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Dendritic Iridium(III)-Encapsulated Complexes for Organic Light Emitting Diodes

Published online by Cambridge University Press:  26 February 2011

Ho-Jin Son ,
Won-Sik Han ,
Kyu-Bum Choi ,
Dae-Hyun Kim ,
Jaejung Ko ,
Seung-Uk Noh ,
Changhee Lee  and
Sang Ook Kang
Ho-Jin Son
Affiliation:
sonaudo1@korea.ac.kr, Korea University, Advanced material chemistry, Korea University, 208 Seochang, Chochiwon, chung-nam, 339-700, Korea, Republic of
Won-Sik Han
Affiliation:
woden0411@korea.ac.kr, Korea University, Advanced Material Chemistry, 208 Seochang, Jochiwon, 339-700, Korea, Republic of
Kyu-Bum Choi
Affiliation:
bummy@korea.ac.kr, Korea University, Advanced Material Chemistry, 208 Seochang, Jochiwon, 339-700, Korea, Republic of
Dae-Hyun Kim
Affiliation:
kdh632@korea.ac.kr, Korea University, Advanced Material Chemistry, 208 Seochang, Jochiwon, 339-700, Korea, Republic of
Jaejung Ko
Affiliation:
jko@korea.ac.kr, Korea University, Advanced Material Chemistry, 208 Seochang, Jochiwon, 339-700, Korea, Republic of
Seung-Uk Noh
Affiliation:
sunoh@oled.snu.ac.kr, Seoul National University, Electrical Engineering and Computer Science, Shillim-dong, Gwanak-gu, Seoul, 151-744, Korea, Republic of
Changhee Lee
Affiliation:
chlee7@snu.ac.kr, Seoul National University, Electrical Engineering and Computer Science, Shillim-dong, Gwanak-gu, Seoul, 151-744, Korea, Republic of
Sang Ook Kang
Affiliation:
sangok@korea.ac.kr, Korea University, Advanced Material Chemistry, 208 Seochang, Jochiwon, 339-700, Korea, Republic of
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Abstract

The syntxhesis, photo-physics, and electroluminescence of new types of Iridium(III)-encapsulated dendrimers are described. Thus, four different iridium complexes [Ir(III)(C^N)2(LX), Blue-DCBP, Green-DCBP, Yellow-DCBP, and Red-DCBP] with ancillary ligand tethered to the CBP dendritic unit were synthesized and investigated for their photo-physical properties. A large enhancement in electroluminescence performance was observed by using these dendrimers as host/dopant hybrid materials in layered emitting diodes. In particular, host/dopant ratio can be systematically adjusted by varying dendritic generations. These results demonstrate that new Ir(III)-encapsulated dendrimers can be used as potential single-layer materials for organic light emitting diodes. Large difference in the intra-molecular charge transfer phosphorescence quantum yields and electroluminescence effiencies were observed among dendriritic generations.

Keywords

electronic materialoptoelectronicdisplay
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 965: Symposium S – Organic Electronics – Materials, Devices and Applications , 2006 , 0965-S03-22
Copyright
Copyright © Materials Research Society 2007

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References

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