Influence of the hole blocking layer on blue phosphorescent organic light-emitting devices using 3,6-di(9-carbazolyl)-9-(2-ethylhexyl)carbazole as host material

2010 ◽  
Vol 96 (9) ◽  
pp. 093304 ◽  
Author(s):  
Nico Seidler ◽  
Sebastian Reineke ◽  
Karsten Walzer ◽  
Björn Lüssem ◽  
Ausra Tomkeviciene ◽  
...  
Keyword(s):  
Host Material ◽  
Blocking Layer ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Hole Blocking Layer ◽  
Organic Light Emitting Devices ◽  
Blue Phosphorescent

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

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.

A Novel Efficient Blue Organic Light Emitting Structure

2005 ◽  
Vol 475-479 ◽  
pp. 3677-3680 ◽  
Author(s):  
Wen Long Jiang ◽  
Yu Duan ◽  
Yi Zhao ◽  
Jingying Hou ◽  
Shi Yong Liu
Keyword(s):  
Light Emission ◽  
Copper Phthalocyanine ◽  
Luminous Efficiency ◽  
Blocking Layer ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Carrier Recombination ◽  
Organic Light ◽  
Hole Blocking Layer ◽  
Organic Light Emitting Devices

In this paper, we describe the performance of an organic light emitting devices〔OLEDs〕 with ITO /4,4’,4“-tris{N,- （ 3-methylphenyl ） -N-phenylamino}triphenylamine (m-MTDATA) /N,N-diphenyl-N,N-bis1-naphthyl-1,1-biphenyl-4,4-diamine (NPB) /copper phthalocyanine (CuPc) / NPB / Bathocuproine(BCP) / tris-8-hydroxyquinoline Aluminum (Alq3) / LiF/ AL structure, the CuPc inserted between the two layers of NPB as a hole-consuming layer (HCL), and the BCP as a hole-blocking layer (HBL) . The EL spectrum peak is at 430 nm, indicating that the carrier recombination is confined in the NPB layer, in additional light emission originates from NPB. Compared with the luminous efficiency of the conventional diode without CuPc layer, that of the diode with HCL has been sharply increased up to 2.62 cd /A. It suggested that the CuPc and BCP exactly function as hole-consuming and hole-blocking layers, respectively, which enhance the efficiency of carrier，s recombination and confine the excitation in the EL layer.

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