Outline
Photochemistry is expected to play a versatile role in
electronics, energy, medicine/heath care, and functional
materials in modern society. In molecular donor-acceptor
(D-A) systems, charge-transfer (CT) has been regarded as
“static exciton” governed by Coulombic interaction (left
bottom of Figure 1). However, in addition to Coulombic
interaction, dynamic effects including movement of atomic
nucleus and lattice as well as spin-orbit interaction
influence behavior of electron and spin with the passage of
time ranging from femtoseconds to seconds (defined as
“dynamic exciton”, right middle of Figure 1). For instance,
recently power conversion efficiencies of organic
photovoltaics (OPV) have been improved remarkably, but there
is a limit to understanding the underlying mechanism solely
from a framework of “static exciton”, as things stand at the
moment, becoming a bottleneck of high-performance OPV.
Moreover, to get more deep insight into the dynamic effects
occurring at primary stages of photophysical and
photochemical events, it is needed to exploit precise
spectroscopic measurements and theoretical treatments. In
this project, we aim to solve the above issues by merging
rational molecular design based on the dynamic effects with
world-leading high-resolution spectroscopies and unique
theoretical analyses. In particular, we focus on
manipulating CT states for energy conversion such as organic
light-emitting diodes (OLED) and OPV in term of
electron-vibration and spin-orbit couplings.
Head investigator
Hiroshi Imahori（Professor, Graduate School of
Engineering, Kyoto University, Japan）
Period
FY2020–2024
Area ID
20A201
Member
A01 Group Creation of Dynamic
Exciton
Project title：
Bridge-Mediated Dynamic Exciton
Leader：
Hiroshi Imahori (Professor, Graduate
School of Engineering, Kyoto
University, Japan,
A01 Group leader
Contributor：
Tomokazu Umeyama (Professor, Graduate
School of Engineering, University of
Hyogo, Japan）
Contributor：
Miki Hasegawa (Professor, Aoyama Gakuin
University)
Project ID：
20H05832
http://www.moleng.kyoto-u.ac.jp/~moleng_05/index_e.html
Project title：
Development of organic donor-acceptor
materials for dynamic exciton control
Leader：
Hiroko Yamada (Professor, Institute
of Chemical Research, Kyoto
University, Japan)
Collaborator：
Naoki Aratani (Professor, Nara Institute
of Science and Technology, Japan)
Collaborator：
Hironobu Hayashi (Principal Researcher,
NIMS, Japan)
Collaborator：
Mitsuaki Yamauchi (Assistant Professor,
Kyoto University, Japan)
Project ID：
20H05833
https://www.scl.kyoto-u.ac.jp/~oec/
Project title：
Creation of Oganic-Inorganic
Donor・Acceptor Materials for Control of
Dynamic Exciton
Leader：
Eri Sakuda (Associate Professor,
Graduate School of Engineering,
Nagasaki University, Japan)
Project ID：
20H05834
http://www.cms.nagasaki-u.ac.jp/lab/sakutai/index_e.htm
A02 Group Analysis of Dynamic
Exciton
Project title：
Interaction in Dynamic Exciton Studied
by Electron Spin Polarization Imaging
Leader：
Yasuhiro Kobori (Professor, Molecular
Photoscience Research Center, Kobe
University, Japan,
A02 Group leader ）
Collaborator：
Masaaki Fuki (Research Associate,
Molecular Photoscience Research Center,
Kobe University, Japan)
Project ID：
20H05835
http://www2.kobe-u.ac.jp/~ykobori/frame%20-%20Eng.html
Project title：
Nanometer-Scale Spatial Evaluation of
Dynamic Exciton by Transient Microwave
Spectroscopy
Leader：
Akinori Saeki (Professor, Graduate
School of Engineering, Osaka
University, Japan）
Project ID：
20H05836
http://www.chem.eng.osaka-u.ac.jp/~saeki/cmpc/
Project title：
Spatiotemporal Analysis of Dynamic
Exciton by Solid-State NMR
Leader：
Katsuaki Suzuki (Assistant professor,
Institute for Chemical Research, Kyoto
University, Japan）
Project ID：
20H05837
http://molmat.kuicr.kyoto-u.ac.jp/
Project title：
Wideband Transient Absorption
