Tokyo Institute of Technology
Kamiya-Katase Group

  • Hosono
    Gr.
  • Japanese
スライドショー
スライドショー
スライドショー
スライドショー
スライドショー
スライドショー
スライドショー

Create our original functional materials and devices

We create "New Functional Thin-film Materials" changing our world

It is known that currently widely-used semiconductors such as Si have limitations to develop e.g. low-cost & high-efficiency solar cells, ultra-large OLED TVs, and flexible transparent displays. In our laboratory, we have been challenging to explore really new functional materials different from the conventional electronic materials and to create novel optical, electronic, energy devices. One of our achievements is “IGZO”, which is a high-performance semiconductor material, replacing a conventional amorphous Si in flat panel displays, and is already commercialized in high-resolution LCD and very large OLED displays. As such, our propose is to find next functional thin-film materials, following IGZO, that will make our world better and fascinating. By our original “material design” concepts, we continue to challenge to dramatically enhance the performances of solar cells, transistors, thermoelectric devices, LEDs, lasers etc.
 

Recent achievement

  2022/04/12  Controlling Heat Flow in a Solid by Switching Crystal Structure Dimensionality  Advanced Electronic Materials  Titech News
  2022/03/15  30-fold Enhancement of Thermoelectric Performance in Polycrystalline Tin Selenide: A Simple Method for Large-size Te Ion Substitution  Advanced Science  Titech News
  2021/10/29   Boosting Thermopower of Oxides via Artificially laminated Metal/Insulator Heterostructure  Nano Letters  EurekAlert AAAS  Titech News
  2021/10/21   Breaking Trade-Off Problem That Limits Thermoelectric Conversion Efficiency of Waste Heat  Advanced Science  EurekAlert AAAS   Titech News
  2021/03/22   Giant Electronic Conductivity Change Driven by Artificial Switch of Crystal Dimensionality Science Advances  Titech News
  2020/12/02   Multiple Semiconductor Type Switching To Boost Thermoelectric Conversion of Waste Heat Advanced Functional Materials  Titech News
 

News & Topics

2022/09/22
Member: Mr. Ishikawa (B3) Joined
2022/09/22
Graduation: D3 He got Doctor Degree. M2 Hu and Li got Master degree. Congratulations!
2022/09/20
Conference:The 83rd JSAP Autumn Meeting 2022 @Sendai (Katase, He)
2022/09/15
Conference:The Ceramic Society of Japan, The 34th Fall Meeting @Tokushima (D3 He、D1 Shigeru、M2 Hu・Higuchi、M1Yoshikawa)
Higuchi and Yoshikawa won presentation Awards
2022/08/09
Hu and Li gave Master Thesis presentation.
2022/07/23
Conference:The 6th Phonon Engineering Workshop (Katase, D1 Shigeru, M2 Hu)
2022/07/14
PhD thesis defence: Presenter: HE Xinyi, Thesis title:First-principles materials design of inorganic semiconductors with defects and phonon scattering, Moderator:Prof. Toshio Kamiya
2022/04/20
Publication: A. Shiraishi, S. Kimura, X. He et al.,「Design, Synthesis, and Optoelectronic Properties of the High-Purity Phase in Layered AETMN2 (AE = Sr, Ba; TM = Ti, Zr, Hf) Semiconductors」Inorganic Chemistry
2022/04/14
Publication: X. He, J. Chen et al.,「High-Mobility Metastable Rock-Salt Type (Sn,Ca)Se Thin Film Stabilized by Direct Epitaxial Growth on a YSZ (111) Single-Crystal Substrate」がACS Appl. Mater. Interfaces
2022/04/11
Publication: K. Li et al.,「Low Residual Carrier Density and High In-Grain Mobility in Polycrystalline Zn3N2 Films on a Glass Substrate」がACS Appl. Electron. Mater.
2022/04/01
Member: Mr. Minamishima (B4) Joined
2022/04/01
M1 students Mr. Ushijima, Oida, Kumagai joined our group.
2021/03/28
Graduation: Masatoshi, Shigeru, Linwei, Nomoto, Nakatani, Aoyama, Hiramatsu, Yamakawa got Master degree. Yoshikawa, Ogata, Shimizu, Sagano got Bachelor degree. Congratulations!
