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Chang-Min Keum
Researcher at University of St Andrews
Publications - 56
Citations - 1253
Chang-Min Keum is an academic researcher from University of St Andrews. The author has contributed to research in topics: Organic semiconductor & Pentacene. The author has an hindex of 15, co-authored 56 publications receiving 917 citations. Previous affiliations of Chang-Min Keum include Kent State University & Dresden University of Technology.
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Journal ArticleDOI
The Role of Metallic Dopants in Improving the Thermal Stability of the Electron Transport Layer in Organic Light‐Emitting Diodes
Chang-Min Keum,Nils M. Kronenberg,Caroline Murawski,Kou Yoshida,Yali Deng,Cordelia Berz,Wenbo Li,Mengjie Wei,Ifor D. W. Samuel,Malte C. Gather +9 more
TL;DR: In this paper, the authors acknowledge support from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1A6A3A03012331).
Journal ArticleDOI
Improving the Thermal Stability of Top-Emitting Organic Light-Emitting Diodes by Modification of the Anode Interface
Yali Deng,Chang-Min Keum,Sabina Hillebrandt,Caroline Murawski,Malte C. Gather,Malte C. Gather +5 more
TL;DR: In this paper, the authors acknowledge support from the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2017R1A6A3A03012331).
Journal ArticleDOI
Minority Currents in n-Doped Organic Transistors.
Akram Al-Shadeedi,Shiyi Liu,Shiyi Liu,Chang-Min Keum,Chang-Min Keum,Daniel Kasemann,Daniel Kasemann,Christoph Hoßbach,Christoph Hoßbach,Johann W. Bartha,Johann W. Bartha,Scott D. Bunge,Scott D. Bunge,Björn Lüssem,Björn Lüssem +14 more
TL;DR: It is shown that holes can be efficiently injected into the transistor channel via Zener tunneling inside the intrinsic pentacene layer underneath the drain electrode and the onset of minority (hole) conduction is shifted by lightly n-doping the channel region of the transistor.
Journal ArticleDOI
Field-symmetrization to solve luminance deviation between frames in a low-frequency-driven fringe-field switching liquid crystal cell.
Min Su Kim,Philip J. Bos,Dong-Woo Kim,Chang-Min Keum,Deng-Ke Yang,Hyeong Gyun Ham,Kwang-Un Jeong,Joong Hee Lee,Seung Hee Lee +8 more
TL;DR: It is demonstrated that the field-symmetry is crucial to reduce the image-flickering, and it can be obtained by optimization of the thickness of an insulation layer with respect to the ratio of the space between electrodes to the electrode width.
Journal ArticleDOI
Optical anisotropy of aligned pentacene molecules on a rubbed polymer corresponding to the electrical anisotropy
TL;DR: In this paper, the optical anisotropic properties of a pentacene film on a rubbed polyvinylalcohol (PVA) layer were investigated and the electrical performances of the OFETs were correlated with the optical properties of the PVA layer.