ITARU OSAKA

Last Updated :2024/02/02

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Professor
Web Site
E-mail
iosakahiroshima-u.ac.jp
Self-introduction
My research interest includes molecular design and synthesis of functional conjugated polymers, self-assembly, and printable organic thin-film devices such as field-effect transistors and solar cells.

Basic Information

Major Professional Backgrounds

  • 2006/02, 2009/03, Carnegie Mellon University, Department of Chemistry, Postdoctoral Researcher
  • 2009/04/01, 2013/03/31, Hiroshima University, Graduate School of Engineering, Assistant Professor
  • 2013/04, 2016/09, Institute of Physical and Chemical Research
  • 2016/10/01, 2020/03/31, Hiroshima University, Institute of Engineering, Professor
  • 2002/04, 2006/01, Fujifilm, Research Scientist

Educational Backgrounds

  • University of Tsukuba, Japan, 1993/04, 1997/03
  • University of Tsukuba, Japan, 1997/04, 2002/03

Academic Degrees

  • Ph. D, University of Tsukuba

Educational Activity

  • [Bachelor Degree Program] School of Engineering : Cluster 3(Applied Chemistry, Biotechnology and Chemical Engineering) : Program of Applied Chemistry
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Applied Chemistry Program
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Smart Innovation Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Applied Chemistry Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Smart Innovation Program

Research Fields

  • Chemistry;Materials chemistry;Organic and hybrid materials
  • Chemistry;Materials chemistry;Polymer / Textile materials
  • Chemistry;Applied chemistry;Energy-related chemistry
  • Chemistry;Materials chemistry;Device related chemistry

Research Keywords

  • Organic functional materials Conjugated polymers Next generation photovoltaics Printed electronics

Affiliated Academic Societies

  • The Chemical Society of Japan, The Society of Polymer Science Japan, Japan Society of Applied Physics, The Society of Photopolymer Science and Technology, American Chemical Society, Materials Research Society

Educational Activity

Course in Charge

  1. 2023, Liberal Arts Education Program1, 1Term, Carbon-neutral Science and Technology
  2. 2023, Undergraduate Education, 4Term, Basic Organic Chemistry II
  3. 2023, Undergraduate Education, 2Term, Introduction to Fundamental Industry
  4. 2023, Undergraduate Education, 1Term, Organometallic Chemistry
  5. 2023, Graduate Education (Master's Program) , 1Term, Special Exercises on Applied Chemistry A
  6. 2023, Graduate Education (Master's Program) , 2Term, Special Exercises on Applied Chemistry A
  7. 2023, Graduate Education (Master's Program) , 3Term, Special Exercises on Applied Chemistry B
  8. 2023, Graduate Education (Master's Program) , 4Term, Special Exercises on Applied Chemistry B
  9. 2023, Graduate Education (Master's Program) , Academic Year, Special Study on Applied Chemistry
  10. 2023, Graduate Education (Master's Program) , 3Term, Polymer Materials Chemistry
  11. 2023, Graduate Education (Master's Program) , 2Term, Polymer Materials Chemistry
  12. 2023, Graduate Education (Doctoral Program) , Academic Year, Special Study on Applied Chemistry
  13. 2023, Graduate Education (Doctoral Program) , Academic Year, Special Study on Applied Chemistry
  14. 2023, Graduate Education (Master's Program) , 1Term, Sustainability Materials Science

