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RISS 인기검색어
- 검색키워드
- 저자 : Bangdong Ding (검색결과 3 건)
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Deep blue organic light emitting diode based on anthracene derivative as a dopant
Bangdong Ding,Wenqing Zhu,Xueyin Jiang,Zhilin Zhang 한국물리학회 2008 Current Applied Physics Vol.8 No.5
This letter presents a deep blue organic light emitting diode which was fabricated by using 9,10-di(2-naphthyl)anthracene as a dopant and 4,4'-N,N'-dicarbazole-biphenyl as a host. The Commission Internationale de l’Eclairage coordinates of (0.1516, 0.0836) were achieved in the cell, which is very close to the National Television Standards Committee standard of (0.14, 0.08). Meanwhile, maximum luminance over 6500 cd/cm2 and maximum current efficiency of 3.5 cd/A were also obtained. This letter presents a deep blue organic light emitting diode which was fabricated by using 9,10-di(2-naphthyl)anthracene as a dopant and 4,4'-N,N'-dicarbazole-biphenyl as a host. The Commission Internationale de l’Eclairage coordinates of (0.1516, 0.0836) were achieved in the cell, which is very close to the National Television Standards Committee standard of (0.14, 0.08). Meanwhile, maximum luminance over 6500 cd/cm2 and maximum current efficiency of 3.5 cd/A were also obtained.
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Pure blue emission from undoped organic light emitting diode based on anthracene derivative
Bangdong Ding,Wenqing Zhu,Xueyin Jiang,Zhilin Zhang 한국물리학회 2008 Current Applied Physics Vol.8 No.5
This paper presents organic light emitting diodes (OLEDs) which were fabricated by using undoped 9,10-di(2-naphthyl)anthracene (ADN) as the emitting layer, N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-amine (TPD) as the hole transporting layer, and one of tris-(8-hydroxy-quinolinato) aluminum (Alq3), 4,7-diphenyl-1,10-phenanthroline (Bphen) and 2-tert-butylphenyl-5-biphenyl- 1,3,4-oxadiazole (PBD) as the electron transporting layer. By optimization for the thickness of device, efficient pure blue organic light emitting diodes were obtained, which is attributed to the synergy of both the hole transporting layer and the electron transporting layer. This paper presents organic light emitting diodes (OLEDs) which were fabricated by using undoped 9,10-di(2-naphthyl)anthracene (ADN) as the emitting layer, N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-amine (TPD) as the hole transporting layer, and one of tris-(8-hydroxy-quinolinato) aluminum (Alq3), 4,7-diphenyl-1,10-phenanthroline (Bphen) and 2-tert-butylphenyl-5-biphenyl- 1,3,4-oxadiazole (PBD) as the electron transporting layer. By optimization for the thickness of device, efficient pure blue organic light emitting diodes were obtained, which is attributed to the synergy of both the hole transporting layer and the electron transporting layer.
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Red organic light-emitting devices based on a pentacene derivative
Xiangdong Luo,Hong Gu,Bangdong Ding,Li Wang,Xiaowen Zhang,Wenqing Zhu,Xueyin Jiang,Zhilin Zhang 한국물리학회 2011 Current Applied Physics Vol.11 No.3
A more steric hindrance pentacene derivative, 6,13-di-(3,5-diphenyl) phenylpentacene (PDT) is synthesized in this experiment. And this manuscript presents the red emission organic light-emitting devices based on tris-(8-hydroxy- quinolinato) aluminum (Alq_3) co-doped with 6,13-di-(3,5-diphenyl) phenylpentacene (PDT), and 5,6,11,12-tetraphenylnaphthacene (rubrene). By measuring and analyzing the intensity of red emission and Commission Internationale de l’Eclairage (CIE) coordinates of the devices with different rubrene concentrations and thicknesses of active layer, an optimized structure of [ITO/TPD (50 nm)/Alq_3: 3mol%PDT:1mol%rubrene(60 nm)/Bphen(25 nm)/LiF/Al] is obtained. The experimental results suggest that rubrene assists energy transfer from Alq3 to PDT in composite of Alq_3:PDT:rubrene,which results in relatively pure red emission. A red emission with chromaticity coordinates (x = 0.61,y = 0.37) is also obtained with the emitting layer of [Alq_3:3 mol% PDT:1 mol% rubrene] within the driving current density range of 12―120 mA/cm^2. A maximum luminance efficiency of 2.4 cd/A is measured at current density of 120 mA/cm^2 and high brightness of 2894 cd/m^2.
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