Development of photovoltaic materials based on ferroelectric liquid crystals

• Project/Area Number: 15H03797
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Functional solid state chemistry
• Research Institution: Kagawa University
• Principal Investigator: Funahashi Masahiro 香川大学, 工学部, 教授 (90262287)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000); Fiscal Year 2017: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2015: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
• Keywords: 液晶性半導体 / 強誘電性液晶 / キャリア輸送 / 光起電力効果 / オリゴチオフェン / 自発分極 / 強誘電性 / 電荷輸送 / 異常光起電力効果 / キャリア移動度 / キラリティー / Time-of-Flight法 / モレキュラーキラリティー / 内部電界 / ホール輸送 / ナノ相分離 / オリゴシロキサン

Outline of Final Research Achievements

Bulk photovoltaic effect in the ferroelectric　liquid　crystals　was　studied.　The　photovoltaic　effect　was　proportional　to　the　spontaneous　polarization and carrier mobilities of the ferroelectric liquid crystals. The photovoltaic effect was generated by the internal electric field based on spontaneous of the bulk of the ferroelectric liquid crystal phase, unlike conventional photovoltaic effect produced at the interfacial junction. The fact that this photovoltaic effect was observed only in enatiomeric but not in racemic samples indicates that this effect is originated from molecular chirality.

