TY - JOUR
T1 - Universal polymeric bipolar hosts for highly efficient solution-processable blue and green thermally activated delayed fluorescence OLEDs
AU - Hwang, Jinhyo
AU - Kim, Chae Yeong
AU - Kang, Hyunchul
AU - Jeong, Ji Eun
AU - Woo, Han Young
AU - Cho, Min Ju
AU - Park, Sungnam
AU - Choi, Dong Hoon
N1 - Publisher Copyright:
© The Royal Society of Chemistry.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12/7
Y1 - 2020/12/7
N2 - In this study, two polymeric host materials, P(NmCP) and P(mCP), were synthesized, and high-performing sky-blue and green thermally activated delayed fluorescence organic light-emitting diodes (TADF-OLEDs) were achieved. The simple structure polymer host was designed by inserting a pyridine group into the core of P(NmCP) and an electron-donating phenyl group into the core of P(mCP). The two polymeric hosts exhibited high triplet energies (T1 = 3.04 eV for P(NmCP) and 3.05 eV for P(mCP)), which were sufficiently high to realize blue and green TADF-OLEDs. In brief, solution-processed OLEDs with an emissive layer bearing P(NmCP) as a bipolar electron host exhibited remarkable performance with a maximum current efficiency (CE), power efficiency (PE), and external quantum efficiency (EQE) of 70.36 cd A-1, 63.15 lm W-1, and 20.07%, respectively, in the green-emitting device. In the blue-emitting device, we obtained a maximum CE, PE, and EQE of 27.13 cd A-1, 22.30 lm W-1, and 10.70%, respectively. The polymer design with such a high T1 value is believed to be the cornerstone for implementing high-performance TADF-OLEDs via solution processing in the future. This journal is
AB - In this study, two polymeric host materials, P(NmCP) and P(mCP), were synthesized, and high-performing sky-blue and green thermally activated delayed fluorescence organic light-emitting diodes (TADF-OLEDs) were achieved. The simple structure polymer host was designed by inserting a pyridine group into the core of P(NmCP) and an electron-donating phenyl group into the core of P(mCP). The two polymeric hosts exhibited high triplet energies (T1 = 3.04 eV for P(NmCP) and 3.05 eV for P(mCP)), which were sufficiently high to realize blue and green TADF-OLEDs. In brief, solution-processed OLEDs with an emissive layer bearing P(NmCP) as a bipolar electron host exhibited remarkable performance with a maximum current efficiency (CE), power efficiency (PE), and external quantum efficiency (EQE) of 70.36 cd A-1, 63.15 lm W-1, and 20.07%, respectively, in the green-emitting device. In the blue-emitting device, we obtained a maximum CE, PE, and EQE of 27.13 cd A-1, 22.30 lm W-1, and 10.70%, respectively. The polymer design with such a high T1 value is believed to be the cornerstone for implementing high-performance TADF-OLEDs via solution processing in the future. This journal is
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U2 - 10.1039/d0tc04366d
DO - 10.1039/d0tc04366d
M3 - Article
AN - SCOPUS:85097051470
VL - 8
SP - 16048
EP - 16056
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
SN - 2050-7526
IS - 45
ER -