Chiral TADF‐Active Polymers for High‐Efficiency Circularly Polarized Organic Light‐Emitting Diodes

Autor: Wen-Long Zhao, Chuan-Feng Chen, Meng Li, Yin-Feng Wang, Jin-Ming Teng, He-Ye Zhou
Rok vydání: 2021
Předmět:
Zdroj: Angewandte Chemie International Edition. 60:23619-23624
ISSN: 1521-3773
1433-7851
Popis: A strategy of chiral donor-acceptor copolymerization is proposed to develop chiral nonconjugated polymers with thermally activated delayed fluorescence (TADF). Based on this strategy, two pairs of chiral polymers ( R , R )-/( S , S )- pTpAcDPS and ( R , R )-/( S , S )- pTpAcBP were synthesized. The alternating copolymerization of the chiral donors and acceptors could effectively separate the frontier molecular orbitals, which made the polymers show small Δ E ST of 0.01-0.03 eV and efficient TADF properties. Moreover, the polymers also showed the quantum yield of up to 92% and the circularly polarized luminescence. The solution-processed circularly polarized organic light-emitting diodes showed circularly polarized electroluminescence signals with high external quantum efficiencies of up to 22.1% and maximum luminance of up to 34350 cd m -2 . This is the first report of CP-OLEDs based on chiral TADF polymer, which provides a useful and valuable guidance for the development of high-efficiency CPEL polymers.
Databáze: OpenAIRE
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