2021/10/29
Publication: Y. Nishimura et al., "Electronic and Lattice Thermal Conductivity Switching by 3D-2D Crystal Structure Transition in Nonequilibrium (Pb1-xSnx)Se" is published in Advanced Electronic Materials.
2021/10/29
Publication:X. He et al., "Degenerated Hole Doping and Ultra-Low Lattice Thermal Conductivity in Polycrystalline SnSe by Nonequilibrium Isovalent Te Substitution" is published in Advanced Science.
2022/03/05
Conference:New Material meeting 2022 @Sapporo, Hokkaido (Masatoshi, Shigeru, Nomoto)
2021/12/13
Conference:Materials Research Meeting 2021 (Prof. Ide, Xinyi, Kaiwen, Masatoshi, Shigeru)
2021/12/07
Conference:Materials Research Society Fall meeting 2021 (Xinyi, Masatoshi, Shigeru)
2021/10/29
Publication: M. Kimura et al., "Large phonon drag thermopower boosted by massive electrons and phonon leaking in LaAlO3/LaNiO3/LaAlO3 heterostructure" is published in Nano Letters.
2021/10/29
Publication: T. Katase et al., "Breaking of Thermopower-Conductivity Trade-Off in LaTiO3 Film around Mott Insulator to Metal Transition" is published in Advanced Science.
2021/09/28
Member: Mr. Sakamaki (B3) Joined
2021/09/24
Graduation: Mr. Shi and Chen got Master degree. Mr. Abe got Bachelor degree. Congratulations!
2021/09/6
Mr. Kaiwen gave oral presentation at SSDM2021.
2021/07/9
He Xinyi et al., "Ion Substitution Effect on Defect Formation in Two-Dimensional Transition Metal Nitride Semiconductors, AETiN2 (AE = Ca, Sr, and Ba)" is published in Inorganic Chemistry.
2021/07/8
Xinyi, Kaiwen, Masatoshi, Shigeru, Mari, Takumi, Ryusei gave presentation at STAC12 conference. Mr. Ryusei Higuchi recieved Presentation Award. Congratulations!
2020/04/01
B4 students Mr. Sagano, Ogata, Shimizu, and Ms. Yoshikawa joined our group.
2020/04/01
M1 students Mr. Ikeda, Sakaban, Maejima joined our group.
2021/07/9
T. Katase et al., "Reversible 3D-2D structural phase transition and giant electronic modulation in nonequilibrium alloy semiconductor, lead-tin-selenide" is published in Science Advances.
2020/03/31
Mr. Kato, Takahashi, Shiraishi, Cho, Nishimura, and Ms. Kawasaki and Hashimoto got Master degree. Congratulations!
2021/03/18
Prof. Ide and Mr. Takahashi gave presentations at JSAP spring meeting.
2021/03/09
Prof. Ide gave a invited presentation at ISPlasma/IC-PLANTS2021.
2021/02/22
Mr. Higuchi, Nose, Kadono gave a thesis presentation online. Mr. Higuchi was awarded by Tokyo Tech. Congratulations!
2021/02/08
Mr. Kato, Cho, Shiraishi, Takahashi, Nishimura and Ms. Kawasaki, Hashimoto gave Master Thesis presentation.
2020/12/02
Publication: Chihiro Yamamoto et al., "Double Charge Polarity Switching in Sb‐Doped SnSe with Switchable Substitution Sites"; Advanced Functional Materials (in press).<news release
2020/11/17
Publication: Christian A Nidermier et al., "Shallow Valence Band of Rutile GeO2 and P-type Doping"; The Journal of Physical Chemistry C.
2020/11/12
Ms. He and Hashimoto and Mr. Shiraishi, Cho, Nishimura gave presentations at Ceramic Society of Japan Meeting.
2020/11/06
Mr. Kato and Kimura gave presentions at TFMD. Mr. Kimra was awarded as Student awarad. Congratulations!
2020/10/13
Prof. Ide gave a invited presentaiton at ICDT2020.
2020/10/06
Mr. Abe and Ms. Ikeda joined our group.
2020/10/01
Mr. Li and Ko joined our group as Mater Course.
2020/09/04
Prof. Ide gave a invited presentaiton at AMFPD'20.
2020/08/27
Prof. Ide gave a presentaion at CIQuS seminar.
2020/04/01
Nine new members joined our group.
