Narrowband Emissive TADF Conjugated Polymers towards Highly Efficient Solution-Processible OLEDs

Tao Wang; Yang Zou; Zhongyan Huang; Nengquan Li; Jingsheng Miao; Chuluo Yang

doi:10.1002/anie.202211172

Narrowband Emissive TADF Conjugated Polymers towards Highly Efficient Solution-Processible OLEDs

Angew Chem Int Ed Engl. 2022 Nov 14;61(46):e202211172. doi: 10.1002/anie.202211172. Epub 2022 Oct 17.

Authors

Tao Wang^{1

2}, Yang Zou¹, Zhongyan Huang¹, Nengquan Li¹, Jingsheng Miao¹, Chuluo Yang¹

Affiliations

¹ Shenzhen Key Laboratory of New Information Display and Storage Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
² College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.

PMID: 36123308
DOI: 10.1002/anie.202211172

Abstract

Thermally activated delayed fluorescence (TADF) conjugated polymers usually show broad emission spectra due to the large structure relaxation, which is not desirable for high-quality organic light-emitting diode (OLED) displays. Herein, through attaching multiple resonance (MR) induced emitting moiety as pendant onto the polycarbazole backbone, TADF conjugated polymers with narrowband emission are demonstrated. The obtained conjugated polymers exhibit typical TADF characteristics with narrowband emission with full-width at half-maximums (FWHMs) of 33-43 nm. The solution-processed devices employing these polymers as emissive layers realize excellent performances with maximum external quantum efficiency (EQE) of 17.5 %, emission peak at 496 nm and FWHM of 34 nm.

Keywords: Conjugated Polymer; Multiple Resonance; Narrowband Emission; Organic Light-Emitting Diode; Thermally Activated Delayed Fluorescence.

Abstract

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