詳細は研究室メンバーのページにリンクされた九州大学の研究者情報やGoogle scholar等からも見ることができます。
太字：研究室メンバー ; [公開日] ：オンライン公開日
[2025年度]
Coexistence of Two Sphalerite Frameworks: A Vector for the Enhancement of Thermoelectric Performances in Zn-Doped Cu5Sn2S7
Lucas Le Gars*, Minati Tiadi, Sylvain Le Tonquesse, Bin Zhang, Thang Cong Tran, Youngkyu Kim, Chanhyeok Kim, Masato Yoshiya, Susumu Fujii, Carmelo Prestipino, Erik Elkaïm, Pierric Lemoine, Bernard Raveau, Koichiro Suekuni, Bernard Malaman, Gérard Le Caër, Thierry Schweitzer, Christophe Candolfi, Adèle Renaud, Xiaoyuan Zhou, Emmanuel Guilmeau*
Chem. Mater., 37, 5271-5285 (2025). [2025年6月28日公開]
https://doi.org/10.1021/acs.chemmater.5c00972
[2024年度]
Visualizing Thermal and Electrical Contacts in Thermoelectric Legs by Microscopic Lock-In Thermography
Yoshiaki Kinemuchi*, Masashi Mikami, Philipp Sauerschnig, Koichiro Suekuni, Ryoji Funahashi, Michihiro Ohta
ACS Appl. Electron. Mater., 7, 3115-3124 (2025). [2025年3月27日公開]
https://doi.org/10.1021/acsaelm.5c00366
A new quaternary sphalerite-derivative compound for thermoelectric applications: Cu7VSnS8
Shuya Kozai, Koichiro Suekuni*, Seiya Takahashi, Eiji Nishibori, Hidetaka Kasai, Ilaria Siloi, Marco Fornari, Hikaru Saito, Philipp Sauerschnig, Michihiro Ohta, Pierric Lemoine, Emmanuel Guilmeau, Bernard Raveau, Michitaka Ohtaki
J. Mater. Chem. A., 13, 10028-10036 (2025). [2025年3月11日公開]
https://doi.org/10.1039/D4TA08137D
Interaction between Cu–S-Based Sphalerite-like Frameworks and Interstitial Cations in Colusite-Based Thermoelectric Materials
Koichiro Suekuni*, Takashi Hagiwara, Susumu Fujii*, Shota Ochi, Seiya Takahashi, Eiji Nishibori, Hidetaka Kasai, Philipp Sauerschnig, Michihiro Ohta, Emmanuel Guilmeau, Kosuke Naemura, Masato Yoshiya, Michitaka Ohtaki
ACS Appl. Energy Mater., 8, 3563-3569 (2025). [2025年3月8日公開]
https://doi.org/10.1021/acsaem.4c03142
Morphology and Thermoelectric Performance of Bulk Sodium Tungsten Bronze Prepared via Low Energy-Consuming Route
Sasikan Maneeyom, Michitaka Ohtaki, Koichiro Suekuni
J. Ceram. Soc. Jpn., 133, 204-209 (2025). [2025年3月7日公開]
https://doi.org/10.2109/jcersj2.24118
Optimizing seebeck coefficient and thermoelectric efficiency via innovative Nb doping techniques in W18O49
Quy Nguyen Ngoc Le, Michitaka Ohtaki, Wisanu Pecharapa, Thang Bach Phan, Gerald Jeffrey Snyder, Cuong Chi Nguyen, Linh Nguyen Thi Ho, Nhu Hoa Thi Tran, Nhat Quang Minh Tran*
J. Alloys Compd., 1020, 179319 (2025). [2025年2月26日公開]
https://doi.org/10.1016/j.jallcom.2025.179319
[2023年度]
Effects of Si substitution on ferromagnetic order and off-center rattling of Eu ions in the type-I clathrate Eu8Ga16Ge30
Takahiro Onimaru, Shuhei Yamamoto, Marcos A. Avila, Koichiro Suekuni, Satoshi Tsutsui, Shugo Ikeda, Hisao Kobayashi,
Yoshitaka Yoda, Toshiro Takabatake
J. Mag. Mag. Mater., 588, 171379 (2023). [2023年10月13日公開]
https://doi.org/10.1016/j.jmmm.2023.171379
Spark plasma sintering on the thermoelectric sulfide Ta2PdS6