2020/03/24
Publication: Christian A Nidermier et al., "Phonon scattering limited mobility in the representative cubic perovskite semiconductors SrGeO3, BaSnO3, and SrTiO3"; Physical Review B.
2020/02/17
Prof. Ide gave a presentation at Workshop of Defect Functionalized Sustainable Energy Materials.
2020/02/13
Mr. Higuchi, Matsuo, Mori and Ms. Kasai, Yamamoto gave thesis presentations.
2020/02/03
Prof. Ide gave a presentation at Symposium of Material Element Strategy.
2020/02/01
Publication: Keisuke Ide et al., 2020年版 薄膜作製応用ハンドブック
2020/01/06
Watanabe(D3) gave a thesis presentation at Suzukakedai campus.
2019/12/27
Bo-nen-kai was held.
2019/12/11
Profs. Katase, Ide, Chris and Watanabe (D3), Kobayashi (D3), He (D1) gave presentations at the Material Research Meeting 2019 in Yokohama.
2019/11/28
Profs. Katase, Ide and He (D1), Kasai (M2), Yamamoto (M2), Shiraishi (M1), Nishimura (M1) gave presentations at the meeting of Ceramic Society of Japan in Nagoya.
2019/11/27
Prof. Ide was awarded from MSL, Tokyo Tech.
2019/11/07
Kaiwen (D1) and Kasai (M2) gave presentations at TFMD. Ide gave an invited lecture.
2019/11/02
Prof. Ide gave a presentation at ICMaSS2019.
2019/10/18
Profs. Kamiya and Ide held Fujihara seminar at Hakone.
2019/10/10
Prof. Ide, Chris, Higuchi (M2), Cho (M1), Kimura (B4) gave presentations at TOEO in Nara. Higuchi and Kimra were awarded as Best Poster Award (Silver).
2019/10/01
Chen, Shi, Nose, Linwei and Kaiwen joined our group.
2019/9/27
Publication: Kenji Kojima et al., "Electronic structure of interstitial hydrogen in In-Ga-Zn-O semiconductor simulated by muon"; Applied Physics Letters 115, 122104 (2019). [Editor's pick]. <news release
2019/8/16
Publication: He Xinyi et al., "Intrinsic and extrinsic defects in layered nitride semiconductor SrTiN2"; Journal of Physical Chemistry C 123, 19307 (2019).
2019/8/09
Graduation party for He-san was held.
2019/7/25
BBQ party was held at Suzukakedai campus.
2019/7/11
Prof. Katase, Ide, Chris, Watanabe (D3), Kobayashi (D3), He (M2), Higuchi (M1), Kasai (M1), Yamamoto (M1) gave presentations at STAC11. He-san was awarded as Silver award.
2019/7/10
Publication: Wu et al., "New Amorphous In-Ga-Zn-O Thin-Film Transistor-Based Optical Pixel Sensor for Optical Input Signal with Short Wavelength"; IEEE Transactions on Electron Devices.
2019/6/11
BBQ party was held.
2019/5/15
Prof. Ide and He (M2) gave presentations at McGill University.
2019/4/22
Prof. Ide gave a presentation at meeting of Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development.
2019/4/01
New members joined our group.
2019/3/13
Prof. Ide was awarded from Tokyo Tech.
2019/3/11
Prof. Kamiya, Watanabe (D2), He (M2) and Kasai (M2) gave presentations at JSAP meeting held at Tokyo Tech.
2019/3/05
Profs. Kamiya, Katase and Ide gave presentations at the meeting of Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development.
2019/2/19
Prof. Ide gave a presentation at Workshop with University College London & McGill University in London.
2019/1/18
Nishimagi (M2) gave a presentation at the meeting of Ceramic Society of Japan at Sendai.
2018/12/27
Bo-nen-kai was held.
2018/11/28
Prof. Kamiya was awarded from THOMSON REUTERS as Highly Cited Researchers 2018.
2018/11/12
Prof. Kamiya and Ide gave presentations at the Workshop with University College London & McGill University.
2018/11/10
Watanabe (D2), Nishimagi (M2), He (M2), Yamamoto (M1), Kasai (M1), Mori (M1), Higuchi (M1), Matsuo (M1) gave presentations at TFMD in Kyoto. Watanabe and Higuchi was awarded as "Student Award".
2018/10/26
Prof. Ide held the meeting of 第2回酸化物半導体討論会 at Tokyo Tech.
2018/10/03
Farewel party for Xiangzhao Zhang was held.
