H
Hakkoo Kim
Researcher at Korea University
Publications - 8
Citations - 655
Hakkoo Kim is an academic researcher from Korea University. The author has contributed to research in topics: OLED & Organic electronics. The author has an hindex of 5, co-authored 8 publications receiving 624 citations.
Papers
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Journal ArticleDOI
Electrical conductivity and electromagnetic interference shielding of multiwalled carbon nanotube composites containing Fe catalyst
Hakkoo Kim,Kyoungwon Kim,Chongmin Lee,Jinsoo Joo,SJ Cho,HS Yoon,Dušan A. Pejaković,Jung-Woo Yoo,A. J. Epstein +8 more
TL;DR: In this paper, thin and flexible composite films of raw or purified multiwalled carbon nanotube (MWCNT) with various mass fractions and poly(methylmethacrylate) (PMMA) were synthesized for electromagnetic interference (EMI) shielding material.
Journal ArticleDOI
Fuzzy nanoassembly of polyelectrolyte and layered clay multicomposite toward a reliable gas barrier.
Jin Hwan Choi,Young Wook Park,Tae Hyun Park,Eun Ho Song,Hyun Jun Lee,Hakkoo Kim,Se Joong Shin,Vincent Lau Chun Fai,Byeong Kwon Ju +8 more
TL;DR: The experimental results showed that the layer-by-layer deposition of oppositely charged thin films containing self-assembled poly(vinyl alcohol) and montmorillonites improved their gas barrier characteristics based on the Ca degradation test, enhancing their optical transparency.
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Negative mold transfer patterned conductive polymer electrode for flexible organic light-emitting diodes
Hyun Jun Lee,Tae Hyun Park,Jin Hwan Choi,Eun Ho Song,Se Joong Shin,Hakkoo Kim,Kyung Cheol Choi,Young Wook Park,Byeong Kwon Ju +8 more
TL;DR: In this paper, the authors demonstrate flexible organic light-emitting diodes (FOLEDs) that use flexible conductive polymer electrodes patterned by negative mold transfer printing (nMTP).
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Role of n-dopant based electron injection layer in n-doped organic light-emitting diodes and its simple alternative
Young Wook Park,Jin Hwan Choi,Tae Hyun Park,Eun Ho Song,Hakkoo Kim,Hyun Jun Lee,Se Joong Shin,Byeong Kwon Ju,Won Jun Song +8 more
TL;DR: In this article, the enhancement mechanism of the electroluminescence (EL) of alkali metal based n-doped organic light-emitting diodes (OLEDs) was investigated.
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Improvement of light out-coupling in organic light-emitting diodes by printed nanosized random texture layer
Se Joong Shin,Tae Hyun Park,Jin Hwan Choi,Eun Ho Song,Hakkoo Kim,Hyun Jun Lee,Jeong-Ik Lee,Hye Yong Chu,Kyu Back Lee,Young Wook Park,Byeong Kwon Ju +10 more
TL;DR: In this paper, a nanosized random texture layer (nRTL) was applied to organic light-emitting diodes (OLEDs) for improved power efficiency and undistorted light output.