Akitoshi Nakano*, Koichiro Suekuni, Nanako Hattori, and Ichiro Terasaki
J. Ceram. Soc. Jpn., 131, 669-674 (2023). [2023年10月1日公開]
https://doi.org/10.2109/jcersj2.23038
Pseudobinary Approach to the Discovery and Design of Copper Based Sulfides
Takashi Hagiwara, Koichiro Suekuni,* Pierric Lemoine,* Carmelo Prestipino, Erik Elkaim, Andrew R. Supka, Rabih Al Rahal Al Orabi, Marco Fornari,* Emmanuel Guilmeau,* Bernard Raveau, Hikaru Saito, Philipp Sauerschnig, Michihiro Ohta, Yui Kanemori, and Michitaka Ohtaki
Chem. Mater., 35, 7554-7563 (2023). [2023年9月14日公開]
https://doi.org/10.1021/acs.chemmater.3c01135
Mechanical Compatibility between Mg3(Sb,Bi)2 and MgAgSb in Thermoelectric Modules
Yifan Sun,* Jiahui Fu, Yuji Ohishi, Keita Toh, Koichiro Suekuni, Kunihiro Kihou, Ushin Anazawa, Chul-Ho Lee, and Ken Kurosaki
ACS Appl. Mater. Interfaces, 15, 23246-23254 (2023). [2023年5月5日公開]
https://doi.org/10.1021/acsami.3c02544
[2022年度]
Engineering Transport Properties in Interconnected EnargiteStannite Type Cu2+xMn1-xGeS4 Nanocomposites
V. Pavan Kumar, S. Passuti, B. Zhang, S. Fujii, K. Yoshizawa, P. Boullay, S. Le Tonquesse, C. Prestipino, B. Raveau, P. Lemoine, A. Paecklar, N. Barrier, X. Zhou, M. Yoshiya, K. Suekuni, and E. Guilmeau*
Angew. Chem. Int. Ed., 61, e202210600 (2022). [2022年9月13日公開]
https://doi.org/10.1002/anie.202210600
Characterization of ZnO thermoelectric ceramics and their microstructures consolidated by two-step spark plasma sintering
Ahrong Jeong, Michitaka Ohtaki, Byung-Koog Jang*
J. Ceram. Soc. Jpn., 130, 889-894 (2022). [2022年7月1日公開]
http://doi.org/10.2109/jcersj2.22097
An effective synthesis route for high-performance a-MgAgSb thermoelectric material
Keita Toh, Koichiro Suekuni*, Katsuaki Hashikuni, Hirotaka Nishiate, Ushin Anazawa, Chul-Ho Lee, and Michitaka Ohtaki
J. Mater. Sci., 57, 11265–11273, (2022). [2022年5月26日公開]
https://doi.org/10.1007/s10853-022-07306-5
[2021年度]
Thermoelectric performance of In and Ga single/dual-doped ZnO ceramics fabricated by spark plasma sintering
Ahrong Jeong, Michitaka Ohtaki, Byung-Koog Jang*
Ceram. Int., 48, 14414-14423 (2022). [2022年2月3日公開]
https://doi.org/10.1016/j.ceramint.2022.01.334
Cu–S-based thermoelectric compounds with a sphalerite-derived disordered crystal structure
Shota Hirayama, Koichiro Suekuni*, Philipp Sauerschnig, Michihiro Ohta, Michitaka Ohtaki
J. Solid State Chem., 309 122960, (2022). [2022年2月3日公開]
https://doi.org/10.1016/j.jssc.2022.122960
A prototype thermoelectric module based on p-type colusite together with n-type nanostructured PbTe for power generation
Raju Chetty, Priyanka Jood*, Masayuki Murata, Koichiro Suekuni, and Michihiro Ohta*
Appl. Phys. Lett., 120, 013501 (2022). [2022年1月3日公開]
https://doi.org/10.1063/5.0077154
Temperature dependence thermal conductivity measurement of indium-gallium-zinc-oxide thin films utilizing 3ω Method
Rauf Khan, Shim Chang-Hoon, Reiji Hattori, M. Ohtaki, K. Miyazaki
Proc. Int. Disp. Workshops, 27, 162-165 (2021).
