Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
location: home > paper >
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High Efficiency Red and White Organic Light Emitting Diodes based Exciplex Host
DOI:
10.16355/j.cnki.issn1007-9432tyut.2022.01.003
Received:
Accepted:
| Corresponding author | Institute | |
| WANG Chao | Huawei Technologies Co., Ltd. |
abstract:
High efficiency monochrome red and white OLEDs were realized through the control of dopant concentration by employing the exciplex mCP:POT2T as host. The red OLED based on exciplex host achieved the maximum external quantum efficiency (EQE) of 21%, a 44% increase compared with traditional CBP single host. Further, the white OLED with maximum current efficiency, power efficiency and EQE of 41.2 cd/A, 43.1 lm/W, and 19.5%, respectively, was obtained by decreasing the dopant concentration to achieve the simultaneous emission of exciplex host and dopant emitter. The results demonstrate that the barrierfree charge injection, balanced charge transport/recombination, and high triplet excition harvest are responsible for the high efficiency.
Keywords:
OLED; exciplex; host; white; reverse intersystem crossing