Department of Materials Science,
Shimane University
Hiromitsu & Mizuno Laboratory




Welcome to our Home Page!

Keywords:
O
rganic Solar Cells, Phthalocyanine, Thiophene/Phenylene Co-Oligomer, Energy Transfer, ZnO, Organic Dye J-aggregates, Cavity Polariton, Light Amplification

We have studied the physics of organic materials.
Our current subjects are as follows:

  1. Study of the working mechanism of organic solar cells and the development of new organic solar cells.
    (Organic solar cells using metal phthalocyanines, Organometal halide perovskite solar cells, Non-fullerene organic photovoltaics using a thiophene/phenylene co-oligomer as a donor material, P3HT/PCBM nanoparticle-based organic photovoltaics)
  2. Development of new light-emitter based on fluorescnence resonance energy transfer (Energy transfer between ZnO nanoparticels and organic molecules, Energy transfer in thin films of conductive polymer/porphyrin)
  3. Optical properties of metal mirror microcavities containing organic semiconductors
    ËWe have investigated the optical properties of the cavity polaritons to realize laser devices using the organic functional materials.
    In previous studies, much effort has been devoted to investigating the optical properties of cavity polaritons in organic dye J-aggregates embedded in a polymer film. We aim to realize a control of an exciton-photon interaction by controlling the molecular-assembly structures.
  4. Light amplification properties of organic materials
    ËWe have investigated the light amplification properties using an energy transfer in thin films composed of organic or inorganic/organic hybrid materials.
  5. Biosensors using GaN ring microcavities (with Prof. Hsu, Shin-Chieh (Roy Hsu) @Tamkang University)
  6. Study of the magnetism of molecular crystals



For more details, please read the RESEARCH.




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Figure 1. Organic solar cells are driving a small propeller.
(Put your mouse pointer on the photo.)



Recent topics


April 2018
œ The new term started. (Master's students:3, Bachelor's Students:6)

March 2018
œ Our paper about excitation energy transfer between conjugated polymer and porphyrin has been published on Thin Solid Films.
(https://www.sciencedirect.com/science/article/pii/S0040609018301457)
œ Our paper about organic photovoltaic cells using onion-like carbon (OLC) has been published on Thin Solid Films. (https://www.sciencedirect.com/science/article/pii/S0040609018302244)
œ
Since we got a request from PTA in Tsuda elementary school, we held a science experiment classroom entitled [Designing a Germanium Radio].
The lecturer: Prof. Kaoru Mizuno, Prof. Yasuji Yamada, Assoc. Prof. Sinya Tsukada, Assist. Prof. Kokoro Kitamura, Assist. Prof. Hitoshi Mizuno. Assoc. Prof. Mitsutaka Miyamoto and Assist. Prof. Shuhei Funaki also acted as an organizing committee member.

œ Dr. Mizuno conducted research presentations in The 65th JSAP Spring Meeting 2018 which was held at Waseda University on March 17-20.
[ Fabrication and Optical Properties of Microcavities Containing Composite Thin Films of Inorganic Nanosheets and Dye Molecules ]
[ Characterization of Small-Molecule Photovoltaic Cells with Onion-Like Carbon as a Hole Collection Layer ]


February 2018
œ Thesis presentations were conducted by undergraduate and graduate students.
œ Joint presentation session between students and companies was held at Shimane University on February 23. Mr. Hirano and Mr. Nakamura conducted a research presentation entitled [Study of Organic Solar Cells Contributing to a Low-Carbon Society].


December 2017
œ Dr. Mizuno conducted a research presentation in 5th Nano Today Conference which was held at Waikoloa Beach Marriott in Hawaii on December 6-10.
[ Photovoltaic Properties of Inverted-Type Hybrid Solar Cells Using a Soluble Zinc Phthalocyanine ]
œ We had our research progress meeting on December 21. There was a drinking party after the meeting.

