a deep LUMO into a bipolar host matrix, electron trapping is achieved while maintaining efficient hole transport. This shifts the recombination zone, mitigating interfacial quenching. The optimized OLED shows low driving voltage, high stability (LT95 > 430 h at 1000 cd m⁻²), and a high CIE y coordinate of 0.69, approaching the Rec.2020 standard.

Publisher

Nature Communications

Published On

May 23, 2024

Authors

Xun Tang, Tuul Tsagaantsooj, Tharindu P. B. Rajakaruna, Kai Wang, Xian-Kai Chen, Xiao-Hong Zhang, Takuji Hatakeyama, Chihaya Adachi

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