ITO-free down-conversion white organic light-emitting diodes with structured color conversion layers for enhanced optical efficiency and color rendering

2012 ◽  
Vol 13 (12) ◽  
pp. 3145-3153 ◽  
Author(s):  
Tae-Wook Koh ◽  
Hyunsu Cho ◽  
Changhun Yun ◽  
Seunghyup Yoo
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Optical Efficiency ◽  
Light Emitting ◽  
Organic Light ◽  
Color Rendering ◽  
Color Conversion ◽  
Down Conversion

Blue Molecular Emitter-Free and Doping-Free White Organic Light-Emitting Diodes With High Color Rendering

2021 ◽  
Vol 42 (3) ◽  
pp. 387-390
Author(s):  
Baiquan Liu ◽  
Sujuan Hu ◽  
Lingjiao Zhang ◽  
Peng Xiao ◽  
Le Huang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Color Rendering

Four color stacked white organic light-emitting diodes utilizing the concept of triplet harvesting

2011 ◽  
Vol 1286 ◽  
Author(s):  
Th. C. Rosenow ◽  
S. Olthof ◽  
S. Reineke ◽  
B. Lüssem ◽  
K. Leo
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Organic Light Emitting Diodes ◽  
Light Sources ◽  
Emission Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Blue Emitters ◽  
Color Rendering ◽  
Triplet Harvesting

ABSTRACTOrganic light-emitting diodes (OLEDs) are developing into a competitive alternative to conventional light sources. Nevertheless, OLEDs need further improvement in terms of efficiency and color rendering for lighting applications. Fluorescent blue emitters allow deep blue emission and high stability, while phosphorescent blue emitter still suffer from insufficient stability. The concept of triplet harvesting is the key for achieving internal quantum efficiencies up to 100 % and simultaneously benefiting from the advantages of fluorescent blue emitters. Here, we present a stacked OLED consisting of two units comprising four different emitters in total. The first unit takes advantage of the concept of triplet harvesting and combines the light emission of a fluorescent blue and a phosphorescent red emitter. The second unit emits light from a single emission layer consisting of a matrix doped with phosphorescent green and yellow emitters. With this approach, we reach white color coordinates close to the standard illuminant A and a color rendering index of above 75. The presented devices are characterized by high luminous efficacies of above 30 lm/W on standard glass substrates without outcoupling enhancement.

White Organic Light-emitting Diodes with High Color Rendering Index Using Phosphorescent Sensitizer and Blue Fluorescent Emitter

2012 ◽  
Vol 33 (1) ◽  
pp. 97-101
Author(s):  
张世明 ZHANG Shi-ming ◽  
陈宇 CHEN Yu ◽  
王学会 WANG Xue-hui ◽  
张振松 ZHANG Zhen-song ◽  
岳守振 YUE Shou-zhen ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Color Rendering Index ◽  
Color Rendering

White top-emitting organic light-emitting diodes employing a heterostructure of down-conversion layers

2011 ◽  
Vol 12 (12) ◽  
pp. 2126-2130 ◽  
Author(s):  
Vipul Gohri ◽  
Simone Hofmann ◽  
Sebastian Reineke ◽  
Thomas Rosenow ◽  
Michael Thomschke ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Down Conversion
Sign in / Sign up

Export Citation Format

Share Document