상세 보기
- Shin, Eunju;
- Sung, Baeksang;
- Joo, Chul Woong;
- Kim, Dasol;
- Kim, Jinhwa;
- ... Kim, Yun-Hi;
- 외 1명
WEB OF SCIENCE
6SCOPUS
6초록
Herein we report two novel host materials, viz., 2-(dibenzo [b,d]furan-2-yl)indolo [3,2,1-jk]carbazole (ICz-DBF) and 3-(indolo [3,2,1-jk]carbazol-2-yl)furo [2,3-b:5,4-b']dipyridine (ICz-PFP), for fabricating highly stable and efficient organic light-emitting diodes (OLEDs). Green phosphorescent OLEDs (PhOLEDs) based on ICz-DBF and ICz-PFP exhibited less efficiency roll-off than those based on 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) host, and especially, the ICz-DBF-based device achieved a high external quantum efficiency (EQE) of 20.5 %. Bipolar hosts composed of indolocarbazole (ICz) exhibit strong molecular rigidity, high triplet energy, and fast electron transport properties; therefore, they act as acceptors, but dibenzofuran (DBF) and dipyridofuran (PFP) substitutions endow them with controlled electron-donating characteristics. The bipolar properties of the new host materials were demonstrated by single-carrier device analysis, confirming the effectiveness of our research strategy for developing hosts for high-quality OLEDs. © 2024 Elsevier Ltd
키워드
- 제목
- Novel indolocarbazole-based bipolar host materials for fabricating green phosphorescent organic light-emitting diodes with high efficiency and low roll-off
- 저자
- Shin, Eunju; Sung, Baeksang; Joo, Chul Woong; Kim, Dasol; Kim, Jinhwa; Lee, Jonghee; Kim, Yun-Hi
- 발행일
- 2024-07
- 유형
- Article
- 권
- 226