Itaru Osaka

Summary

Affiliation: Hiroshima University
Country: Japan

Publications

  1. ncbi request reprint Synthesis, characterization, and transistor and solar cell applications of a naphthobisthiadiazole-based semiconducting polymer
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    J Am Chem Soc 134:3498-507. 2012
  2. doi request reprint Drastic change of molecular orientation in a thiazolothiazole copolymer by molecular-weight control and blending with PC61BM leads to high efficiencies in solar cells
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan Precursory Research for Embryonic Science and Technology PRESTO, Japan Science and Technology Agency, Chiyoda ku 102 0075, Japan
    Adv Mater 24:425-30. 2012
  3. doi request reprint High-mobility semiconducting naphthodithiophene copolymers
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    J Am Chem Soc 132:5000-1. 2010
  4. ncbi request reprint Impact of isomeric structures on transistor performances in naphthodithiophene semiconducting polymers
    Itaru Osaka
    Department of Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    J Am Chem Soc 133:6852-60. 2011
  5. doi request reprint Thienoacene-based organic semiconductors
    Kazuo Takimiya
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima, Japan
    Adv Mater 23:4347-70. 2011
  6. doi request reprint Linear- and angular-shaped naphthodithiophenes: selective synthesis, properties, and application to organic field-effect transistors
    Shoji Shinamura
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    J Am Chem Soc 133:5024-35. 2011
  7. doi request reprint Thiophene-thiazolothiazole copolymers: significant impact of side chain composition on backbone orientation and solar cell performances
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima, 739 8527, Japan Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Chiyoda ku, 102 0075, Japan Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science CEMS Wako, Saitama, 351 0198, Japan
    Adv Mater 26:331-8. 2014
  8. doi request reprint Borylation on Benzo[1,2-b:4,5-b']- and Naphtho[1,2-b:5,6-b']dichalcogenophenes: Different Chalcogene Atom Effects on Borylation Reaction Depending on Fused Ring Structure
    Masahiro Nakano
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan, and Emergent Molecular Function Research Team, RIKEN Advanced Science Institute, Wako, Saitama 351 0198, Japan
    Org Lett 14:5448-51. 2012
  9. doi request reprint Diphenyl derivatives of dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene: organic semiconductors for thermally stable thin-film transistors
    Myeong Jin Kang
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima, Hiroshima 739 8527 Japan
    ACS Appl Mater Interfaces 5:2331-6. 2013
  10. ncbi request reprint Orthogonally functionalized naphthodithiophenes: selective protection and borylation
    Shoji Shinamura
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    Org Lett 14:4718-21. 2012

Collaborators

  • Kazuo Takimiya
  • Eigo Miyazaki
  • Shoji Shinamura
  • Kazuki Niimi
  • Masahiro Nakano
  • Myeong Jin Kang
  • Tomoya Kashiki
  • Masahiko Saito
  • Kazuaki Kawashima
  • Akiko Nakao
  • Tatsuya Yamamoto
  • Ryusuke Sugimoto
  • Hideo Ohkita
  • Satoru Ikeda
  • Takashi Okabe
  • Yasuhito Suzuki
  • Tsuyoshi Asano
  • Yasunari Tamai
  • Noriko Takemura
  • Takeshi Nishimura
  • Naoyuki Yanai
  • Chihaya Adachi
  • Yoshinobu Houchin
  • Hiroki Mori
  • Hayato Kakizoe
  • Takamichi Mori
  • Jun Takeya
  • Masakazu Yamagishi
  • Masahiro Kohara