Research Products

• [Journal Article] 液晶相におけるナノ相分離を利用した多重機能型光電子材料 (2018)
  • Author(s): 舟橋正浩、山岡龍太郎
  • Journal Title: 化学工業 Volume: 69 Pages: 30-36
• [Journal Article] Liquid- Crystalline Phthalocyanine Derivatives Bearing Oligosiloxane Moieties: Soft Columnar Mesophases Stabilized by Nanosegregation (2017)
  • Author(s): R. Yamaoka, M. Funahashi
  • Journal Title: ChemistrySelect Volume: 2 Issue: 36 Pages: 11934-11941
  • DOI: 10.1002/slct.201702592
  • Peer Reviewed
• [Journal Article] Anomalous photovoltaic effect based on molecular chirality: Influence of enantiomeric purity on the photocurrent response in π-conjugated ferroelectric liquid crystals (2017)
  • Author(s): A. Seki, Y. Funatsu, M. Funahashi
  • Journal Title: Phys. Chem. Chem. Phys. Volume: 19 Issue: 25 Pages: 16446-16455
  • DOI: 10.1039/c7cp02624b
  • Peer Reviewed
• [Journal Article] Integration of electro-active π-conjugated units in nanosegregated liquid-crystalline phases, (2017)
  • Author(s): Masahiro Funahashi
  • Journal Title: Polymer Journal Volume: 49 Issue: 1 Pages: 75-83
  • DOI: 10.1038/pj.2016.91
  • NAID: 40021031259
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Transport of ions and electrons in nanostructured liquid crystals (2017)
  • Author(s): Takashi Kato, Masafumi Yoshio, Takahiro Ichikawa, Bartolomeo Soberats, Hiroyuki Ohno, Masahiro Funahashi
  • Journal Title: Nature Reviews Materials Volume: 2 Issue: 4 Pages: 17001-17001
  • DOI: 10.1038/natrevmats.2017.1
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Photovoltaic Effects in Ferroelectric Liquid Crystals based on Phenylterthiophene Derivatives (2016)
  • Author(s): Atsushi Seki, Masahiro Funahashi
  • Journal Title: Chemistry Letters Volume: 45 Issue: 6 Pages: 616-618
  • DOI: 10.1246/cl.160183
  • NAID: 130005155019
  • ISSN: 0366-7022, 1348-0715
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Nanostructure formation based on the functionalized side chains in liquid-crystalline heteroaromatic compounds (2016)
  • Author(s): A. Seki, M. Funahashi
  • Journal Title: Heterocycles Volume: 92 Issue: 1 Pages: 3-30
  • DOI: 10.3987/rev-15-827
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] In-situ polymerization of liquid-crystalline thin films of electron-transporting perylene tetracarboxylic bisimide bearing cyclotetrasiloxane rings (2016)
  • Author(s): K. Takenami, S. Uemura, M. Funahashi
  • Journal Title: RSC Advances Volume: 6 Issue: 7 Pages: 5474-5584
  • DOI: 10.1039/c5ra23518a
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Liquid-crystalline perylene tetracarboxylic bisimide derivative bearing trisiloxan-2-yl moieties: Influence on mesomorphic property and electron transport (2016)
  • Author(s): M. Funahash, N. Takeuchi, A. Sonoda
  • Journal Title: RSC Advances Volume: 6 Issue: 22 Pages: 18703-18710
  • DOI: 10.1039/c5ra23119a
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Ferroelectric liquid-crystalline semiconductors based on a phenylterthiophene skeleton: Effect of introduction of oligosiloxane moieties and photovoltaic effect (2015)
  • Author(s): Y. Funatsu, A. Sonoda, M. Funahashi
  • Journal Title: Journal of Materials Chemistry C Volume: 3 Issue: 9 Pages: 1982-1993
  • DOI: 10.1039/c4tc01690d
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Circularly polarized light emission from chiral nematic phenylterthiophene dimer exhibiting ambipolar carrier transport (2015)
  • Author(s): T. Hamamoto, M. Funahashi
  • Journal Title: Journal of Materials Chemistry C Volume: 3 Issue: 26 Pages: 6891-6900
  • DOI: 10.1039/c5tc00705d
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 環状シロキサン鎖を導入した液晶性電子機能材 料の薄膜状態での重合 (2017)
  • Author(s): 舟橋正浩
  • Organizer: 第66回高分子討論会
  • Invited
• [Presentation] Coupling of electronic function with ionic transport and ferroelectricity in liquid crystalline p-conjugated systems (2017)
  • Author(s): M. Funahashi
  • Organizer: KJF-ICOMEP 2017
  • Int'l Joint Research / Invited
• [Presentation] Electronic functions of nanosegregated structures in liquid-crystalline-conjugated materials bearing cyclotetrasiloxane rings and polar moieties (2017)
  • Author(s): M. Funahashi
  • Organizer: China-Japan Joint Symposium on Functional Supramolecular Systems
  • Int'l Joint Research / Invited
• [Presentation] シクロテトラシロキサン環とイオン性部位を導入したペリレンビスイミド誘導体の液晶性と薄膜状態での重合 (2017)
  • Author(s): 舟橋正浩、上村忍
  • Organizer: 第66回高分子討論会
• [Presentation] Bulk photovoltaic effect in π-conjugated ferroelectric liquid crystals based on an oligothiophene skeleton (2017)
