Browsing by Author "Wen, Shih-Wen"

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Efficient deep blue emitters for organic electroluminescent devices
(2007-08-20)
Ho, Meng-Huan
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Wu, Yao-Shan
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Wen, Shih-Wen
;
Chen, Teng-Ming
;
Chen, Chin H.
Highly efficient deep blue organic light emitting devices have been fabricated with a 4-(styryl)biphenyl-core based fluorescent dopant (SK-1) in the wide band gap 2-methyl-9,10-di(1-naphthyl)anthracene (alpha,alpha-MADN) host system which achieved an electroluminescence efficiency of 5.0 cd/A and an external quantum efficiency of 4.2% at 20 mA/cm(2) with a saturated blue Commission Internationale de l'Eclairage coordinates of (0.15, 0.14) and a half-decay lifetime of 8000 h at an initial brightness of 100 cd/m(2). The current efficiency and electroluminescent color of SK-1 doped devices have been shown to be essentially immune to drive current density. (C) 2007 American Institute of Physics.
Highly efficient deep blue electroluminescent devices
(2007)
Ho, Meng-Huan
;
Wu, Yao-Shan
;
Wen, Shih-Wen
;
Chen, Chin H.
;
應用化學系
A new deep blue dopant (SK-1) based on "linked" stilbene moiety has been designed and synthesized. When doped in the stable blue host material, 2-methyl-9,10-di(1-naphthyl)anthracene (alpha,alpha-MADM), the SK-1 doped blue device achieved a luminance efficiency of 5.0 cd/A with corresponding CIEx,y of (0.14, 0.14) at 20 mA/cm(2) and an external quantum efficiency of 4.2%. The performance of SK-1 doped device performance under high/low drive current density remains stable for the needs of full color OLED application.
Highly efficient deep blue organic electroluminescent device based on 1-methyl-9,10-di(1-naphthyl)anthracene
(2006-12-18)
Ho, Meng-Huan
;
Wu, Yao-Shan
;
Wen, Shih-Wen
;
Lee, Meng-Ting
;
Chen, Teng-Ming
The author have developed 2-methyl-9,10-di(1-naphthyl)anthracene (alpha,alpha-MADN) as an effective wide band gap host material for Forster energy transfer to the unsymmetrical mono(styryl)amine deep blue fluorescent dopant (BD-1). This guest/host emitting system, at the optimal doping concentration of 3%, can also increase the probability of carrier recombination near the hole-transport/emitting layer interface for the blue organic light emitting device which produces electroluminescence efficiencies of 3.3 cd/A and 1.3 lm/W and a deep blue CIEx,y color coordinates of (0.15, 0.13) that are 50% better than those of the traditional beta,beta-isomeric host (MADN) with the same dopant. (c) 2006 American Institute of Physics.
Recent Development of Blue Fluorescent OLED Materials and Devices
(2005-09-01)
Wen, Shih-Wen
;
Lee, Meng-Ting
;
Chen, Chin H.
;
應用化學系
;
友訊交大聯合研發中心
Highlights of the recent development of highly efficient and robust blue fluorescent organic light-emitting device (OLED) materials and devices are reviewed with emphasis on work accomplished at the OLED Laboratory of Display Institute, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.