2018/10/02
Prof. Ide gave an invited lecture at AiMES 2018 held in Mexico.
2018/09/27
Zhang Haoyun joined our group as Mater Course.
2018/09/27
Profs. Kamiya, Katase and Ide gave presentations at iLIM-3.
2018/09/01
Publication: Keisuke Ide et al., "Transition Metal‐Doped Amorphous Oxide Semiconductor Thin‐Film Phosphor, Chromium‐Doped Amorphous Gallium Oxide"; physica status solidi (a) 2018, 18800198.
2018/08/09
Farewel party for Prof. Xiao was held.
2018/08/02
Publication: Zewen Xiao et al., "Multiple states and roles of hydrogen in p-type SnS semiconductors"; Physical Chemistry Chemical Physics.
2018/05/11
Chris joined our group again and welcome back party was held.
2018/04/13
Welcom party for new members was held.
2018/04/01
Kasai, Yamamoto, Higuchi, Mori, Matsuo joined our group as Master Course.
2018/03/30
Profs. Kamiya, Katase and Ide gave presentations at the meeting of Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development.
2018/03/26
Ota and Futakado graduated.
2018/03/18
Prof. Ide was awarded from JSPS and gave an invited lecture at JSPS meeting
2018/03/07
Farewell party for Wu, Futakado, Ota was held.
2018/01/31
Publication Keisuke Ide et al., "Effects of Base Pressure on Growth and Optoelectronic Properties of Amorphous In‐Ga‐Zn‐O: Ultralow Optimum Oxygen Supply and Bandgap Widening"; physica status solidi (a) 2018, 1700832.
2018/01/31
Publication: Naoto Watanabe et al., "Multiple Color Inorganic Thin-Film Phosphor, RE-Doped Amorphous Gallium Oxide (RE: Pr, Sm, Tb, and Dy), Deposited at Room Temperature"; physica status solidi (a) 2018, 1700833.
2017/12/28
Bo-nen-kai was held.
2017/12/20
Prof. Ide was awarded from Materials and Structures Laboratory.
2017/12/06
Publication: Prof. Xiao published review paper :"Bandgap Optimization of Perovskite Semiconductors for Photovoltaic Applications" in Chemistry - A Europen Journal.
2017/12/01
Prof. Ide was awarded from JSAP as 講演奨励賞.
2017/11/23
Kobayashi (D1) gave presentation at ICAE2017.
2017/09/30
Prof. Kamiya, Katase and Ide gave presentations at ICMaSS2017. Prof. Ide was araded as Best Presentation Awards.
2017/09/14
Prof. Ide gave an invited lecture at IEICE meeting.
2017/09/06
Prof. Ide gave a presentation at JSAP.
2017/08/01
Watanabe (D1) and Koabayashi (D1) gave presentatino at STAC10.
2017/07/04
Prof. Ide was awarded from AMFPD-ECS.
2017/07/03
IGZO-TFT was posted on科学技術白書.
2017/07/03
Prof. Ide, Watanabe (D1), Ota (M2) and Futakado (M2) gave presentations at TOEO10. Futakado was awarded as Silver award.
2017/06/25
Watanabe (D1) was awarded from Ceramic Society Japan as 「ベスト質問賞」.
2017/05/25
Prof. Ide and Watanabe (D1)gave presentations at SID2017.
2017/05/24
Publication: Naoto Watanabe et al., "Amorphous Gallium Oxide as an Improved Host for Inorganic Light-Emitting Thin Film Semiconductor Fabricated at Room Temperature on Glass"; ECS J. Sol. State Sci. Technol. Vol. 6 (2017) P410.
2017/05/03
Publication: Haochun Tang et al., "Multiple Roles of Hydrogen Treatments in Amorphous In-Ga-Zn-O Films"; ECS J. Sol. State Sci. Technol.誌 Vol. 6 (2017) P365.
2017/04/11
Publication: Niedermeier Christian et al., "Electron effective mass and mobility limits in degenerate perovskite stannate BaSnO3"; Phys. Rev. B Rapid Communications Vol. 95 (2017) 161202(R).
2017/04/01
Prof. Takayoshi Katase joined our group as Associate Professor.
2017/04/01
Nishimagi, Watanabe and Kobayashi joined our group
2017/03/31
Kishida, Watanabe and Kobayashi graduated.