  • Author(s): A. Seki, M. Funahashi
  • Organizer: 16th International Conference On Ferroelectric Liquid Crystals
  • Int'l Joint Research
• [Presentation] 高次のスメクチック相における表面安定化を利用したバルク光起電力効果の特性改善 (2017)
  • Author(s): 関淳志、舟橋正浩
  • Organizer: 第２１回液晶化学研究会シンポジウム
• [Presentation] キラルな側鎖を有するフェニルクォーターチオフェン誘導体の液晶性評価 (2017)
  • Author(s): 関淳志、舟橋正浩
  • Organizer: 2017年日本液晶学会討論会・液晶交流会
• [Presentation] 重合性環状シロキサン部位を導入したπ共役強誘電性液晶のスピンコート薄膜特性 (2017)
  • Author(s): 中川順平、関淳志、舟橋正浩
  • Organizer: 2017年日本液晶学会討論会・液晶交流会
• [Presentation] 機能集積型液晶性半導体の開発: π共役強誘電性液晶の分子不斉に由来したバルク光起電力効果 (2017)
  • Author(s): 関淳志、舟橋正浩
  • Organizer: 第66回高分子討論会
• [Presentation] 重合性環状シロキサン部位導入したπ共役強誘電性液晶のスピンコート薄膜特性 (2017)
  • Author(s): 中川順平、関淳志、舟橋正浩
  • Organizer: 第２１回液晶化学研究会シンポジウム
• [Presentation] オリゴシロキサン部位を有するフタロシアニン誘導体の凝集構造がキャリア輸送特性へ及ぼす影響 (2017)
  • Author(s): 山岡龍太郎、舟橋正浩
  • Organizer: 日本化学会第98春季年会
• [Presentation] Bulk photovoltaic effect in π-conjugated ferroelectric liquid crystals (2017)
  • Author(s): Atsushi Seki, Masahiro Funahashi
  • Organizer: the third Asian Conference on Liquid Crystals (ACLC 2017)
  • Place of Presentation: National Cheng Kung University, Taiwan
  • Int'l Joint Research
• [Presentation] Soft matter electronics based on nanosegregated π-conjugated liquid crystals (2016)
  • Author(s): M. Funahashi
  • Organizer: Matcon 2016 (International Conference on Materials for Millennium
  • Place of Presentation: Kochi, India
  • Year and Date: 2016-01-14
  • Int'l Joint Research / Invited
• [Presentation] Redox-active liquid-crystalline polymer thin films with nanosegregated structures based on perylene bisimide bearing cyclotetrasiloxane rings (2016)
  • Author(s): Masahiro Funahashi
  • Organizer: International Meeting on Information Displays (IMID) 2016
  • Place of Presentation: ICC, Jeju, Korea
  • Int'l Joint Research / Invited
• [Presentation] 結晶的な構造と液体的な構造をナノメータースケールで集積する-ナノ相分離型液晶性電子機能材料- (2016)
  • Author(s): 舟橋正浩
  • Organizer: 第25回有機結晶シンポジウム
  • Place of Presentation: 京都大学、京都市
  • Int'l Joint Research
• [Presentation] Anomalous photovoltaic effect in ferroelectric liquid crystals based on phenylterthiophene unit (2016)
  • Author(s): Atsushi Seki, Masahiro Funahashi
  • Organizer: International Liquid Crystal Conference 2016
  • Place of Presentation: Kent State University, Kent, Ohio
  • Int'l Joint Research
• [Presentation] π共役系強誘電性液晶における異常光起電力効果 / Anomalous Photovoltaic Effect in π-conjugated Ferroelectric Liquid Crystals (2016)
  • Author(s): 関淳志、舟橋正浩
  • Organizer: 第26回日本MRS年次大会
  • Place of Presentation: 産業貿易センタービル、横浜市
  • Int'l Joint Research
• [Presentation] Functionalization of polymerizable liquid crystalline semiconductors based on nanosegregation (2015)
  • Author(s): M. Funahashi
  • Organizer: Pacifichem 2015
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2015-12-15
  • Int'l Joint Research / Invited
• [Presentation] ナノ相分離型液晶性電子機能材料の高分子化と電子・電気化学機能 (2015)
  • Author(s): 舟橋正浩
  • Organizer: 高分子学会東海支部講演会
  • Place of Presentation: 名古屋
  • Year and Date: 2015-12-05
  • Invited
• [Presentation] Electronic functions of liquid-crystalline dyes bearing cyclic organosiloxane moieties (2015)
  • Author(s): M. Funahashi
  • Organizer: The 7th East Asia Symposium on Functional Dyes and Advanced Materials (EAS-7)
  • Place of Presentation: Sakai, Japan
  • Year and Date: 2015-09-02
  • Int'l Joint Research / Invited
• [Presentation] In situ polymerization of liquid crystalline semiconductors bearing cyclotetrasiloxane rings (2015)
  • Author(s): M. Funahashi
  • Organizer: International Meeting on Information Displays 2015
  • Place of Presentation: Daegu, Korea
  • Year and Date: 2015-08-18
  • Int'l Joint Research / Invited
• [Presentation] 環状シロキサン部位を有する液晶性半導体の重合薄膜の作製と電子機能 (2015)
  • Author(s): 舟橋正浩
  • Organizer: 高分子学会東海支部講演会
  • Place of Presentation: 岐阜
  • Year and Date: 2015-08-07
  • Invited
• [Book] 「Time-of-Flight法によるキャリア移動度の測定」 日本液晶学会編「液晶科学実験講座－基礎と計測－」、第14章 (2017)
  • Author(s): 舟橋正浩（分担）
  • Total Pages: 205
  • Publisher: 国際文献社
  • ISBN: 9784902590753
• [Book] 自己組織化マテリアルのフロンティア (2015)
  • Author(s): 舟橋正浩（分担執筆）
  • Total Pages: 300
  • Publisher: フロンティア出版
• [Remarks] 舟橋研究室トップページ
  • URL: http://www.eng.kagawa-u.ac.jp/~m-funa/Funahashi_2010_Top.html
• [Remarks] 舟橋研究室研究内容
  • URL: http://www.eng.kagawa-u.ac.jp/~m-funa/Funahashi_2010_Research.html
• [Remarks] 舟橋研究室研究業績
  • URL: http://www.eng.kagawa-u.ac.jp/~m-funa/Funahashi_2010_publication.html