Y
Yukihiro Hayashi
Researcher at Yamagata University
Publications - 6
Citations - 1396
Yukihiro Hayashi is an academic researcher from Yamagata University. The author has contributed to research in topics: Quantum dot & Perovskite (structure). The author has an hindex of 5, co-authored 6 publications receiving 929 citations.
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Journal ArticleDOI
Anion-exchange red perovskite quantum dots with ammonium iodine salts for highly efficient light-emitting devices
Takayuki Chiba,Yukihiro Hayashi,Hinako Ebe,Keigo Hoshi,Jun Sato,Shugo Sato,Yong-Jin Pu,Satoru Ohisa,Junji Kido +8 more
TL;DR: In this paper, a red perovskite quantum dot-based light-emitting devices were fabricated by anion exchange from pristine CsPbBr3 using halide-anion-containing alkyl ammonium and aryl ionium salts.
Journal ArticleDOI
High-Efficiency Perovskite Quantum-Dot Light-Emitting Devices by Effective Washing Process and Interfacial Energy Level Alignment
Takayuki Chiba,Keigo Hoshi,Yong-Jin Pu,Yuya Takeda,Yukihiro Hayashi,Satoru Ohisa,So Kawata,Junji Kido +7 more
TL;DR: In this article, a low-drivingvoltage and high-efficiency CsPbBr3 PeQDs light-emitting devices (PeQD-LEDs) were fabricated using a PeQD washing process with an ester solvent containing butyl acetate (AcOBu) to remove excess ligands from the Pe-Ds.
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Purification of Perovskite Quantum Dots Using Low-Dielectric-Constant Washing Solvent "Diglyme" for Highly Efficient Light-Emitting Devices.
Keigo Hoshi,Takayuki Chiba,Jun Sato,Yukihiro Hayashi,Yoshihito Takahashi,Hinako Ebe,Satoru Ohisa,Junji Kido +7 more
TL;DR: The purification of perovskite QDs with multiple wash cycles using a low-dielectric-constant solvent is an effective approach for enhancing not only the optical properties but also the efficiency of perOVskite quantum dot light-emitting devices.
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Air-Stable and High-Performance Solution-Processed Organic Light-Emitting Devices Based on Hydrophobic Polymeric Ionic Liquid Carrier-Injection Layers.
Shugo Sato,Satoru Ohisa,Yukihiro Hayashi,Ryo Sato,Daisuke Yokoyama,Tetsuya Kato,Michinori Suzuki,Takayuki Chiba,Yong-Jin Pu,Junji Kido +9 more
TL;DR: The optimized PLED employing an EIL comprising poly(diallyldimethylammonium) bis(trifluoromethanesulfonyl)imide (poly(DDA)TFSI), which is expected to display good moisture resistance because of water repellency of fluorocarbon groups, exhibits excellent storage stability in air and electroluminescence performance.
Journal ArticleDOI
Conjugated Polyelectrolyte Blend with Polyethyleneimine Ethoxylated for Thickness-Insensitive Electron Injection Layers in Organic Light-Emitting Devices.
Satoru Ohisa,Tetsuya Kato,Tatsuya Takahashi,Michinori Suzuki,Yukihiro Hayashi,Tomoyuki Koganezawa,Christopher R. McNeill,Takayuki Chiba,Yong-Jin Pu,Junji Kido +9 more
TL;DR: Optimized PEIE:PFN-Br blend EIL-based devices presented lower driving voltages and smaller dependences of device performance on EIL thickness than single PEIE or PFN- Br- based devices.