10-di-(2-naphthyl)anthracene(ADN) and red dopant 4-(dicyanomethylene)-2-t-butyl-6(1
1
7
7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) and assist blue dopant 2
5
8
11-tetra-tertbutylperylene(TBPe) was fabricated
and 4
4'
4-tris triphenylamine (2TNATA)
4
4'-bis biphenyl (NPB)
tris-(8-hydroxyquinoline) aluminum (Alq
3
) were used as hole injection
hole transportation
electron transportation materials
respectively. The results show that ADN doped with DCJTB can realize red emission as well
and the use of TBPe as assist dopant effectively enhance the device luminous efficiency
yet almost have no effects on CIE coordinates. Additionally
devices with 2% TBPe(mass fraction) appear optimum luminous efficiency and highest temperature increase rate.
关键词
Keywords
references
Hamada Y J, Kanno H, Tsujioka T, et al. Red organic light-emitting diodes using an emitting assist dopant
. Appl. Phys. Lett., 1999,75(12):1682(1-3).
Feng J, Li F, Gao W B, et al. Improvement of efficiency and color purity utilizing two-step energy transfer for red organic light emitting devices
.Appl. Phys. Lett., 2002,81(16):2935(1-3).
Chen J S, Ma D G. Improved color purity and efficiency by a coguest emitter system in doped red light-emitting devices
.Journal of Luminescence,2007,122-123:636-638.
Tse S C, So S K, Yeung M Y, et al. The role of charge transfer integral in determining and engineering the carrier mobilities of 9,10-di(2-naphthyl)anthracene compounds
. Chem. Phys. Lett.,2006,422:354-357.
Shi J M,Tang C W. Anthracene derivations for stable blue emitting organic light electroluminescence devices
.Appl. Phys. Lett., 2002,80(17):3201(1-3).
Chung S J, Lee J H, Jeong J, et al. Substrate thermal conductivity effect on heat dissipation and lifetime improvement of organic light emitting diodes