November 2017
œ Dr. Mizuno conducted an invited presentation in 18th International Union of Materials Research Societies-International Conference in Asia (IUMRS-ICA 2017) which was held in Taiwan on November 5-9. Dr. Mizuno acted as chairman in this conference.

[ Influence of Onion-Like Carbon Layers on the Photovoltaic Properties in Zinc Phthalocyanine-Based Solar Cells ]
œ Our laboratory members conducted research presentations in Shimane University-Shinshu University joint seminar which was held at Shimane University on November 29.
Hitoshi Mizuno [Optical Properties of Microcavities Containing Blend Films of MEH-PPV and H2TPP(COOH) ]
Nayuta Hirano [Photovoltaic Characteristics of Inverted Semi-Transparent Polymer Solar Cells]
Shota Nakamura [Inverted Type Lead Halide Perovskite Solar Cells Using Organic-Solvent-Dispersed PEDOT as a Hole Transport Layer]
Takemasa Tsutsui [Fabrication of ZnPc-TB:PCBM Bulk Heterojunction Solar Cells Using a Solution Process]
Ayaka Sakurai [Non]Fullerene Based Organic Solar Cells Using BP2T as a Donor Material]


September 2017
œ Dr. Mizuno participated in The 78th JSAP Autumn Meeting 2017 which was held at Fukuoka Convention Center on September 5-8.


August 2017
œ Open Campus was held at Shimane University on August 5. Dr. Mizuno performed experiments on dye-sensitized solar cells.

July 2017
œ Dr. Mizuno visited University of Southern Denmark to have a discussion toward a research collaboration. (http://findresearcher.sdu.dk:8080/portal/en/person/madsen)
œ
To develop Mr. Hirano's research on solution-processed polymer solar cells, we had the discussion for our future work.
œ Mr. Higuchi conducted oral presentation in Nanotechnology Project Center-Open Seminar which was held at Shimane University on July 20.
[Characterization of Inverted-Type Organic Photovoltaics Using P3HT/PCBM Nanoparticles]

œWe participated in The JSAP Chugoku-Shikoku Branch Meeting 2017 which was held at Ehime University on July 29 (Mizuno, Nasu). Mr. Nasu conducted oral presentation in this meeting.
[Optical Properties of Microcavities with an Active Layer of Conductive Polymer:Porphyrin Blend Film]

May 2017
œ We conducted research presentations in The 15th Annual Meeting of Society of Nano Science and Technology which was held at Hokkaido Citizens Activities Center [Kaderu 2.7] on May 10-12. (Mizuno, Higuchi, Nakamura, Tsutsui)
œ We participated in The 5th Education and Research Workshop of Electronic Devices, Circuits, Illuminations, and Systems which was held at Hiroshima Institute of Technology on May 27. (Mizuno, Nasu)

April 2017
œ The new term started. (Master's Students: 4, Bachelor's Students: 7)

March 2017
œ A graduation ceremony was held for undergraduate and graduate students.
œ Dr. Mizuno stayed at University of Cagliari for a month as a visiting professor.
œ Mr. Hirano departed to University of Southern Denmark for study abroad. He will perform a research on organic photovoltaic cells.

February 2017
œ Thesis presentations were conducted by undergraduate and graduate students.

December 2016
œ Mr. Hirano will go to Denmark for study abroad using an international training program for our students entitled "Japan Public-Private Partnership Student Study Abroad Program -TOBITATE! Young Ambassador Program-". Congratulations on your study abroad!
œDr. Mizuno conducted a research presentation in The 8th Asian Conference on Organic Electronics (A-COE 2016) which was held at Kyoto University on December 6.
[ Heterojunction Photovoltaic Cells Consisting of 5,5'-Di(4-biphenylyl)-2,2'-bithiophene
and 3,4,9,10-perylenetetracarboxylic bis-benzimidazole ]

œ We had our research progress meeting on December 19.
œ Dr. Mizuno conducted an invited presentation in Global Research Efforts on Energy and Nanomaterials (GREEN 2016) which was held in Taiwan on Decembert 22-25. Dr. Mizuno is one of the young committee member of Asia Pacific Society for Materials Research.
[ Photoconversion Properties of Thin Film Photovoltaics Using a Soluble Zinc Phthalocyanine ]

November 2016
œ The 10th Workshop for Refreshing Science in the Classroom was held at Shimane University on November 27. Dr. Mizuno was assigned the experiments on "Light scattering by a water-based wax" and "Basic electric motor".


