C
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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Effect of morphological and physicochemical properties of dielectric-organic semiconductor interfaces on photoresponse of organic phototransistors
TL;DR: In this article, the effect of the interfacial properties between a polymer dielectric and an organic semiconductor (OS) layers on the photoresponse properties of an organic phototransistor (OPT) was investigated.
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Narrowband Organic Light-Emitting Diodes for Fluorescence Microscopy and Calcium Imaging.
Caroline Murawski,Andreas Mischok,Jonathan Hunter Booth,Jothi Dinesh Kumar,Emily Archer,Laura Christine Tropf,Chang-Min Keum,Yali Deng,Kou Yoshida,Ifor D. W. Samuel,Marcel Schubert,Stefan R. Pulver,Malte C. Gather +12 more
TL;DR: Narrowband organic light‐emitting diodes (OLEDs) are developed and used for fluorescence imaging of live cells and for mapping of neuronal activity in Drosophila melanogaster via genetically encoded Ca2+ indicators to open a new pathway for the development of implantable light sources that enable functional imaging and sensing in freely moving animals.
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Effects of Interfacial Charge Depletion in Organic Thin-Film Transistors with Polymeric Dielectrics on Electrical Stability
TL;DR: In this paper, the authors investigated the electrical stabilities of two types of pentacene-based organic thin-film transistors (OTFTs) with two different polymeric dielectrics: polystyrene (PS) and poly(4-vinyl phenol) (PVP), in terms of the interfacial charge depletion.
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Accurate Efficiency Measurements of Organic Light‐Emitting Diodes via Angle‐Resolved Spectroscopy
Emily Archer,Sabina Hillebrandt,Chang-Min Keum,Caroline Murawski,Jan Murawski,Francisco Tenopala-Carmona,Malte C. Gather,Malte C. Gather +7 more
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Vertical organic light-emitting transistor showing a high current on/off ratio through dielectric encapsulation for the effective charge pathway
Gyujeong Lee,In Ho Lee,Hea-Lim Park,Sin Hyung Lee,Jongseok Han,Changhee Lee,Chang-Min Keum,Sin-Doo Lee +7 more
TL;DR: In this paper, the authors demonstrate a vertical organic light emitting transistor (VOLET) showing a high current on/off ratio through dielectric encapsulation of a finger-like source electrode, which is placed between the bottom gate electrode and the top drain electrode.