Control of electronic states of pi-conjugated polymers by introducing Si- or Ge-bridges and applications to organic solar cells

• Project/Area Number: 26288094
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Organic and hybrid materials
• Research Institution: Hiroshima University
• Principal Investigator: Ohshita Joji 広島大学, 工学(系)研究科(研究院), 教授 (90201376)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2016: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2015: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2014: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
• Keywords: 有機半導体材料 / 有機太陽電池

Outline of Final Research Achievements

In this work, we synthesized well-designed π-conjugated polymers and oligomers containing Si- or Ge-bridged biaryl units in the backbone and explored their properties and electronic states. They were demonstrated to have enhanced conjugation as compared with the non-bridged congeners. These polymers and oligomers exhibited functionalities as photo-electron conversion materials. These results provide new concept of molecular design of functional materials based on the Si and Ge-bridged conjugated systems.

Research Products

• [Journal Article] Dithienogermole-containing D-π-A-π-A Photosensitizers for Dye-sensitized Solar Cells (2017)
  • Author(s): Y. Adachi, Y. Ooyama, N. Shibayama, J. Ohshita
  • Journal Title: Chem. Lett. Volume: 46 Issue: 3 Pages: 310-312
  • DOI: 10.1246/cl.161034
  • NAID: 130005436569
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Disilanobithiophene-dithienylbenzothiadiazole alternating polymer as 2 donor material of bulk heterojunction polymer solar cells (2016)
  • Author(s): M. Nakashima, N. Murata, Y. Suenaga, H. Naito, T. Sasaki, K. Kunugi, J. Ohshita
  • Journal Title: Synthetic Metals Volume: 215 Pages: 116-120
  • DOI: 10.1016/j.synthmet.2016.02.012
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Synthesis of a conjugated D-A polymer with bi(disilanobithiophene) as a new donor component (2016)
  • Author(s): M. Nakashima, Y. Ooyama, T. Sugiyama, H. Naito, J. Ohshita
  • Journal Title: Molecules Volume: 21 Issue: 6 Pages: 789-789
  • DOI: 10.3390/molecules21060789
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Synthesis of organic photosensitizers containing dithienogermole and thiadiazolo[3,4-c]pyridine units for dye-sensitized solar cells (2016)
  • Author(s): Y. Adachi, Y. Ooyama, N. Shibayama, J. Ohshita
  • Journal Title: Dalton Trans. Volume: 45 Issue: 35 Pages: 13817-13826
  • DOI: 10.1039/c6dt02469f
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Group 14 metalloles condensed with heteroaromatic systems (2016)
  • Author(s): J. Ohshita
  • Journal Title: Org. Photonics Photovolt. Volume: 4 Issue: 1 Pages: 52-59
  • DOI: 10.1515/oph-2016-0006
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Synthesis, Properties, and Polymerization of Spiro [(dipyridinogermole)(dithienogermole)] (2016)
  • Author(s): Murakami, K. Ooyama, Y. Higashimura, H. Ohshita, J.
  • Journal Title: Organometallics Volume: 35 Issue: 1 Pages: 20-26
  • DOI: 10.1021/acs.organomet.5b00817
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Disilanobithiophene-dithienylbenzothiadiazole Alternating Polymer as Donor Material of Bulk Heterojunction Polymer Solar Cells (2016)
  • Author(s): Nakashima, M. Murata, N. Suenaga, Y. Naito, H. Sasaki, T. Kunugi, Y. Ohshita, J.
  • Journal Title: Synthetic Metals Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Synthesis of new D-A polymers containing disilanobithiophene donor and application to bulk heterojunction polymer solar cells (2015)
  • Author(s): M. Nakashima, T. Otsura, H. Naito, and J. Ohshita
  • Journal Title: Polymer Journal Volume: 47 Issue: 11 Pages: 733-738
