An alternating copolymer consisting of light emitting and electron transporting units

1999 ◽  
Vol 9 (9) ◽  
pp. 2171-2176 ◽  
Author(s):  
Jai Kyeong Kim ◽  
Jae Woong Yu ◽  
Jae Min Hong ◽  
Hyun Nam Cho ◽  
Dong Young Kim ◽  
...  
Keyword(s):  
Light Emitting ◽  
Alternating Copolymer

Synthesis of a New Polymeric Host Material for Efficient Organic Electro-Phosphorescent Devices

2008 ◽  
Vol 8 (9) ◽  
pp. 4649-4652 ◽  
Author(s):  
Do-Hoon Hwang ◽  
Moo-Jin Park ◽  
Jae-Hoon Eom ◽  
Hong Ku Shim ◽  
Seongtaek Lee ◽  
...  
Keyword(s):  
Thermal Imaging ◽  
Coupling Reaction ◽  
Luminous Efficiency ◽  
Host Material ◽  
Suzuki Coupling Reaction ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Alternating Copolymer ◽  
Polymeric Host ◽  
Phosphorescent Dyes

We have synthesized a new polymeric host material for phosphorescent dyes, which can be used in phosphorescent light-emitting layers. An alternating copolymer, composed of N-alkylcarbazole and tetramethylbenzene units was synthesized through the Suzuki coupling reaction. We fabricated electro-phosphorescent devices using the synthesized polymeric host doped with solution-processible green and red phosphorescent dyes. Light-emitting devices have an ITO/PEDOT/polymer + dopant/Balq3/Alq3/LiF/Al configuration. The device containing one of two studied green dopants (designated as green 1) in the polymeric host showed the best performance, with a maximum luminous efficiency of 29 cd/A. A thin film of this polymeric was successfully patterned by laser-induced thermal imaging (LITI), and an electro-phosphorescent device was fabricated using the patterned film. This patterned device showed performance characteristics similar to those of a spin-coated device.

Synthesis and characterization of a soluble blue light emitting alternating copolymer

1998 ◽  
Vol 125 (1) ◽  
pp. 133-142 ◽  
Author(s):  
Hyun Nam Cho ◽  
Jai Kyeong Kim ◽  
Dong Young Kim ◽  
Chung Yup Kim
Keyword(s):  
Blue Light ◽  
Synthesis And Characterization ◽  
Light Emitting ◽  
Alternating Copolymer

Light-emitting diodes based on an alternating copolymer containing triphenylamine and phenylene units

1999 ◽  
Vol 74 (16) ◽  
pp. 2295-2297 ◽  
Author(s):  
Gui Yu ◽  
Yunqi Liu ◽  
Xia Wu ◽  
Min Zheng ◽  
Fenglian Bai ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
Alternating Copolymer

An alternating copolymer for a blue light-emitting diode

1997 ◽  
Vol 38 (2) ◽  
pp. 169-176 ◽  
Author(s):  
J. K. Kim ◽  
S. I. Hong ◽  
H. N. Cho ◽  
D. Y. Kim ◽  
C. Y. Kim
Keyword(s):  
Blue Light ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Alternating Copolymer

A Soluble Green-Light-Emitting Alternating Copolymer with Acceptor-Substituted Bicarbazyl Units

1999 ◽  
Vol 32 (14) ◽  
pp. 4729-4731 ◽  
Author(s):  
V. Boucard ◽  
D. Adès ◽  
A. Siove ◽  
D. Romero ◽  
M. Schaer ◽  
...  
Keyword(s):  
Green Light ◽  
Light Emitting ◽  
Alternating Copolymer

Electronic structure studies of conducting polymers by electron energy-loss spectroscopy

1996 ◽  
Vol 54 ◽  
pp. 160-161
Author(s):  
J. Fink
Keyword(s):  
Electronic Structure ◽  
Conducting Polymers ◽  
Conjugated Polymers ◽  
Electron Acceptors ◽  
Electron Donors ◽  
Light Emitting ◽  
One Dimensional ◽  
New Class ◽  
Electrical Conductivities ◽  
Electron Energy Loss

Conducting polymers comprises a new class of materials achieving electrical conductivities which rival those of the best metals. The parent compounds (conjugated polymers) are quasi-one-dimensional semiconductors. These polymers can be doped by electron acceptors or electron donors. The prototype of these materials is polyacetylene (PA). There are various other conjugated polymers such as polyparaphenylene, polyphenylenevinylene, polypoyrrole or polythiophene. The doped systems, i.e. the conducting polymers, have intersting potential technological applications such as replacement of conventional metals in electronic shielding and antistatic equipment, rechargable batteries, and flexible light emitting diodes.Although these systems have been investigated almost 20 years, the electronic structure of the doped metallic systems is not clear and even the reason for the gap in undoped semiconducting systems is under discussion.

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