are presented to form electroplex with their efficient white emission in a p-i-n OLED. The experimental results bear out that the interfacial phenomenon between DPVBi and Bphen originates from electroplex but not exciplex. By introducing p-i-n structure
the white OLEDs exhibits relatively high peak luminance of 9 050 cd/m
2
and power efficiency of 2.63 lm/W. Further more
the Commission Internationale De lEclairage coordinates of resulting emission varies gradually with increasing forward bias. Consequently
a consistent white color is obtained. It affords more opportunities in facilitating the fabrication process of white OLEDs.
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references
Tang C W, Vanslyke S A. Organic electroluminescent diodes [J]. Appl. Phys. Lett., 1987, 51 (12):913-915.[2] Burroughes J H, Bradley D D C, Brown A R, et al. Light-emitting diodes based on conjugated polymers [J]. Nature, 1990, 347 (6293):539-541.[3] Friend R H, Gymer R W, Holmes A B, et al. Electroluminescence in conjugated polymers [J]. Nature, 1999, 397 (6715):121-127.[4] Strukelj M, Jordan R H, Dodabalapur A. Organic multilayer white light emitting diodes [J]. J. Am. Chem. Soc., 1996, 118 (5):1213-1214.[5] Tasch S, List E J W, Ekstrǒm O, et al. Efficient white light-emitting diodes realized with new processable blends of conjugated polymers [J]. Appl. Phys. Lett., 1997, 71 (20):2883-2885.[6] Feng J, Li F, Gao W, et al. White light emission from exciplex using tris-(8-hy-dro-xy-quinoline)aluminum as chromaticity-tuning layer [J]. Appl. Phys. Lett., 2001, 78 (25):3947-3949.[7] Xie G, Meng Y, Wu F, et al. Very low turn-on voltage and high brightness tris-(8-hydroxyquinoline) aluminum-based organic light-emitting diodes with a MoOx p-doping layer [J]. Appl. Phys. Lett., 2008, 92 (9):093305-1-3.[8] Pfeiffer M, Forrest S R, Leo K. Electrophosphorescent p-i-n organic light emitting devices for very high efficiency flat panel displays [J]. Adv. Mater., 2002, 14 (22):1633-1636.[9] Jiang X Z, Register R A, Killeen K, et al. Effect of carbazole-oxadiazole excited-state complexes on the efficiency of dye-doped light-emitting diodes [J]. J. Appl. Phys., 2002, 91 (10):6717-6723.[10] Kalinowski J, Cocch M, Marco P D, et al. Impact of high electric fields on the charge recombination process in organic light-emitting diodes [J]. J. Phys. D: Appl. Phys., 2000, 33 (19):2379-2085.
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Related Author
ZHANG Ding-jun
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WU You-zhi
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YU Jun-sheng
JIANG Ya-dong
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Related Institution
甘肃省有色金属新材料省部共建国家重点实验室, 兰州理工大学 材料科学与工程学院
兰州理工大学理学院 应用物理系
School of Optoelectronic Information, State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China (UESTC)
School of Material Science and Engineering, Shanghai University