High-temperature thermoelectric performance of (W1-xTix)18O49
Nhat Quang Minh Tran, Michitaka Ohtaki*, Koichiro Suekuni
J. Eur. Ceram. Soc.,42, 1486-1492 (2022). [2021年12月7日公開]
https://doi.org/10.1016/j.jeurceramsoc.2021.12.014
Back-Channel Etched In-Ga-Zn-O Thin-Film Transistor Utilizing Selective Wet-Etching of Copper Source and Drain
Rauf Khan*, Muhamad Affiq Bin Misran, Michitaka Ohtaki, Jun Tae Song, Tatsumi Ishihara, and Reiji Hattori
Processes, 9, 2193 (2021). [2021年12月6日公開]
https://www.mdpi.com/2227-9717/9/12/2193
Local-Disorder-Induced Low Thermal Conductivity in Degenerate Semiconductor Cu22Sn10S32
Ventrapati Pavan Kumar, Pierric Lemoine,* Virginia Carnevali, Gabin Guélou, Oleg I. Lebedev, Bernard Raveau, Rabih Al Rahal Al Orabi, Marco Fornari,* Christophe Candolfi, Carmelo Prestipino, Denis Menut, Bernard Malaman, Jean Juraszek, Koichiro Suekuni, and Emmanuel Guilmeau*
Inorg. Chem., 60, 16273-16285 (2021). [2021年10月13日公開]
https://doi.org/10.1021/acs.inorgchem.1c02105
Microwave synthesis of ZnO microcrystals with novel asymmetric morphology
Wojciech Klich, Miki Inada, Hongy Gao, Hikaru Saito, Michitaka Ohtaki*
Adv. Powder Technol., 32, 4356–4363 (2021). [2021年10月9日公開]
https://doi.org/10.1016/j.apt.2021.09.038
Synergistic Effect of Chemical Substitution and Insertion on the Thermoelectric Performance of Cu26V2Ge6S32 Colusite
Yuta Shimizu, Koichiro Suekuni,* Hikaru Saito, Pierric Lemoine, Emmanuel Guilmeau, Bernard Raveau, Raju Chetty, Michihiro Ohta, Toshiro Takabatake, and Michitaka Ohtaki
Inorg. Chem., 60, 11364-11373 (2021). [2021年7月16日公開]
https://doi.org/10.1021/acs.inorgchem.1c01321
Thermoelectric quaternary sulfide Cu2+xZn1-xSnS4 (x =0–0.3): Effects of Cu substitution for Zn
Bui Duc Long*, Le Hong Thang, Nguyen Hong Hai, Koichiro Suekuni, Katsuaki Hashikuni, Tran Quang Minh Nhat, Wojciech Klich, Michitaka Ohtaki
Mater. Sci. Eng. B, 272, 115353 (2021). [2021年7月6日公開]
https://doi.org/10.1016/j.mseb.2021.115353
Rapid Synthesis of W18O49 via Reactive Spark Plasma Sintering with Controlled Anisotropic Thermoelectric Properties
Nhat Quang Minh Tran, Michitaka Ohtaki*, Koichiro Suekuni
Evergreen, 8, 344-350 (2021). [2021年6月]
https://doi.org/10.5109/4480715
Thermal Conductivity of Nano-Crystallized Indium-Gallium-Zinc Oxide Thin Films Determined by Differential Three-Omega Method
Rauf Khan*, Michitaka Ohtaki, Satoshi Hata, Koji Miyazaki, Reiji Hattori,
Nanomaterials, 11, 1547 (2021). [2021年6月11日公開]
https://doi.org/10.3390/nano11061547
Thermoelectric properties of In- and Ga-doped spark plasma sintered ZnO ceramics
Ahrong Jeong, Koichiro Suekuni, Michitaka Ohtaki, Byung-Koog Jang*
