J
Junghwan Kim
Researcher at Tokyo Institute of Technology
Publications - 56
Citations - 1660
Junghwan Kim is an academic researcher from Tokyo Institute of Technology. The author has contributed to research in topics: Thin film & Amorphous solid. The author has an hindex of 14, co-authored 56 publications receiving 865 citations. Previous affiliations of Junghwan Kim include Ajou University.
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Lead-Free Highly Efficient Blue-Emitting Cs3Cu2I5 with 0D Electronic Structure
TL;DR: New halide materials that meet the requirements of: (i) nontoxicity, (ii) high PLQY, and (iii) ease of fabrication of thin films via the solution process are explored.
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Amorphous IGZO TFT with High Mobility of ∼70 cm2/(V s) via Vertical Dimension Control Using PEALD
Jiazhen Sheng,Tae Hyun Hong,Hyun Mo Lee,Kyoung Rok Kim,Masato Sasase,Junghwan Kim,Hideo Hosono,Jin-Seong Park +7 more
TL;DR: In-rich IGZO TFTs consisting of vertically stacked InOx and GaZnOx atomic layers fabricated at a low deposition temperature (200 oC) exhibit significantly high mobilities of ~80 cm2/Vs while keeping a reasonable carrier density of ~1017 cm-3.
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Transparent amorphous oxide semiconductors for organic electronics: Application to inverted OLEDs
TL;DR: This approach provides a solution to the problem of fabricating oxide thin-film transistor-driven OLEDs with both large size and high stability.
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Conversion of an ultra-wide bandgap amorphous oxide insulator to a semiconductor
Junghwan Kim,Takumi Sekiya,Norihiko Miyokawa,Naoto Watanabe,Koji Kimoto,Keisuke Ide,Yoshitake Toda,Shigenori Ueda,Naoki Ohashi,Naoki Ohashi,Hidenori Hiramatsu,Hideo Hosono,Toshio Kamiya +12 more
TL;DR: Kim et al. as discussed by the authors showed that high partial pressures of oxygen gas during rapid laser deposition transforms amorphous gallium oxide films into semiconductors, achieving an electron Hall mobility of 8.5 cm2V−1.
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Exploration of Stable Strontium Phosphide-Based Electrides: Theoretical Structure Prediction and Experimental Validation
Junjie Wang,Kota Hanzawa,Hidenori Hiramatsu,Junghwan Kim,Naoto Umezawa,Koki Iwanaka,Tomofumi Tada,Hideo Hosono +7 more
TL;DR: Although density functional calculations with the generalized gradient approximation predict Sr5P3 to be a metal, electrical conductivity measurement reveal semiconducting properties characterized by a distinct band gap, which indicates that the newly synthesized Sr 5P3 is an ideal one-dimensional electride with the half-filled band by unpaired electrons.