SAKOMURA Masaru

Affiliation

Faculty of Engineering, Division of Materials Science and Chemical Engineering

Job Title

Lecturer

Date of Birth

1964

Research Fields, Keywords

Photoinduced Electron Transfer, Artificial Photosynthesis, Molecular Device, Organic Ultra-thin Films

Mail Address

E-mail address

Related SDGs




Education 【 display / non-display

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    1990

    Tokyo Institute of Technology   Unfinished Course

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    1988

    Tokyo Institute of Technology   Graduated

Degree 【 display / non-display

  • Doctor of Engineering - Tokyo Institute of Technology

Campus Career 【 display / non-display

  • 2007.4
     
     

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Lecturer  

  • 2001.4
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    2007.3

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Research Assistant  

  • 1991.1
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    2001.3

    Duty   Yokohama National UniversitySchool of Engineering   Research Assistant  

  • 2018.4
     
     

    Concurrently   Yokohama National UniversityGraduate school of Engineering Science   Department of Chemistry, Chemical Engineering and Life Science   Lecturer  

  • 2011.4
     
     

    Concurrently   Yokohama National UniversityCollege of Engineering Science   Department of Chemistry, Chemical Engineering and Life Science   Lecturer  

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Academic Society Affiliations 【 display / non-display

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    日本化学会

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    高分子学会

Research Areas 【 display / non-display

  • Nanotechnology/Materials / Functional solid state chemistry

  • Nanotechnology/Materials / Fundamental physical chemistry  / Physical Chemistry

 

Research Career 【 display / non-display

  • Intramolecular Electron Transfer within a Model Compound of a Photosynthetic Reaction Center

    Project Year:

  • Study on Photofunctional Organic Ultra-thin Films

    Project Year:

  • Development of High-Efficiency Organic Thin Film Solar Cells

    Project Year:

  • Devices on Molecular and DNA Levels

    Grant-in-Aid for Scientific Research  

    Project Year:

Books 【 display / non-display

  • Encyclopedia of Electrochemistry

    Masamichi Fujihira, Masaru Sakomura( Role: Joint author)

    Wiley-VCH: Weinheim 

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    Language:English Book type:Scholarly book

Thesis for a degree 【 display / non-display

  • Study of photoelectric conversion by linear amphiphilic acceptor-sensitizer-donor triads

    2002.5

    Doctoral Thesis   Single Work  

  • Photoelectric conversion by a linear A-S-D triad monolayer

    1988.2

    Master Thesis   Single Work  

Papers 【 display / non-display

  • Effect of insertion of bathocuproine buffer layer at grating-structured cathode-organic-layer interface in bulk-heterojunction solar cells

    Masaru Sakomura, Yuya Yokokura, Yusuke Takagi, Kazuyoshi Ueda

    AIP Advances   10   015144-1 - 015144-8   2020.1  [Reviewed]

    DOI

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    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

    Other Link: https://aip.scitation.org/doi/10.1063/1.5129351

  • Chemically modified indium-tin-oxide electrodes for heterojunction organic solar cells based on differenet organic donors

    Ganbaatar Tumen-Ulzii, Delgerjargal Altantsetseg, Nyamjargal Ochirkhuyag, Delgertsetseg Byambasuren … Show more authors

    Chemistry Select   2 ( 15 )   4230 - 4233   2017.5  [Reviewed]

    DOI

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley   Joint Work  

    In this study, we have examined the correlation between work function (WF) of indium-tin-oxide (ITO) and open-circuit voltage (Voc) of heterojunction photovoltaic (PV) cells based on different donor materials. Device configurations of ITO(modified)/SubPc/C60/BCP/Al and ITO(modified)/ZnPc/C60/BCP/Al were used in this study. Surface modification of ITO electrode through p-substituted benzenesulfonyl chlorides with different electron withdrawing terminal groups (C6H5-, Cl- and NO2-) has exploited to change the WF of ITO up to 5.28 eV with NO2-.Chemically modified ITOs and SubPc, ZnPc were used as anode electrode and donor materials, respectively. In order to find the correlation of Voc, two different donor materials with different HOMO levels were used in PV cells.When the SubPc was used as a donor in PV cells, the Voc was strongly dependent on WF of ITO. However, for ZnPc, the Voc was almost independent on WF of ITO due to its low HOMO level and formed ohmic contact at the interface between chemically modified ITO electrodes and ZnPc.

