Highly-twisted pyrene derivative for pure-blue organic light emitting diodes
Highly-twisted pyrene derivative for pure-blue organic light emitting diodes
손선영(포항공과대학교); Xinwei Wu(경상대학교); 박광훈(경상대학교); 안형주(포항가속기연구소); 정성준(포항공과대학교); 권순기(경상대학교); 김윤희(경상대학교)
78권, 239~245쪽
초록
The newfluorescent blue host material, 1,3,6,8-tetrakis(2,5-dimethylbiphenyl-4-yl)pyrene (BD4PP), wassynthesized for pure-blue organic light-emitting diodes (OLEDs). BD4PP has highly twisted and stericstructure for efficientfluorescence, and has high thermal stability of 492 C. BD4PP host doped with 5 wt. % 4,40-bis(9-ethyl-3-carbazovinylene)-1,10-biphenyl (BCzVBi) or 5 wt. % 1,4-bis[2-(3-N-ethylcarbazoryl)-vinyl]benzene (BCzVB) showed high device efficiencies due to wide bandgap (~3.1 eV) and electron-richhost. An OLED with the BD4PP:BCzVB emitter showed higher current and external quantum efficienciesof 4.41 cd/A and 3.80% with color coordinates (0.16, 0.13) compared to those of the BD4PP:BCzVBi (3.63cd/A and 3.62%) with color coordinates (0.16, 0.11) and non-doped BD4PP (2.01 cd/A and 1.61%) with colorcoordinates (0.18, 0.13).
Abstract
The newfluorescent blue host material, 1,3,6,8-tetrakis(2,5-dimethylbiphenyl-4-yl)pyrene (BD4PP), wassynthesized for pure-blue organic light-emitting diodes (OLEDs). BD4PP has highly twisted and stericstructure for efficientfluorescence, and has high thermal stability of 492 C. BD4PP host doped with 5 wt. % 4,40-bis(9-ethyl-3-carbazovinylene)-1,10-biphenyl (BCzVBi) or 5 wt. % 1,4-bis[2-(3-N-ethylcarbazoryl)-vinyl]benzene (BCzVB) showed high device efficiencies due to wide bandgap (~3.1 eV) and electron-richhost. An OLED with the BD4PP:BCzVB emitter showed higher current and external quantum efficienciesof 4.41 cd/A and 3.80% with color coordinates (0.16, 0.13) compared to those of the BD4PP:BCzVBi (3.63cd/A and 3.62%) with color coordinates (0.16, 0.11) and non-doped BD4PP (2.01 cd/A and 1.61%) with colorcoordinates (0.18, 0.13).
- 발행기관:
- 한국공업화학회
- 분류:
- 화학공학