October 2016
œ Dr. Mizuno gave a research presentation in Japan and China International Seminar which was held at Shimane University on October 16. (consecutive interpretation in Chinese)
[ Photoconversion Properties of Zinc Phthalocyanine-Based Thin Film Photovoltaics ]


July - September 2016
œ Our laboratory member participated in The 10th Research Association for Organic Devices for graduate students. (Higuchi, Nasu, Tsutsui)
Ë Mr. Higuchi conducted a research presenation about coating-type organic thin film solar cells.
œ Dr. Mizuno went to Waikato Institute of Technology (Wintec) which is located in New Zealand using a Staff Training Program in Shimane University. (July 30 - September 30)
œ Dr. Mizuno conducted a research presentation entitled "Characterization of Zinc Phthalocyanine-Based Thin Film Photovoltaics" at Wintec on September 13.
œ Dr. Mizuno gave a lecture on "Friction" at Wintec on September 15.

June 2016

œ Dr. Mizuno conducted research presentations in The 14th Annual Meeting of Society of Nano Science and Technology which was held at Kitakyushu International Conference Center on June 14-16.
[ Characterization of Organic Thin-Film Solar Cells Using Zinc Phthalocyanine ]
[ Characterization of CH3NH3PbI3 Solar Cells ]
œOur laboratory member acted as a local committee member in 2016 Joint RCBJSF-IWRF Conference (13th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity (RCBJSF) and International Workshop on Relaxor Ferroelectrics 2016 (IWRF)) which was held at Kunibiki Messe (Matsue CIty) on June 19-23. (Mizuno, Higuchi)

May 2016
œ New bachelor student belongs to our laboratory. He is going to conduct a research on organic thin film solar cells.


April 2016
œ Mr. Higuchi returned from study abroad in Australia. Welcome back!!
œ The new term started.
(Master's Students: 2, Bachelor's Students: 6)

March 2016
œWe conducted research presentations in The 63rd JSAP Spring Meeting 2016 which was held at Tokyo Institute of Technology on March 19-22.

œA graduation ceremony was held for undergraduate and graduate students.


February 2016
œ Thesis presentations were conducted by undergraduate and graduate students.

January 2016
œOur paper about optical properties of metal mirror microcavity containing dye J-aggregates has been published on Materials Letters.


December 2015
œDr. Mizuno conducted a presentation in Pacifichem 2015 which was held in Hawaii Convention Center on December 15-20.
œWe had our research progress meeting with Nishigori laboratory.

November 2015
œDr. Mizuno gave a lecture at a seminar for undergraduate students. Moreover, the presentation on characteristics of the lasing and cavity polaritons in the organic materials was conducted.
œThe 9th Workshop for Refreshing Science in the Classroom was held at Shimane University. Dr. Mizuno was assigned the experiments on inorganic electroluminescence (EL).


October 2015

œDr. Mizuno gave an invited talk in "Green Photonics Workshop on Exciton-Polariton and Their Laser Applications" at Nara Institute of Science and Technology on October 21.
œThe second Ryo's Laboratory Open Seminar 2015 was held at Shimane University on October 30. Our laboratory members conducted presentations.


September 2015
œDr. Mizuno conducted research presentations in The 76th JSAP Autumn Meeting 2015 which was held at Nagoya Congress Center on September 13-16.

August 2015
œDr. Mizuno participated in The JSAP Chugoku-Shikoku Branch Meeting 2015 which was held at Tokushima University on August 1.

œOpen Campus was held at Shimane University on August 8. Dr. Mizuno performed experiments on dye-sensitized solar cells.

