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Park, Lee Soon
School of Materials Science and Engineering
Research Interests
  • Flexible OLED new materials, process and fabrication
  • Touch Screen Panel(TSP) new materials and process new materials and process
  • Nano-materials synthesis and application (Ag nano-wire and metal mesh electrode)

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Effect of Hole Injection Layer/Hole Transport Layer Polymer and Device Structure on the Properties of White OLED

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Title
Effect of Hole Injection Layer/Hole Transport Layer Polymer and Device Structure on the Properties of White OLED
Author
Cho, Ho YoungPark, Eun JungKim, Jin-hooPark, Lee Soon
Keywords
Hole injection layer;  Polymer OLED;  White OLED
Issue Date
2008-10
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.8, no.10, pp.4916 - 4922
Abstract
Copolymers containing carbazole and aromatic amine unit were synthesized by using Pd-catalyzed polycondensation reaction. The polymers were characterized in terms of their molecular weight and thermal stability and their UV and PL properties in solution and film state. The band gap energy of the polymers was also determined by the UV absorption and HOMO energy level data. The polymers had high HOMO energy level of 5.19 similar to 5.25 eV and work function close to that of ITO. The polymers were thus tested as hole injection/transport layer in the white organic light emitting diodes (OLED) by using 4,4'-bis(2,2-diphenyl-ethen-1-yl)diphenyl (DPVBi) as blue emitting material and 5,6,11,12-tetraphenylnaphthacene (Rubrene) as orange emitting dopant. The synthesized polymer, poly bis[6-bromo-N-(2-ethylhexyl)-carbazole-3-yl] was found to be useful as hole injection layer/hole transport layer (HIL/HTL) multifunctional material with high luminance efficiency and stable white color coordinate in the wide range of applied voltage
URI
https://scholarworks.unist.ac.kr/handle/201301/17014
DOI
10.1166/jnn.2008.1300
ISSN
1533-4880
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