Ceram. Int., 47, 23927–23934 (2021). [2021年5月19日公開]
https://doi.org/10.1016/j.ceramint.2021.05.101
Key Role of d0 and d10 Cations for the Design of Semiconducting Colusites: Large Thermoelectric ZT in Cu26Ti2Sb6S32 Compounds
Takashi Hagiwara, Koichiro Suekuni,* Pierric Lemoine, Andrew R. Supka, Raju Chetty, Emmanuel Guilmeau,* Bernard Raveau, Marco Fornari, Michihiro Ohta, Rabih Al Rahal Al Orabi, Hikaru Saito, Katsuaki Hashikuni, and Michitaka Ohtaki
Chem. Mater., 33, 3449–3456 (2021). [2021年4月28日公開]
https://doi.org/10.1021/acs.chemmater.1c00872
[2020年度]
Thermoelectric properties of Mo-doped bulk In2O3 and prediction of its maximum ZT
Wojciech Klich, Michitaka Ohtaki*
Ceram. Int., 47, 18116-18121 (2021). [2021年3月19日公開]
https://doi.org/10.1016/j.ceramint.2021.03.129
A comparative study of thermoelectric Cu2TrTi3S8 (Tr = Co and Sc) thiospinels: Enhanced Seebeck coefficient via electronic structure modification
Katsuaki Hashikuni*, Koichiro Suekuni*, Hidetomo Usui, Raju Chetty, Michihiro Ohta, Toshiro Takabatake, and Michitaka Ohtaki
J. Alloys Compd., 871, 159548 (2021). [2021年3月17日公開]
https://doi.org/10.1016/j.jallcom.2021.159548
Transport properties and electronic density-of-states of Zn-doped colusite Cu26Cr2Ge6S32
Ventrapati Pavan Kumar, Sunanda Mitra, Gabin Guélou, Andrew R. Supka, Pierric Lemoine, Bernard Raveau, Rabih Al Rahal Al Orabi, Marco Fornari*, Koichiro Suekuni, Emmanuel Guilmeau*
Appl. Phys. Lett. 117, 173902 (2020). [2020年10月29日公開]
https://doi.org/10.1063/5.0023712
Pressure-induced quenching of planar rattling in studied by specific heat and x-ray diffraction measurements
Kazunori Umeo*, Koichiro Suekuni, Toshiro Takabatake, Eiji Nishibori
Phys. Rev. B, 102, 100302(R) (2020). [2020年9月8日公開]
https://doi.org/10.1103/PhysRevB.102.100302
Thermoelectric figure of merit enhancement in cement composites with graphene and transition metal oxides
Sampad Ghosh, Sivasankaran Harish, Michitaka Ohtaki, Bidyut Baran Saha*
Mater. Today Energy, 18, 100492 (2020). [2020年8月3日公開]
https://doi.org/10.1016/j.mtener.2020.100492
Effects of multi-scale defects on the thermoelectric properties of delafossite CuCr1-xMgxO2 materials
Dung Van Hoang, Anh Tuan Thanh Pham, Hanh Kieu Thi Ta, Truong Huu Nguyen, Ngoc Kim Pham, Lai Thi Hoa, Vinh Cao Tran, Ohtaki Michitaka, Quang Minh Nhat Tran, Jong-Ho Park, Jae-Ki Lee, Su-Dong Park,Tae-Seong Ju, Hongjun Park, Sungkyun Park, Thang Bach Phan*
J. Alloys Compd, 844, 156119 (2020). [2020年6月25日公開]
https://doi.org/10.1016/j.jallcom.2020.156119
Highly improved thermoelectric performance of Nb-doped SrTiO3 due to significant suppression of phonon thermal conduction by synergetic effects of pores and metallic nanoparticles