Detail Information

Publications21

  1. ncbi request reprint Synthesis, characterization, and transistor and solar cell applications of a naphthobisthiadiazole-based semiconducting polymer
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    J Am Chem Soc 134:3498-507. 2012
    ..These results demonstrate great promise for using NTz as a bulding unit for high-performance semiconducting polymers for both transistors and solar cells...
  2. doi request reprint Drastic change of molecular orientation in a thiazolothiazole copolymer by molecular-weight control and blending with PC61BM leads to high efficiencies in solar cells
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan Precursory Research for Embryonic Science and Technology PRESTO, Japan Science and Technology Agency, Chiyoda ku 102 0075, Japan
    Adv Mater 24:425-30. 2012
    ..These results might give new insight into the structure-property relationships in BHJ solar cells...
  3. doi request reprint High-mobility semiconducting naphthodithiophene copolymers
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    J Am Chem Soc 132:5000-1. 2010
    ..We believe that these findings will give new insight into the design of new organic semiconducting materials and that the present polymers are promising materials for printable electronics...
  4. ncbi request reprint Impact of isomeric structures on transistor performances in naphthodithiophene semiconducting polymers
    Itaru Osaka
    Department of Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    J Am Chem Soc 133:6852-60. 2011
    ..We thus propose that both the molecular shapes and the electronic structures are important factors to be considered when designing high performance semiconducting polymers...
  5. doi request reprint Thienoacene-based organic semiconductors
    Kazuo Takimiya
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima, Japan
    Adv Mater 23:4347-70. 2011
    ..The discussion provides insight into new molecular design strategies for the development of superior organic semiconductors...
  6. doi request reprint Linear- and angular-shaped naphthodithiophenes: selective synthesis, properties, and application to organic field-effect transistors
    Shoji Shinamura
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    J Am Chem Soc 133:5024-35. 2011
    ..These results indicate that the present NDT cores, in particular the linear-shaped, centrosymmetric naphtho[2,3-b:6,7-b']dithiophene, are promising building blocks for the development of organic semiconducting materials...
  7. doi request reprint Thiophene-thiazolothiazole copolymers: significant impact of side chain composition on backbone orientation and solar cell performances
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima, 739 8527, Japan Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Chiyoda ku, 102 0075, Japan Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science CEMS Wako, Saitama, 351 0198, Japan
    Adv Mater 26:331-8. 2014
    ..We highlight that the orientation significantly impact their solar cell efficiency in particular when using thicker active layers. ..
  8. doi request reprint Borylation on Benzo[1,2-b:4,5-b']- and Naphtho[1,2-b:5,6-b']dichalcogenophenes: Different Chalcogene Atom Effects on Borylation Reaction Depending on Fused Ring Structure
    Masahiro Nakano
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan, and Emergent Molecular Function Research Team, RIKEN Advanced Science Institute, Wako, Saitama 351 0198, Japan
    Org Lett 14:5448-51. 2012
    ..e., benzo[1,2-b:4,5-b']- and naphtho[1,2-b:5,6-b']dichalcogenophenes, were examined, and it was observed that the reaction efficiency largely depends on the fused ring structure and chalcogenophene ring...
  9. doi request reprint Diphenyl derivatives of dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene: organic semiconductors for thermally stable thin-film transistors
    Myeong Jin Kang
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima, Hiroshima 739 8527 Japan
    ACS Appl Mater Interfaces 5:2331-6. 2013
    ..For its excellent thermal stability with good FET characteristics, 2,9-DPh-DNTT can be a useful organic semiconductor in various applications that require processes at high temperatures...
  10. ncbi request reprint Orthogonally functionalized naphthodithiophenes: selective protection and borylation
    Shoji Shinamura
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    Org Lett 14:4718-21. 2012
    ..The same protocol is applicable to other isomeric naphthodithiophenes (NDTs), which affords a set of key building blocks for the development of elaborated functional π-materials...
  11. ncbi request reprint Isomerically pure anthra[2,3-b:6,7-b']-difuran (anti-ADF), -dithiophene (anti-ADT), and -diselenophene (anti-ADS): selective synthesis, electronic structures, and application to organic field-effect transistors
    Masahiro Nakano
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    J Org Chem 77:8099-111. 2012
    ..We also tested the diphenyl derivatives of anti-ADF, -ADT, and -ADS as the active material for OFET devices, which showed high mobility of up to 1.3 cm(2) V(-1) s(-1)...
  12. ncbi request reprint [2,2']Bi[naphtho[2,3-b]furanyl]: a versatile organic semiconductor with a furan-furan junction
    Kazuki Niimi
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    Chem Commun (Camb) 48:5892-4. 2012
    ..In the devices, the material acted as a p-type semiconductor, showing moderately high mobility in OFETs, good photo conversion efficiency in OPVs, and blue-green emission in OLETs...
  13. doi request reprint Naphthodithiophene-naphthobisthiadiazole copolymers for solar cells: alkylation drives the polymer backbone flat and promotes efficiency
    Itaru Osaka
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    J Am Chem Soc 135:8834-7. 2013
    ..As a result, the present polymers exhibit high power conversion efficiencies of up to ~8.2% in conventional single-junction solar cells...
  14. ncbi request reprint Angular-shaped naphthodifurans, naphtho[1,2-b;5,6-b']- and naphtho[2,1-b;6,5-b']-difuran: are they isoelectronic with chrysene?
    Masahiro Nakano
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    Chem Commun (Camb) 48:5671-3. 2012
    ..The difference in electronic structure in the ground state can be explained by distinct electronic perturbation from the outermost aromatic rings...
  15. ncbi request reprint General synthesis of dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DNTT) derivatives
    Kazuki Niimi
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527 Japan
    Org Lett 13:3430-3. 2011
    ..Thus, newly developed derivatives of DNTT showed very high field effect mobility in the vapor-processed field-effect transistors up to 8 cm(2) V(-1) s(-1)...
  16. ncbi request reprint Dianthra[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DATT): synthesis, characterization, and FET characteristics of new π-extended heteroarene with eight fused aromatic rings
    Kazuki Niimi
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    J Am Chem Soc 133:8732-9. 2011
    ....
  17. doi request reprint Highly Efficient and Stable Solar Cells Based on Thiazolothiazole and Naphthobisthiadiazole Copolymers
    Masahiko Saito
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima, 739 8527, Japan
    Sci Rep 5:14202. 2015
    ..These results indicate that the newly developed polymers are promising materials for PSCs in the practical use. ..
  18. ncbi request reprint Largely π-extended thienoacenes with internal thieno[3,2-b]thiophene substructures: synthesis, characterization, and organic field-effect transistor applications
    Tatsuya Yamamoto
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    Org Lett 14:4914-7. 2012
    ....
  19. ncbi request reprint Synthesis and characterization of benzo[1,2-b:3,4-b':5,6-b'']trithiophene (BTT) oligomers
    Tomoya Kashiki
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima 739 8527, Japan
    J Org Chem 76:4061-70. 2011
    ....
  20. doi request reprint High-efficiency polymer solar cells with small photon energy loss
    Kazuaki Kawashima
    Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1 4 1 Kagamiyama, Higashi Hiroshima, Hiroshima 739 8527, Japan
    Nat Commun 6:10085. 2015
    ....
  21. doi request reprint Naphthodithiophenes: emerging building blocks for organic electronics
    Kazuo Takimiya
    Emergent Molecular Function Research Group, RIKEN Center for Emergent Matter Science CEMS, Wako, Saitama, 351 0198, Japan Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi Hiroshima, 739 8527, Japan
    Chem Rec 15:175-88. 2015
    ..Here, we provide an overview of recent synthetic evolutions in NDT chemistry and progress in NDT-based materials, especially conjugated oligomers and polymers and their applications to OFETs and OPVs. ..