  • DOI: 10.1038/pj.2015.61
  • NAID: 40020633228
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Synthesis of Conjugated D-A Polymers Bearing Bi(dithienogermole) as a New Donor Component and Their Applications to Polymer Solar Cells and Transistors (2015)
  • Author(s): J. OHSHITA, M. MIYAZAKI, M. NAKASHIMA, D. TANAKA, Y. OOYAMA, T. SASAKI, Y. KUNUGI, Y. MORIHARA
  • Journal Title: RSC Advances Volume: 5 Issue: 17 Pages: 12686-12691
  • DOI: 10.1039/c4ra16749j
  • Peer Reviewed
• [Journal Article] Synthesis of D-A Polymers with Disilanobithiophene Donor and Pyridine or Pyrazine Acceptor and Their Applications to Dye-Sensitized Solar Cells (2015)
  • Author(s): Ohshita, J.; Adachi, Y.; Tanaka D.; Nakashima, M.; Ooyama, Y.
  • Journal Title: RSC Advances Volume: 5 Issue: 46 Pages: 36637-36679
  • DOI: 10.1039/c5ra01055a
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] ジチエノゲルモールを含むD-π-A-π-A型有機色素のDSSC特性 (2016)
  • Author(s): 安達洋平、大山陽介、 大下浄治
  • Organizer: 第20回ケイ素化学協会シンポジウム
  • Place of Presentation: 広島
  • Year and Date: 2016-10-07
• [Presentation] Synthesis of D-π-A-π-A type organic photosensitizers containing dithienogermole unit for dye-sensitized solar cells (2016)
  • Author(s): Yohei Adachi, Yousuke Ooyama, Joji Ohshita
  • Organizer: 2016ICFPE
  • Place of Presentation: Yamagata
  • Year and Date: 2016-09-06
  • Int'l Joint Research
• [Presentation] 14族元素架橋ビピリジルを核とした新規π共役材料の探索 (2015)
  • Author(s): 村上和也，大下浄治，大山陽介
  • Organizer: 2015年日本化学会中国四国支部大会
  • Place of Presentation: 岡山
  • Year and Date: 2015-11-14
• [Presentation] J. Synthesis of new dithienogermoles (2015)
  • Author(s): Nakamura, M. Ooyama, Y. Ohshita, J.
  • Organizer: IKCOC-13
  • Place of Presentation: Kyoto
  • Year and Date: 2015-11-09
  • Int'l Joint Research
• [Presentation] ジシラノビチオフェンをドナーとする新規D-A型ポリマーの合成及び物性 (2015)
  • Author(s): 中島真実，大面隆範，内藤裕義，大下浄治
  • Organizer: 第34回無機高分子研究討論会
  • Place of Presentation: 東京
  • Year and Date: 2015-11-05
• [Presentation] Synthesis of Si-and Ge-Bridged Bithiophene and Bipyridyl (2015)
  • Author(s): Ohshita, J. Murakami, K. Nakashima, M.
  • Organizer: The 5th Asian Silicon Symposium
  • Place of Presentation: Jeju, Korea
  • Year and Date: 2015-10-18
  • Int'l Joint Research / Invited
• [Presentation] ジシラン架橋ビチオフェン構造をドナーに有するD-A型ポリマーの合成及び応用 (2014)
  • Author(s): 中島真実，大下浄治，田中大樹
  • Organizer: 第6回薄膜太陽電池セミナー
  • Place of Presentation: 広島
  • Year and Date: 2014-10-15 – 2014-10-16
• [Presentation] ジシラン架橋部位を有する新規ポリマーの合成と色素増感太陽電池への応用 (2014)
  • Author(s): 10.安達洋平，大下浄治，大山陽介，播磨 裕
  • Organizer: 第6回薄膜太陽電池セミナー
  • Place of Presentation: 広島
  • Year and Date: 2014-10-15 – 2014-10-16
• [Presentation] ジシラン架橋ビチオフェン骨格を有するポリマーの合成と色素増感太陽電池への応用 (2014)
  • Author(s): 安達洋平，大下浄治，大山陽介，播磨 裕
  • Organizer: 第63回高分子討論会
  • Place of Presentation: 長崎
  • Year and Date: 2014-09-24 – 2014-09-26
• [Presentation] ynthesis and Properties of D-A Type Polymers Containing Disilane-Bridged Bithiophene as The Donor Unit (2014)
  • Author(s): Nakashima, M.; Ohshita, J.; Fueno, H.; Tanaka, K.
  • Organizer: The 17th International Symposium on Silicon Chemistry
  • Place of Presentation: ベルリン（ドイツ）
  • Year and Date: 2014-08-03 – 2014-08-08
• [Book] Ge and Sn in Conjugated Organic Materials in "Main Group Strategies towards Functional Organic Materials" (ed. F. Jaekle, T. Baumgarter) (2017)
  • Author(s): Y. Adachi, J. Ohshita
  • Total Pages: 30
  • Publisher: John Wiley & Sons Ltd.
• [Remarks] 広島大学大学院工学研究科応用化学専攻有機材料化学研究室
  • URL: http://home.hiroshima-u.ac.jp/orgmtrls/Ohshita_Group/Ohshita_Group-Home.html
• [Remarks] 有機材料化学研究室
  • URL: http://home.hiroshima-u.ac.jp/orgmtrls/Ohshita_Group/Ohshita_Group-Home.html
• [Remarks] 広島大学有機材料化学研究室
  • URL: http://home.hiroshima-u.ac.jp/orgmtrls/Ohshita_Group/Ohshita_Group-Home.html