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- Title
Efficient Circularly Polarized Electroluminescence from Achiral Luminescent Materials**.
- Authors
Xu, Letian; Liu, Hao; Peng, Xiaoluo; Shen, Pingchuan; Tang, Ben Zhong; Zhao, Zujin
- Abstract
Circularly 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 outstanding ηexts (30.8 %), demonstrating a simple and universal avenue towards efficient CP‐EL.
- Subjects
DELAYED fluorescence; ELECTROLUMINESCENCE; LIGHT emitting diodes; PHOSPHORESCENCE; QUANTUM efficiency
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 20, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202300492