    Other Link: https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/slct.201700482

  • Detailed investigation of dependencies of photovoltaic performances of P3HT:PC61BM based solar cells on anodic work function modified by surface treatment of indium-tin-oxide electrode with benzenesulfonyl chloride derivatives

    Byambasuren Delgertsetseg, Namsrai Javkhlantugs, Erdenebileg Enkhtur, Yuya Yokokura, Takayuki Ooba, … Show more authors

    Organic Electronics   23   164 - 170   2015.4  [Reviewed]

    DOI Web of Science

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B. V.   Joint Work  

    The photovoltaic (PV) characteristics of bulk-heterojunction (BHJ) solar cells based on poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) were improved using indium tin oxide (ITO) anode electrodes modified chemically with CH3O-,H-,Cl-,CF3-,and NO2-terminated benzenesulfonyl chlorides as a self-assembled monolayer(SAM).The ITO electrode surfaces were easily treated through the chemical modification of the reactive -SO2Cl binding group, and the work function(WF)of the modified ITO was effectively changed depending on the permanent dipole moments introduced in the para-position of benzenesulfonyl chloride. We examined the correlation between the ITO WFs corrected by the change in the contact potential difference and the calculated dipole moments of the SAM models. Moreover, we examined the PV characteristics of the P3HT:PC61BM based BHJ organic PV cells using the SAMs or poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)-treated ITOs with different WFs lying within ±0.2 eV from the highest occupied molecular orbital(HOMO)level of P3HT. We found that the enhancement effect of the SAMs on the power-conversion efficiency(ηP)reached a maximum with Cl(ηP=3.72%),and became larger than that of PEDOT:PSS (ηP = 3.62%).Two distinct Jsc dependencies, increasing and decreasing with the increasing WF of the anode ITO,were observed at higher and lower WFs than the HOMO level of the donor, respectively.Almost constant Voc values (around0.6V)were observed with different SAM-modified ITOs,which suggested that Fermi level pinning was achieved by aligning the anode Fermi level and positive polaronic level of the donor polymer.

  • Improved performances of ITO electrodes treated by molecular-self assembly

    Byambasuren Delgertsetseg, Khayankhyarvaa Sarangerel, Namsrai Javkhlantugs, Masaru Sakomura, Kazuyo … Show more authors

    Rev.Téc.Ing.Univ.Zulia   37 ( 3 )   35 - 40   2014.12  [Reviewed]

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    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • Improvement of open-circuit voltage in organic photovoltaic cells with chemically modified indium-tin oxide

    K. Sarangerel, B. Delgertsetseg, N. Javkhalantugs, M. Sakomura, C. Ganzorig

    World Journal of Nano Science and Engineering   3   113 - 120   2013.12  [Reviewed]

    DOI

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Scientific Research   Joint Work  

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Review Papers 【 display / non-display

  • Enhanced performance in organic photovoltaic cells with chemically modified indium-tin oxide anode electrode

    B. Delgertsetseg, K. Sarangerel, A. Delgerjargal, N. Javkhlantugs, C. Ganzorig, K. Ueda, M. Sakomura

    8th International Forum on Strategic Technology   2013.6  [Reviewed]  [Invited]

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    Language:English   Publishing type:Article, review, commentary, editorial, etc. (international conference proceedings)   Joint Work  

