Sulfone-Embedded Heterocyclic Narrowband Emitters with Strengthened Molecular Rigidity and Suppressed High-Frequency Vibronic Coupling.

Jiang, Simin; Yu, Yue; Li, Deli; Chen, Zijian; He, Yanmei; Li, Mengke; Yang, Guo-Xi; Qiu, Weidong; Yang, Zhihai; Gan, Yiyang; Lin, Jianying; Ma, Yuguang; Su, Shi-Jian

Jiang, Simin; Yu, Yue; Li, Deli; Chen, Zijian; He, Yanmei; Li, Mengke; Yang, Guo-Xi; Qiu, Weidong; Yang, Zhihai; Gan, Yiyang; Lin, Jianying; Ma, Yuguang; Su, Shi-Jian.

Afiliación

Jiang S; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Yu Y; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Li D; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Chen Z; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
He Y; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Li M; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Yang GX; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Qiu W; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Yang Z; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Gan Y; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Lin J; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Ma Y; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.
Su SJ; State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Wushan Road 381, Guangzhou, 510640, P. R. China.

Angew Chem Int Ed Engl ; 62(16): e202218892, 2023 Apr 11.

Article en En | MEDLINE | ID: mdl-36815469

ABSTRACT

ABSTRACT

Sulfone-embedded heterocyclics are of great interest in organic light-emitting diodes (OLEDs), however, exploring highly efficient narrowband emitters based on sulfone-embedded heterocyclics remains challenging. Herein, five emitters with different sulfur valence state and molecular rigidity, namely tP, tCPD, 2tCPD, tPD and tPT, are thoroughly analysed. With restricted twisting of flexible peripheral phenyl by strengthening molecular rigidity, molecular emission spectra can be enormously narrowed. Further, introducing the sulfone group with bending vibration in low-frequency region that suppresses high-frequency vibration, sharp narrow full-widths at half-maximum of 28 and 25ânm are achieved for 2tCPD and tPD, respectively. Maximum external quantum efficiencies of 22.0 % and 27.1 % are successfully realized for 2tCPD- and tPD-based OLED devices. These results offer a novel design strategy for constructing narrowband emitters by introducing sulfone group into a rigid molecular framework.

Palabras clave

Molecular Rigidity; Narrowband Emission; Organic Light-Emitting Diodes; Sulfone; Vibronic Coupling

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