Shinji Hirata, Michitaka Ohtaki*, Kosuke Watanabe
Ceram. Int., 46, 25964-25969 (2020). [2020年7月21日公開]
https://doi.org/10.1016/j.ceramint.2020.07.085
Toppling the Transport Properties with Cationic Overstoichiometry in Thermoelectric Colusite: [Cu26Cr2Ge6]1+δS32
Gabin Guélou, Ventrapati Pavan Kumar, Abdelhamid Bourhim, Pierric Lemoine, Bernard Raveau, Andrew Supka, Oleg I. Lebedev, Rabih Al Rahal Al Orabi, Marco Fornari, Koichiro Suekuni, Emmanuel Guilmeau*
ACS Appl. Energy Mater., 3, 4180–4185 (2020). [2020年4月30日公開]
https://doi.org/10.1021/acsaem.0c00726
Enargite Cu3PS4: A Cu–S‐Based Thermoelectric Material with a Wurtzite‐Derivative Structure
Takuya Tanimoto, Koichiro Suekuni*, Taiki Tanishita, Hidetomo Usui, Terumasa Tadano, Taiga Kamei, Hikaru Saito, Hirotaka Nishiate, Chul Ho Lee, Kazuhiko Kuroki, Michitaka Ohtaki
Advanced Functional Materials 30, 2000973 (2020). [2020年4月6日公開]
https://doi.org/10.1002/adfm.202000973
[2019年度]
Simultaneous Enhancement in the Electrical Conductivity and Reduction in the Lattice Thermal Conductivity Leading to Enhanced Thermoelectric ZT Realized by Incorporation of Metallic Nanoparticles into Oxide Matrix
Shinji Hirata, Michitaka Ohtaki
Evergreen, 7, 1-6 (2020). [2020年3月公開]
https://doi.org/10.5109/2740934
Enhancement of the thermoelectric power factor by tuning the carrier concentration in Cu-rich and Ge-poor colusites Cu26+xNb2Ge6-xS32
Yohan Bouyrie, Raju Chetty, Koichiro Suekuni, Noriyuki Saitou, Priyanka Jood, Noriko Yoshizawa, Toshiro Takabatake, Michihiro Ohta
J. Mater. Chem. C, 8, 6442-6449 (2020). [2020年3月21日公開]
https://doi.org/10.1039/D0TC00508H
Enhanced figure of merit of cement composites with graphene and ZnO nanoinclusions for efficient energy harvesting in buildings
Sampad Ghosh, Sivasankaran Harish, Michitaka Ohtaki, Bidyut Baran Saha
Energy, 198, 117396 (2020). [2020年3月16日公開]
https://doi.org/10.1016/j.energy.2020.117396
Disorder-driven glasslike thermal conductivity in colusite Cu26V2Sn6S32 investigated by Mössbauer spectroscopy and inelastic neutron scattering
Christophe Candolfi, Gabin Guélou, Cédric Bourgès, Andrew R. Supka, Rabih Al Rahal Al Orabi, Marco Fornari, Bernard Malaman, Gérard Le Caër, Pierric Lemoine, Vincent Hardy, Jean-Marc Zanotti, Raju Chetty, Michihiro Ohta, Koichiro Suekuni, Emmanuel Guilmeau*
Phys. Rev. Materials, 4, 025404 (2020).
https://doi.org/10.1103/PhysRevMaterials.4.025404
Precursor of Metal–Semiconductor Transition in Tetrahedrite Probed by Cu-NMR
Takashi Matsui, Haruki Matsuno, Hisashi Kotegawa, Hideki Tou, Koichiro Suekuni, Takumi Hasegawa, Hiromi I. Tanaka, Toshiro Takabatake
JPS Conf. Proc., 30, 011075 (2020).
