Stable Enantiomers Displaying Thermally Activated Delayed Fluorescence: Efficient OLEDs with Circularly Polarized Electroluminescence

Angewandte Chemie - International Edition - Tập 57 Số 11 - Trang 2889-2893 - 2018
Meng Li1,2, Si‐Hua Li3, Dongdong Zhang4, Minghan Cai4, Lian Duan4, Man‐Keung Fung3, Chuan‐Feng Chen1,2
1CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China
2University of Chinese Academy of Sciences, Beijing, 100049, China
3Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, China
4Department of Chemistry, Tsinghua University, Beijing 100084, China

Tóm tắt

AbstractAromatic‐imide‐based thermally activated delayed fluorescent (TADF) enantiomers, (+)‐(S,S)‐CAI‐Cz and (−)‐(R,R)‐CAI‐Cz, were efficiently synthesized by introducing a chiral 1,2‐diaminocyclohexane to the achiral TADF unit. The TADF enantiomers exhibited high PLQYs of up to 98 %, small ΔEST values of 0.06 eV, as well as obvious temperature‐dependent transient PL spectra, thus demonstrating their excellent TADF properties. Moreover, the TADF enantiomers showed mirror‐image CD and CPL activities. Notably, the CP‐OLEDs with CPEL properties based on the TADF enantiomers not only achieved high EQE values of up to 19.7 and 19.8 %, but also displayed opposite CPEL signals with gEL values of −1.7×10−3 and 2.3×10−3, which represents the first CP‐OLEDs, based on the enantiomerically pure TADF materials, having both high efficiencies and intense CPEL.

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Tài liệu tham khảo

10.1063/1.3582917

10.1038/nphoton.2010.123

10.1063/1.123138

Kim D.-Y., 2006, J. Korean Phys. Soc., 49, 505

10.1038/nphoton.2013.176

10.1021/cr400477t

 

10.1002/1521-4095(200104)13:8<577::AID-ADMA577>3.0.CO;2-K

10.1063/1.2741603

10.1038/s41570-017-0045

10.1021/acsnano.7b07390

 

10.1021/ja971912c

10.1002/(SICI)1521-4095(200003)12:5<362::AID-ADMA362>3.0.CO;2-P

10.1021/ja037733e

10.1002/adma.201204961

10.1002/adma.201700907

10.1021/acs.jpcc.5b03386

 

10.1002/adma.201404891

10.1038/srep14912

10.1021/jacs.6b02463

10.1002/adom.201700359

10.1002/adfm.201603719

 

10.1038/nature11687

10.7567/JJAP.53.060101

 

10.1002/adma.201402532

10.1039/C6CS00368K

10.1002/adma.201605444

 

10.1038/nphoton.2014.12

10.1002/adma.201502053

10.1021/jacs.5b10950

10.1002/adma.201503225

10.1002/adma.201503782

10.1021/jacs.7b00873

10.1021/ja412294s

10.1039/C5CC04105H

10.1021/jacs.6b00850

10.1002/anie.201704435

10.1002/ange.201704435

 

10.1038/nphoton.2012.31

10.1002/adom.201600117

10.1002/adma.201604856

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Angewandte Chemie - International Edition

Tập 57 Số 11

2889-2893

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