Research Activities

Academic Papers

  1. Naphthobisthiadiazole-Based pi-Conjugated Polymers for Nonfullerene Solar Cells: Suppressing Intermolecular Interaction Improves Photovoltaic Performance, ACS APPLIED MATERIALS & INTERFACES, 14(12), 14400-14409, 20220330
  2. Naphthobispyrazine Bisimide: A Strong Acceptor Unit for Conjugated Polymers Enabling Highly Coplanar Backbone, Short pi - pi Stacking, and High Electron Transport, CHEMISTRY OF MATERIALS, 34(6), 2717-2729, 20220322
  3. Dithiazolylthienothiophene Bisimide: A Novel Electron-Deficient Building Unit for N-Type Semiconducting Polymers, ACS APPLIED MATERIALS & INTERFACES, 11(26), 23410-23416, 20190604
  4. Synthesis and Characterization of an Alkoxythiazole-thiazolothiazole Semiconducting Polymer for Organic Solar Cells, ELECTROCHEMISTRY, 85(5), 266-271, 2017
  5. ★, Naphthobischalcogenadiazole Conjugated Polymers: Emerging Materials for Organic Electronics, ADVANCED MATERIALS, 29(25), 1605218, 20170705
  6. Naphthobispyrazine as an Electron-deficient Building Unit for pi-Conjugated Polymers: Efficient Synthesis and Polymer Properties, CHEMISTRY LETTERS, 46(8), 1193-1196, 20170530
  7. Impact of side chain placement on thermal stability of solar cells in thiophene-thiazolothiazole polymers, JOURNAL OF MATERIALS CHEMISTRY C, 6(14), 3668-3674, 20180414
  8. ★, Advances in molecular design and synthesis of regioregular polythiophenes, ACCOUNTS OF CHEMICAL RESEARCH, 41(9), 1202-1214, 2008
  9. ★, Efficient inverted polymer solar cells employing favourable molecular orientation, NATURE PHOTONICS, 9(6), 403, 2015
  10. ★, High-efficiency polymer solar cells with small photon energy loss, NATURE COMMUNICATIONS, 6, 10085, 2015
  11. Correlation between Distribution of Polymer Orientation and Cell Structure in Organic Photovoltaics, ACS APPLIED MATERIALS & INTERFACES, 10(38), 32420-32425, 20180917
  12. A Thiazolothiazole-Based Semiconducting Polymer with Well-Balanced Hole and Electron Mobilities, APPLIED SCIENCES, 9(3), 20190129
  13. Ester-Functionalized Naphthobispyrazine as an Acceptor Building Unit for Semiconducting Polymers: Synthesis, Properties, and Photovoltaic Performance, MACROMOLECULES, 52(10), 3909-3917, 20190514
  14. ★, Impact of Isomeric Structures on Transistor Performances in Naphthodithiophene Semiconducting Polymers, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 133, 6852-6860, 2011
  15. ★, Drastic Change of Molecular Orientation in a Thiazolothiazole Copolymer by Molecular-Weight Control and Blending with PC61BM Leads to High Efficiencies in Solar Cells, ADVANCED MATERIALS, 24, 425-430, 2012
  16. ★, Synthesis, Characterization, and Transistor and Solar Cell Applications of a Naphthobisthiadiazole-Based Semiconducting Polymer, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 134, 3498-3507, 2012
  17. ★, Naphthodithiophene-Naphthobisthiadiazole Copolymers for Solar Cells: Alkylation Drives the Polymer Backbone Flat and Promotes Efficiency, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 135, 8834-8837, 2013
  18. ★, Thiophene–Thiazolothiazole Copolymers: Significant Impact of Side Chain Composition on Backbone Orientation and Solar Cell Performances, ADVANCED MATERIALS, 26, 331-338, 2014
  19. ★, Implication of Fluorine Atom on Electronic Properties, Ordering Structures, and Photovoltaic Performance in Naphthobisthiadiazole- Based Semiconducting Polymers, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 138, 10265-10275, 2016
  20. Understanding Comparable Charge Transport Between Edge-on and Face-on Polymers in a Thiazolothiazole Polymer System, ACS APPLIED POLYMER MATERIALS, 1(6), 1257-1262, 20190429
  21. ★, Impact of Noncovalent Sulfur-Fluorine Interaction Position on Properties, Structures, and Photovoltaic Performance in Naphthobisthiadiazole-Based Semiconducting Polymers, ADVANCED ENERGY MATERIALS, 10(7), 202002
  22. Dithiazolylthienothiophene Bisimide-Based pi-Conjugated Polymers: Improved Synthesis and Application to Organic Photovoltaics as P-Type Semiconductor, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 93(4), 561-567, 202002
  23. Effect of Spacer Length in Naphthobispyrazine-Based pi-Conjugated Polymers on Properties, Thin Film Structures, and Photovoltaic Performances, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 93(8), 949-957, 202005
  24. pi-Conjugated polymers and molecules enabling small photon energy loss simultaneously with high efficiency in organic photovoltaics, JOURNAL OF MATERIALS CHEMISTRY A, 8(39), 20213-20237, 20201021
  25. Small-bandgap quinoid-based p-conjugated polymers, JOURNAL OF MATERIALS CHEMISTRY C, 8(41), 14262-14288, 20201107
  26. Significantly Sensitized Ternary Blend Polymer Solar Cells with a Very Small Content of the Narrow-Band Gap Third Component That Utilizes Optical Interference, MACROMOLECULES, 53(23), 10623-10635, 20201208
  27. N-type Semiconducting Polymers Based on Dicyano Naphthobisthiadiazole: High Electron Mobility with Unfavorable Backbone Twist, CHEMISTRY OF MATERIALS, 33(6), 2218-2228, 20210323
  28. Bithiazole Dicarboxylate Ester: An Easily Accessible Electron-Deficient Building Unit for pi-Conjugated Polymers Enabling Electron Transport, MACROMOLECULES, 54(7), 3489-3497, 20210413
  29. Extended pi-Electron Delocalization in Quinoid-Based Conjugated Polymers Boosts Intrachain Charge Carrier Transport, CHEMISTRY OF MATERIALS, 33(21), 8183-8193, 20211109
  30. Contrasting Effect of Side-Chain Placement on Photovoltaic Performance of Binary and Ternary Blend Organic Solar Cells in Benzodithiophene-Thiazolothiazole Polymers, CHEMSUSCHEM, 14(22), 5032-5041, 20211119
  31. Pronounced Backbone Coplanarization by p-Extension in a Sterically Hindered Conjugated Polymer System Leads to Higher Photovoltaic Performance in Non-Fullerene Solar Cells, ACS APPLIED MATERIALS & INTERFACES, 13(47), 56420-56429, 20211201

Awards

  1. 2013, SPSJ Hitachi Award, Society of Polymer Science Japan, 縮環π電子系縮環π電子系を基盤とする高性能半導体ポリマーの開発

External Funds

Acceptance Results of Competitive Funds

  1. NEDO Feasibility Study Program, 2021/05, 2023/03
  2. Strategic Basic Research Programs(CREST), 2021/04/01, 2023/03/31
  3. JST-Mirai Program, 2020/11/01, 2024/03/31
  4. Strategic Basic Research Programs(ALCA), 2016/10/01, 2019/03/31
  5. KAKENHI(Grant-in-Aid for Scientific Research (B)), 2016, 2018
  6. JST-Mirai Program, 2020/11/01, 2023/03/31