https://doi.org/10.7566/JPSCP.30.011075
Zn-Substitution Effect on Metal-Semiconductor Transition in Tetrahedrite Cu12Sb4S13
Takashi Matsui, Haruki Matsuno, Hisashi Kotegawa, Hideki Tou, Koichiro Suekuni, Takumi Hasegawa, Hiromi I. Tanaka, Toshiro Takabatake
JPS Conf. Proc., 29, 013008 (2020)
https://doi.org/10.7566/JPSCP.29.013008
Multi-scale defects in ZnO thermoelectric ceramic materials co-doped with In and Ga
Anh Tuan Thanh Pham, Tuyen Anh Luu, Ngoc Kim Pham, Hanh Kieu Thi Ta, Truong Huu Nguyen, Dung Van Hoang, Hoa Thi Lai, Vinh Cao Tran, Jong-Ho Park, Jae-Ki Lee, Sungkyun Park, Ohtaki Michitaka, Su-Dong Park, Hung Quang Nguyen, Thang Bach Phan*
Ceram. Int., 46, 10748-10758 (2020). [2020年1月13日公開]
https://doi.org/10.1016/j.ceramint.2020.01.084
A strategy for boosting the thermoelectric performance of famatinite Cu3SbS4
Taiki Tanishita, Koichiro Suekuni*, Hirotaka Nishiate, Chul-Ho Lee, Michitaka Ohtaki
Phys. Chem. Chem. Phys., 22, 2081-2086 (2020). [2019年12月30日公開]
https://doi.org/10.1039/C9CP06233E
Pressure-Induced Collapse of the Guest Eu Off-Centering in Type-I Clathrate Eu8Ga16Ge30
Naoki Ishimatsu*, Kei Yokoyama, Takahiro Onimaru, Toshiro Takabatake, Koichiro Suekuni, Naomi Kawamura, Satoshi Tsutsui, Masaichiro Mizumaki, Toshiaki Ina, Tetsu Watanuki, Vera Cuartero, Olivier Mathon, Sakura Pascarelli, Eiji Nishibori, Tetsuo Irifune
J. Phys. Soc. Jpn., 88, 114601 (2019). [2019年10月10日]
https://doi.org/10.7566/JPSJ.88.114601
Graphene enhanced thermoelectric properties of cement based composites for building energy harvesting
Sampad Ghosh, Sivasankaran Harish, Kaiser Ahmed Rocky, Michitaka Ohtaki, Bidyut Baran Saha
Energy Build, 202, 109419 (2019). [2019年9月12日公開]
https://doi.org/10.1016/j.enbuild.2019.109419
Copper-Rich Thermoelectric Sulfides: Size-Mismatch Effect and Chemical Disorder in the [TS4]Cu6 Complexes of Cu26T2Ge6S32 (T=Cr, Mo, W) Colusites
Ventrapati Pavan Kumar, Gabin Guélou, Pierric Lemoine, Bernard Raveau, Andrew R. Supka, Rabih Al Rahal Al Orabi*, Prof. Marco Fornari*, Dr. Koichiro Suekuni, Dr. Emmanuel Guilmeau*
Angew. Chem. Int. Ed., 58, 15455–15463 (2019). [2019年8月16日]
https://doi.org/10.1002/anie.201908579
Low-Temperature Structural Phase Transitions in Thermoelectric Tetrahedrite, Cu12Sb4S13, and Tennantite, Cu12As4S13
Venkatesha R. Hathwar, Atsushi Nakamura, Hidetaka Kasai, Koichiro Suekuni, Hiromi I. Tanaka, Toshiro Takabatake, Bo B. Iversen, Eiji Nishibori*
Cryst. Growth Des., 19, 7, 3979–3988 (2019). [2019年5月22日]
https://doi.org/10.1021/acs.cgd.9b00385
Electronic structure and thermoelectric properties of Sn1.2−xNbxTi0.8S3 with a quasi-one-dimensional structure [Editor’s Pick]
Koichiro Suekuni, Hidetomo Usui, Siying Qiao, Katsuaki Hashikuni; Tatsuya Hirano, Hirotaka Nishiate, Chul-Ho Lee, Kazuhiko Kuroki, Kosuke Watanabe, Michitaka Ohtaki
J. Appl. Phys., 125, 175111 (2019). [2019年5月6日]
https://doi.org/10.1063/1.5093183
First-Order Metal–Semiconductor Transition Triggered by Rattling Transition in Tetrahedrite Cu12Sb4S13: Cu-Nuclear Magnetic Resonance Studies
