High contrast flexible organic light emitting diodes under ambient light without sacrificing luminous efficiency

2012 ◽  
Vol 13 (5) ◽  
pp. 826-832 ◽  
Author(s):  
Sei-Yong Kim ◽  
Jeong-Hwan Lee ◽  
Jae-Hyun Lee ◽  
Jang-Joo Kim
Keyword(s):  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Ambient Light ◽  
High Contrast ◽  
Light Emitting ◽  
Organic Light

High contrast blue organic light-emitting diodes using inorganic multilayers of Al and ZnSe

2012 ◽  
Vol 37 (24) ◽  
pp. 5235 ◽  
Author(s):  
You-Hyun Kim ◽  
Sang Youn Lee ◽  
Wook Song ◽  
Mei Meng ◽  
Richard Wood ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Contrast ◽  
Light Emitting ◽  
Organic Light

High Efficient White Organic Light-Emitting Diodes Using BCzVBi as Blue Fluorescent Dopant

2008 ◽  
Vol 8 (9) ◽  
pp. 4579-4583
Author(s):  
You-Hyun Kim ◽  
Su-Hwan Lee ◽  
Hyun-Soo Yoon ◽  
Jae-Yoon Choi ◽  
Sung Sik Shin ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Efficiency Improvement ◽  
Light Emitting ◽  
Organic Light ◽  
High Efficient

Efficiency improvement and color optimization of white organic light-emitting diodes (WOLEDs) were achieved via employing blue host DPVBi doped with blue fluorescent, BCzVBi. The structure of high efficient WOLED device was composed of ITO/NPB/DPVBi:BCzVBi-6%/MADN:DCM2-0.5%/Bphen/Liq/Al. WOLED doped by blue fluorescent BCzVBi exhibits 6.19 cd/A of luminous efficiency and 15400 cd/m2 of maximum luminescence. It also performs 480 cd/m2 of luminance at 5.7 V and 15,400 cd/m2 at 12.9 V with CIEx,y coordinates of (0.33, 0.32) and (0.32, 0.32), respectively. Hole carrier and energy transfer from DPVBi to BCzVBi are proposed to explain the observed phenomena.

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