œDr. Mizuno conducted a Keynote Presentation in 2015 International Symposium for Advanced Materials Research (ISAMR2015) which was held in Taiwan on August 16-20. Dr. Mizuno is one of the young committee member of Asia Pacific Society for Materials Research.
(http://www.apsmr.org/isamr-2015/)

June 2015
œMr. Higashikage participated in The 10th Research Association for Organic Devices for graduate students.

May 2015
œDr. Mizuno participated in Forum on Low-dimensional Photo-functional Materials (The Chemical Society of Japan) which was held at The Chemistry Centre on May 22.
(http://photolowd.chemistry.or.jp/)

April 2015
œThe new term started. (Master's students:2, Bachelor's Students:4)

March 2015
œWe conducted research presentations in The 62nd JSAP Spring Meeting 2015 which was held at Tokai University on March 11-14. (Hiromitsu, Mizuno, Higashikage)

œA graduation ceremony was held for undergraduate and graduate students.


February 2015
œThesis presentations were conducted by undergraduate and graduate students.

December 2014
œDr. Mizuno conducted an invited presenation in International Conference for Leading and Young Materials Scientists which was held in China on December 21-25.

November 2014
œThe 8th Workshop for Refreshing Science in the Classroom was held at Shimane University. Dr. Mizuno was assigned the experiments on the dye-sensitized solar cells.

July 2014

œThe Japan Society of Applied Physics Chugoku-Shikoku Local Meeting was held at Shimane University on July 26.


April 2014

œThe new term started. (Master's students: 4CBachelor's students: 6)

œ
Dr. Mizuno has started new work as an assistant professor in the Department of Physics and Materials Science at Shimane University.


April 2013
œThe new term started. (Master's students: 5CBachelor's students: 3)

œDr. Senku TANAKA has moved to Kinki University.


March 2013
œA graduation ceremony was held for undergraduate and graduate students.


Graduation ceremony,
March 2013


June 2012
œOur paper about an iodine doping effect on the photocurrent generation in a Phthalocyanine/C60 heterojunction has been published on Thin Solid Films.

(
Effect of iodine doping of phthalocyanine on the photocurrent generation in a phthalocyanine/C60 heterojunction, S. Mizuta, et. al., Thin Solid Films, 520 (2012) 5761-5769.)

œAlex came to our laboratory through a
JSPS summer program from the University of Texas at Dallas. Welcome Alex!


Alex


April 2012
œ
Cherry-blossom viewing at Matsue Castle


We were interviewed by a newspaper publishing company during the cherry-blossom viewing.


Cherry blossoms of Matsue Castle


March 2011
œA graduation ceremony was held for undergraduate and graduate students.



Celebration for graduation 2011


January 2011
Our paper about an energy transfer between tetraphenylporphyrin and ZnO nanoparticle has been published on Chemical Physics Letters.

(Luminescence of tetraphenylporphyrin by an energy transfer from photoexcited ZnO nanoparticle: I. Hiromitsu et al., Chem. Phys. Lett., 501 (2010) 385.)

December 2010
Our paper about organic solar cells with a lithium phthalocyanine layer has been published on Applied Physics Letters.

(Improvement of power conversion efficiency of phthalocyanine/C60 heterojunction solar cells by inserting a lithium phthalocyanine layer at the indium-tin oxide/phthalocyanine interface : S. Tanakaet al., Appl. Phys. Lett., 97 (2010) 253306.)

August 2010
Our paper about a simple technique to achieve highly ordered molecular orientation in a H2 Pc film on an ITO substrate has been published on Japanese Journal of Applied Physics.
(Highly Ordered Molecular Orientation in a Phthalocyanine Film Deposited on a Well-Polished Indium-Tin Oxide Substrate: H. Ishihara et al. Jpn. J. Appl. Phys., 49 (2010) 081602.)

July 2010
We participated in ICSM2010 (International Conderence on Science and Technology of Synthetic Metals). (Hiromitsu, Tanaka)



ICSM2010


For more details, please see the PUBLICATIONS.