Takashi Matsui, Haruki Matsuno, Hisashi Kotegawa, Hideki Tou, Koichiro Suekuni, Takumi Hasegawa, Hiromi I. Tanaka, and Toshiro Takabatake
J. Phys. Soc. Jpn., 88, 054710 (2019). [2019年4月22日]
https://doi.org/10.7566/JPSJ.88.054710
Power generation from the Cu26Nb2Ge6S32-based single thermoelectric element with Au diffusion barrier
Raju Chetty, Yuta Kikuchi, Yohan Bouyrie, Priyanka Jood, Atsushi Yamamoto, Koichiro Suekuni, Michihiro Ohta
J. Mater. Chem. C, 7, 5184-5192 (2019). [2019年4月2日公開]
https://doi.org/10.1039/C9TC00868C
[2018年度]
Cu 2p-1s x-ray emission spectroscopy of mineral tetrahedrite Cu12Sb4S13
Hitoshi Sato*, Toshiki Nagasaki, Koichiro Suekuni, Hiromi I. Tanaka, Awabaikeli Rousuli, Shogo Nakamura, Naomi Kawamura, Xu-Guang Zheng, Takenori Fujii, Toshiro Takabatake
Radiat. Phys. Chem., 175, 108148 (2020). [2019年2月2日公開]
https://doi.org/10.1016/j.radphyschem.2019.02.007
Thermoelectric Properties and Electronic Structures of CuTi2S4 Thiospinel and Its Derivatives: Structural Design for Spinel-Related Thermoelectric Materials
Katsuaki Hashikuni*, Koichiro Suekuni*, Hidetomo Usui, Raju Chetty, Michihiro Ohta, Kazuhiko Kuroki, Toshiro Takabatake, Kosuke Watanabe, Michitaka Ohtaki
Inorg. Chem., 58,1425–1432 (2019). [2019年1月8日公開]
https://doi.org/10.1021/acs.inorgchem.8b02955
Carrier concentration tuning in thermoelectric thiospinel Cu2CoTi3S8 by oxidative extraction of copper
Katsuaki Hashikuni, Koichiro Suekuni, Kosuke Watanabe, Yohan Bouyrie, Michihiro Ohta, Michitaka Ohtaki, Toshiro Takabatake
J. Solid State Chem., 259, 5-10 (2018). [2018年12月26日公開]
https://www.sciencedirect.com/science/article/pii/S0022459617305194
High Power Factors of Thermoelectric Colusites Cu26T2Ge6S32 (T = Cr, Mo, W): Toward Functionalization of the Conductive “Cu–S” Network
Ventrapati Pavan Kumar, Andrew R. Supka, Pierric Lemoine, Oleg I. Lebedev, Bernard Raveau, Koichiro Suekuni, Vivian Nassif, Rabih Al Rahal Al Orabi*, Marco Fornari*, Emmanuel Guilmeau*
Adv. Energy Mater., 9, 1803249 (2019). [2018年12月17日公開]
https://doi.org/10.1002/aenm.201803249
Atomic-scale phonon scatterers in thermoelectric colusites with a tetrahedral framework structure
Koichiro Suekuni*, Yuta Shimizu, Eiji Nishibori, Hidetaka Kasai , Hikaru Saito, Daichi Yoshimoto, Katsuaki Hashikuni, Yohan Bouyrie, Raju Chetty, Michihiro Ohta, Emmanuel Guilmeau, Toshiro Takabatake, Kosuke Watanabe, Michitaka Ohtaki
J. Mater. Chem. A, 7, 228-235 (2019). [2018年11月28日公開]
https://doi.org/10.1039/C8TA08248K
Static and dynamic structures of liquid Ba8Ga16Sn30: a melt of the thermoelectric clathrate compounds
M Inui*, K Suekuni, Y Kajihara, S Hosokawa, T Takabatake, Y Nakajima, K Matsuda, K Ohara, H Uchiyama and S Tsutsui
J. Phys.: Condens. Matter, 30 455101 (2018). [2018年10月18日公開]
https://iopscience.iop.org/article/10.1088/1361-648X/aae3f3
Influence of supercritical drying on thermoelectric properties of Zinc Oxide
Wojciech Jacek Klich, Michitaka Ohtaki*
Proceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES), 4, 84-87 (2018). [2018年10月18日]
https://doi.org/10.15017/1961291
Low Thermal Conductivity of RE-Doped SrO(SrTiO3)1 Ruddlesden Popper Phase Bulk Materials Prepared by Molten Salt Method
