Preparation and Characterization of Organic Light Emitting Devices Using QD Dopant

2004 ◽  
Vol 449-452 ◽  
pp. 1021-1024 ◽  
Author(s):  
Jung Yohn Cho ◽  
Ho Jung Chang
Keyword(s):  
Luminous Efficiency ◽  
Host Material ◽  
Oled Device ◽  
Emission Layer ◽  
Maximum Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Two types of the organic light-emitting devices (OLEDs) with different emission structures were prepared using Alq3 (aluminum tris 8-hydroxyquinoline) host material and quinacridone (QD) dopant at the emission layer. One is the OLED device with emission layer consisting of Alq3 host material doped with QD dopant ("codoped OLED"). The another one has a seperated QD dopant film in the Alq3 emission layer ("undoped OLED"). The maximum brightness of the codoped and undoped OLEDs were 3207 cd/m2 and 1570 cd/m2, respectively. The wavelength of the maximum emission peak in the undoped sample was 527 nm and shifted slightly toward longer wavelength with the value of 540 nm for the codoped OLED sample. The maximum luminous efficiency of the undoped OLED was about 1.4 lm/W and increased to 7.0 lm/W for the codoped sample.

Spirobiacridine-based Host Material for Highly Efficient Blue Phosphorescent Organic Light-emitting Devices

2020 ◽  
Vol 49 (3) ◽  
pp. 228-231 ◽  
Author(s):  
Hiroki Arai ◽  
Hisahiro Sasabe ◽  
Kohei Nakao ◽  
Yuki Masuda ◽  
Junji Kido
Keyword(s):  
Host Material ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Blue Phosphorescent

A Donor–Acceptor-type Host Material for Solution-processed Phosphorescent Organic Light-emitting Devices Showing High Efficiency

2014 ◽  
Vol 43 (12) ◽  
pp. 1935-1936 ◽  
Author(s):  
Chang-Hwa Jun ◽  
Yong-Jin Pu ◽  
Masahiro Igarashi ◽  
Takayuki Chiba ◽  
Hisahiro Sasabe ◽  
...  
Keyword(s):  
High Efficiency ◽  
Host Material ◽  
Solution Processed ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Type Host ◽  
Organic Light ◽  
Donor Acceptor ◽  
Organic Light Emitting Devices

Blue phosphorescent organic light-emitting devices based on carbazole/thioxanthene-S,S-dioxide with a high glass transition temperature

2015 ◽  
Vol 3 (24) ◽  
pp. 6192-6199 ◽  
Author(s):  
Young Pyo Jeon ◽  
Kyu Sung Kim ◽  
Kyeong Kyun Lee ◽  
In Kyu Moon ◽  
Dong Chul Choo ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Host Material ◽  
High Glass Transition Temperature ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Blue Phosphorescent

A bipolar host material for blue organic light-emitting devices was synthesized by incorporating electron-donating carbazole and electron-accepting thioxanthene-S,S-dioxide into one molecule using a solventless green reaction.

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