  • 有機薄膜太陽電池の高効率化

    藤平正道、迫村 勝

    学術月報   58 ( 7 )   542 - 546   2005.7

    CiNii

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:日本学術振興会   Joint Work  

  • 図解バイオ活用技術のすべて

    藤平正道教授(東京工業大学)

    工業調査会   206 - 211,226-230   2004.6

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Joint Work  

Presentations 【 display / non-display

  • フッ素化カルボン酸による相分離LB膜表面のフォースカーブ解析

    小山 信也,迫村 勝,池田 航大

    第10回CSJ化学フェスタ2020  (リモート開催)  日本化学会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:リモート開催  

  • DFT計算によるLB膜修飾SnO2電極基板の電子特性の研究

    小宮 大樹,迫村 勝

    第10回CSJ化学フェスタ2020  (リモート開催) 

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    Event date: 2020.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:リモート開催  

  • 末端基に NH2 を有する自己組織化膜修飾電極上で のペロブスカイト膜の形成と太陽電池デバイス化の 検討

    村松 拓実,森 友萌,迫村 勝

    第9回CSJ化学フェスタ2019  (タワーホール船堀) 

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    Event date: 2019.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:タワーホール船堀  

    本研究では、ペロブスカイト層の下地として PEDOT:PSS と末端基に NH2 を有する自 己組織化単分子膜(SAM)を修飾させた電極上において、ヨウ化鉛(PbI2) とヨウ化メチル アンモニウム(MAI)をそれぞれスピンコート法を用いて成膜することでペロブスカイ ト層を形成した。電極上に異なる下地を用いたときのペロブスカイト層の表面モルフォ オロジーの変化について、原子間力顕微鏡(AFM)を用い表面測定を行い調査した。また 実際に太陽電池デバイスを作製し、性能の評価を行った。
    講演番号 P7-017
    実験・学生指導・データ解析を担当

  • 低分子系有機薄膜太陽電池におけるITO-有機層界面へのフルオロカーボン単分子膜の挿入効果

    長倉 卓也,迫村 勝

    第9回CSJ化学フェスタ2019  (タワーホール船堀) 

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    Event date: 2019.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:タワーホール船堀  

    今回の研究では、効率の向上が仕事関数増加のみの寄与によるものか、あるいは、LB膜を挿入したことによる有機電子供与体層の結晶状態の変化などにも起因するのかを確認するため、LB膜を挿入した場合とそうでない場合それぞれの試料において有機電子供与体層の表面形状を、原子間力顕微鏡を用いて観察し、比較及び検証を行った
    講演番号 P7-016
    実験・学生指導・データ解析を担当

  • ヨウ化鉛-ヨウ化メチルアンモニウム交互積層方式によるペロブスカイト層の形成と太陽電池デバイス化の検討

    鵜子 卓弥,森 友萌,迫村 勝

    第9回CSJ化学フェスタ2019  (タワーホール船堀) 

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    Event date: 2019.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:タワーホール船堀  

    本研究では、ヨウ化鉛(PbI2)とヨウ化メチルアンモニウム(MAI)を、それぞれスピンコート法を用いて成膜することでペロブスカイト層を形成した。またケルビンプローブ法を用いてペロブスカイト膜の表面電位を測定し、仕事関数を算出した
    講演番号 P1-019
    実験・学生指導・データ解析を担当

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Preferred joint research theme 【 display / non-display

  • Study on Organic Solar Cells

  • Study on Molecular Solar Cells

 

Charge of on-campus class subject 【 display / non-display

  • 2021   分子統計力学

    Graduate school of Engineering Science

  • 2021   化学熱力学B

    College of Engineering Science

  • 2021   物理化学Ⅰ

    College of Engineering Science

  • 2021   化学EP演習Ⅰ

    College of Engineering Science

 

Committee Memberships 【 display / non-display

  • 日本化学会関東支部

    2019.4 - 2021.3  代表正会員

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    Committee type:Academic society