Affiliation:
1. State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of Technology Guangzhou 510640 China
2. School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong Kong Shenzhen Guangdong 518172 China
Abstract
AbstractCircularly polarized electroluminescence (CP‐EL) is generally produced in organic light‐emitting diodes (OLEDs) based on special CP luminescent (CPL) materials, while common achiral luminescent materials are rarely considered to be capable of direct producing CP‐EL. Herein, near ultraviolet CPL materials with high photoluminescence quantum yields and good CPL dissymmetry factors are developed, which can induce blue to red CPL for various achiral luminescent materials. Strong near ultraviolet CP‐EL with the best external quantum efficiencies (ηexts) of 9.0 % and small efficiency roll‐offs are achieved by using them as emitters for CP‐OLEDs. By adopting them as hosts or sensitizers, commercially available yellow‐orange achiral phosphorescence, thermally activated delayed fluorescence (TADF) and multi‐resonance (MR) TADF materials can generate intense CP‐EL, with high dissymmetry factors and outstandingηexts (30.8 %), demonstrating a simple and universal avenue towards efficient CP‐EL.
Funder
National Natural Science Foundation of China
Basic and Applied Basic Research Foundation of Guangdong Province
Cited by
2 articles.
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