Yulia Eka Putri, Suhana Mohd Said, Refinel Refinel, Michitaka Ohtaki, Syukri Syukri
Electron. Mater. Lett., 14, 556–562, (2018). [2018年4月11日]
https://link.springer.com/article/10.1007/s13391-018-0062-x
[2017年度]
Retreat from Stress: Rattling in a Planar Coordination
Koichiro Suekuni*, Chul Ho Lee*, Hiromi I. Tanaka, Eiji Nishibori, Atsushi Nakamura, Hidetaka Kasai, Hitoshi Mori, Hidetomo Usui, Masayuki Ochi, Takumi Hasegawa, Mitsutaka Nakamura, Seiko Ohira-Kawamura, Tatsuya Kikuchi, Koji Kaneko, Hirotaka Nishiate, Katsuaki Hashikuni, Yasufumi Kosaka, Kazuhiko Kuroki, Toshiro Takabatake
Adv. Mater., 30, 1706230 (2018). [2018年2月1日]
https://advanced.onlinelibrary.wiley.com/doi/full/10.1002/adma.201706230
High-Performance Thermoelectric Bulk Colusite by Process Controlled Structural Disordering
Cédric Bourgès, Yohan Bouyrie, Andrew R. Supka, Rabih Al Rahal Al Orabi*, Pierric Lemoine, Oleg I. Lebedev, Michihiro Ohta, Koichiro Suekuni, Vivian Nassif, Vincent Hardy, Ramzy Daou, Yuzuru Miyazaki, Marco Fornari*, Emmanuel Guilmeau*
J. Am. Chem. Soc., 140, 2186–2195 (2018). [2018年1月14日]
https://doi.org/10.1021/jacs.7b11224
Addition of Co, Ni, Fe and their role in the thermoelectric properties of colusite Cu26Nb2Ge6S32
Yohan Bouyrie, Michihiro Ohta*, Koichiro Suekuni, Priyanka Jood, Toshiro Takabatake
J. Alloys Compd., 735, 1838-1845 (2018). [2017年11月21日]
https://www.sciencedirect.com/science/article/pii/S0925838817339695
[2016年度]
Enhancement in the thermoelectric performance of colusites Cu26A2E6S32 (A = Nb, Ta; E = Sn, Ge) using E-site non-stoichiometry
Yohan Bouyrie, Michihiro Ohta*, Koichiro Suekuni, Yuta Kikuchi, Priyanka Jood, Atsushi Yamamoto, Toshiro Takabatake
J. Mater. Chem. C, 5, 4174-4184 (2017). [2017年3月27日]
https://doi.org/10.1039/C7TC00762K
Effects of Ge and Sn substitution on the metal–semiconductor transition and thermoelectric properties of Cu12Sb4S13 tetrahedrite
Yasufumi Kosaka, Koichiro Suekuni*, Katsuaki Hashikuni, Yohan Bouyrie, Michihiro Ohta, Toshiro Takabatake
Phys. Chem. Chem. Phys., 19, 8874-8879 (2017). [2017年3月6日]
https://doi.org/10.1039/C7CP00351J
Clathrate-Based Thermoelectrics
Toshiro Takabatake*, Koichiro Suekuni
Materials Aspect of Thermoelectricity, Chap. 6 (2016). [2016年11月25日]
https://doi.org/10.1201/9781315197029
High power factor in thiospinels Cu2TrTi3S8 (Tr= Mn, Fe, Co, Ni) arising from TiS6 octahedron network
K Hashikuni, K Suekuni*, H Usui, M Ohta, K Kuroki, T Takabatake
Appl. Phys. Lett., 109, 182110 (2016). [2016年10月21日]
https://doi.org/10.1063/1.4966955
Research Update: Cu–S based synthetic minerals as efficient thermoelectric materials at medium temperatures
Koichiro Suekuni*, Toshiro Takabatake
APL Mater., 4, 104503 (2016). [2016年6月16日]
https://doi.org/10.1063/1.4955398
Tuning the charge carrier density in the thermoelectric colusite
Fiseong S. Kim, Koichiro Suekuni*, Hirotaka Nishiate, Michihiro Ohta, Hiromi I. Tanaka, Toshiro Takabatake
J. Appl. Phys., 119, 175105 (2016). [2016年4月20日]
https://doi.org/10.1063/1.4948475
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