A
Ayumi Ishii
Researcher at Toin University of Yokohama
Publications - 58
Citations - 1252
Ayumi Ishii is an academic researcher from Toin University of Yokohama. The author has contributed to research in topics: Luminescence & Lanthanide. The author has an hindex of 15, co-authored 53 publications receiving 826 citations. Previous affiliations of Ayumi Ishii include Tottori University & National Presto Industries.
Papers
More filters
Journal ArticleDOI
Direct detection of circular polarized light in helical 1D perovskite-based photodiode.
TL;DR: Direct CPL detection by a photodiode using a helical one-dimensional structure of lead halide perovskites composed of naphthylethylamine-based chiral organic cations is reported, which largely surpasses the direct detecting CPL devices (<4) using chiral plasmonic metamaterials and organic materials.
Journal ArticleDOI
VOC Over 1.4 V for Amorphous Tin-Oxide-Based Dopant-Free CsPbI2Br Perovskite Solar Cells.
Zhanglin Guo,Ajay Kumar Jena,Izuru Takei,Gyu Min Kim,Muhammad Akmal Kamarudin,Yoshitaka Sanehira,Ayumi Ishii,Youhei Numata,Shuzi Hayase,Tsutomu Miyasaka +9 more
TL;DR: It is found that aging of SnCl2 precursor solution for electron transporting layer can promote the Voc of CsPbI2Br solar cells employing a dopant-free-polymer HTM over 1.40 V and efficiency over 15.5% with high reproducibility.
Journal ArticleDOI
Gate-Tunable Atomically Thin Lateral MoS2 Schottky Junction Patterned by Electron Beam.
Y. Katagiri,Taketomo Nakamura,Ayumi Ishii,C. Ohata,Miki Hasegawa,Shingo Katsumoto,Teresa Cusati,Alessandro Fortunelli,Giuseppe Iannaccone,Gianluca Fiori,Stephan Roche,Junji Haruyama +11 more
TL;DR: The first transport measurements evidencing the formation of a MoS2 Schottky barrier (SB) junction with barrier height of 0.13-0.18 eV are reported, revealing unique device fingerprint of SB-based field-effect transistors made from atom-thin 1T layers.
Journal ArticleDOI
Structural and spectroscopic properties of a copper(I)-bis(N-heterocyclic)carbene complex.
Kenji Matsumoto,Norimasa Matsumoto,Ayumi Ishii,Toshiaki Tsukuda,Miki Hasegawa,Taro Tsubomura +5 more
TL;DR: The results suggest that the dual emission is caused by differences in the contribution of metal-metal interactions at room temperature in the solid state.
Journal ArticleDOI
Conformation-controlled luminescent properties of lanthanide clusters containing p-tert-butylsulfonylcalix[4]arene.
Takashi Kajiwara,Kensuke Katagiri,Miki Hasegawa,Ayumi Ishii,Marilena Ferbinteanu,Shinya Takaishi,Tasuku Ito,Masahiro Yamashita,Nobuhiko Iki +8 more
TL;DR: Because the calixarene has a large pi-conjugate system expanding over the entire molecule, it behaves as a good antenna chromophore for UV and near-UV light, and selectivity is observed in the luminescent properties of dinuclear and cubane-shaped systems of EuIII and TbIII.