2017/03/10
Publication: Kim Jungwhan et al., "Conversion of an ultra-wide bandgap amorphous oxide insulator to a semiconductor"; NPG Asia Mater.誌 Vol. 9 (2017) p. e359.
2017/02/10
Kim Jungwhan was awarded as "井上研究奨励賞".
2017/02/10
Watanabe (M2) was awarded from Tokyo Tech. as "土肥賞".
2017/02/10
Publication: Kim Jungwhan et al., "Transparent amorphous oxide semiconductors for organic electronics: Application to inverted OLEDs"; Proc. Natl. Acad. Sci. USA誌 Vol. 114 (2017) 233.
2017/01/11
Publication: Keisuke Ide et al., "Effects of working pressure and annealing on bulk density and nanopore structures in amorphous In-Ga-Zn-O thin-film transistors"; Jpn. J. Appl. Phys. 56 (2017) 03BB03.
2016/12/15
Publication: Zewen Xiao et al., "Amorphous pnictide semiconductor BaZn2As2 exhibiting high hole mobility"; Appl. Phys. Lett. 109 (2016) 242105.
2016/11/04
Publication: Toshio Kamiya published review paper in Handbook of Visual Display Technology 2nd ed.
2016/10/21
Kobayashi (M2) and Watanabe (M2) gave presentations at TFMD.
2016/09/13
Kishida (M2) and Watanabe (M2) gave presentations at JSPS meeting at Nigata.
2016/09/07
Kobayashi (M2) gave a presentation at the meeting of Ceramic Society of Japan at Hiroshima.
2016/08/30
Niedermeier Christian went back to Imperial Colleage London.
2016/08/23
Watanabe (M2) gave a presentation at IMID2016, Korea.
2016/07/30
Niedermeier Christian joined our group again.
2016/07/06
Prof. Ide gave a presentation at AMFPD2016.
2016/05/30
Liang went back to her universtity.
2016/04/28
Publication: Christian A. Niedermeier et al., "Solid phase epitaxial growth of high mobility La:BaSnO3 thin films co-doped with interstitial hydrogen"; Appl. Phys. Lett. 108 (2016) 172101.
2016/04/11
Publication: Inoue et al., "Nonequilibrium Rock-Salt-Type Pb-Doped SnSe with High Carrier Mobilities ~ 300 cm2/(Vs)"; Chem. Mater. 28 (2016) 2278.
2016/04/01
Ota and Futakado joined our group as Master Course.
2016/03/31
Kim (D2) was awarded from JSPS as "講演奨励賞".
2016/03/28
Kim (D2), Tang (M2) and Xiao (D3) were awarded fro Tokyo Tech. as "土肥賞".
2016/03/31
Sekiya (M2) and Kikuchi (M2) graduated.
2016/03/31
Alumni association of Kawazoe-Hosono-Kamiya research group was held.
2016/03/25
Kishida was awarded from ITC2016 as "Best poster award".
2016/03/04
Publication: Haochun Tang et al., "Effects of thermal annealing on elimination of deep defects in amorphous In-Ga-Zn-O thin-film transistors"; Thin Solid Films 614 (2016) 73.
2016/03/03
Publication: Junghwan Kim et al., "Ultrawide band gap amorphous oxide semiconductor, Ga-Zn-O"; Thin Solid Films 614 (2016) 84.
2016/01/26
Publication: Zewen Xiao et al., "SnS thin films prepared by H2S-free process and its p-type thin film transistor"; AIP Adv. 6 (2016) 015112.
2016/01/11
Publication: Kim Junghwan et al., "Room-temperature fabrication of light-emitting thin films based on amorphous oxide semiconductor"; AIP Advances 6 (2016) 015106.
2016/05/01
Publication: Junghwan Kim et al., "Transparent amorphous oxide semiconductor thin film phosphor, In-Mg-O:Eu"; J. Cerm. Soc. Jpn. 124 (2016) 532.
2015/10/30
Kim Jungwhan (D2) was awarded from TFMD as "Student Award".
2015/10/20
Niedermeier Christian was awarded from TOEO10 as "Poster award".
2015/09/28
Liang (M1) joined our group.
2015/09/31
Tang (M2) graduated.
2015/08/18
Prof. Ide and Mr. Kim(D2) and Tang(M2) gave oral presentations at IMID2015.
2015/06/30
Doctoral defence of Xiao(D3) was held.