Spectroscopy for the Analysis of Dynamic
Exciton
Leader：
Akira Yamakata (Professor, Okayama
University, Japan）
Collaborator：
Kosaku Kato (Postdoctoral Researcher,
Okayama University, Japan）
Project ID：
20H05838
https://www.toyota-ti.ac.jp/photochem/index.htm
Project title：
Theory of Dynamic Exciton
Leader：
Masahiro Higashi (Professor, Nagoya
University, Japan）
Contributor：
Kanami Sugiyama (Assistant Professor,
Kyoto University, Japan）
Collaborator：
Hiroshi Nakano (Researcher, National
Institute of Advanced Industrial Science
and Technology: AIST, Japan）
Project ID：
20H05839
https://sites.google.com/view/higashi-group/
A03 Group Function of Dynamic
Exciton
Project title：
Material Design Based on Dynamic
Excition and Their Applications
Leader：
Hironori Kaji (Professor, Institute
for Chemical Research, Kyoto
University, Japan,
A03 Group leader )
Project ID：
20H05840
http://molmat.kuicr.kyoto-u.ac.jp/index-e.html
Project title：
Development of Functional Organic
Semiconductors Towards Utilization of
Dynamic Exciton and Their Application to
Organic Solar Cells
Leader：
Yutaka Ie (Professor, The Institute
of Scientific and Industrial Research,
Osaka University,
Japan）Contributor：Tomohiro Higashino
(Associate Professor, Graduate School
of Engineering, Kyoto University,
Japan)
Collaborator：
Seihou Jinnai (Assistant Professor, The
Institute of Scientific and Industrial
Research, Osaka University, Japan）
Project ID：
20H05841
https://www.sanken.osaka-u.ac.jp/labs/omm/
Project title：
Optical Control of the Plasma Membrane
Functions by Using Dynamic Exciton
Leader：
Tatsuya Murakami (Professor, Graduate
School of Engineering, Toyama
Prefectural University, Japan)
Contributor：
Tomohiro Numata (Lecturer, Fukuoka
University Faculty of Medicine, Japan)
Project ID：
20H05842
https://www.pu-toyama.ac.jp/BR/murakami/
Project title：
Development of sp3 C-H Functionalization
of Simple Alkane by Dynamic Exciton
Photocatalyst
Leader：
Harunobu Mitsunuma (Assistant
professor, Graduate School of
Pharmaceutical Sciences, The
University of Tokyo, Japan）
Project ID：
20H05843
http://www.f.u-tokyo.ac.jp/~kanai/e_index.html
Recruited member (FY 2023-2024)
A01 Group Creation of Dynamic Exciton
Project title：
Expression and analysis of dynamic excitons in
dipyrin nanoarrays
Leader：
Ryota Sakamoto (Professor, Graduate School of
Science, Tohoku University)
Collaborator：
Ryojyun Toyoda (Assistant Professor, Graduate
School of Science, Tohoku University)
Project ID：
23H03937
https://web.tohoku.ac.jp/sakutai/
Project title：
Development of dynamic excitons in
supramolecular crystals containing coordination
complexes
Leader：
Shinnnosuke Horiuchi (Lecturer, The
University of Tokyo)
Project ID：
23H03941
http://hiraoka.c.u-tokyo.ac.jp/member/horiuchi-about/
Project title：
Development of Circularly Polarized Luminescent
Chiral Compounds with Donor-Acceptor Structure
Leader：
Koji Nakano (Associate Professor, Tokyo
University of Agriculture and
Technology)
Collaborator：
Kei-ichi Noguchi (Professor, Tokyo University of
Agriculture and Technology)
Project ID：
23H03944
http://web.tuat.ac.jp/~nakano/
Project title：
Development of dynamic-exciton surface utilizing
sulfur-inserted perylene bisimide
Leader：
Norihito Fukui (Associate Professor, Nagoya
University)
Project ID：
23H03947
http://www.chembio.nagoya-u.ac.jp/labhp/organic1/member/74_fukui.html
Project title：
Dynamic Exciton with a Novel Box-shaped Electron
Acceptor Molecule
Leader：
Midori Akiyama (Assistant Professor, Graduate
School of Engineering, Kyoto University)
Project ID：
23H03950
http://www.moleng.kyoto-u.ac.jp/~moleng_05/
Project title：
Development of organic phosphorescence materials
based on “dynamic excitons”
Leader：
Yosuke Tani (Assistant Professor, Graduate
School of Science, Osaka University)
Project ID：
23H03955
http://www.chem.sci.osaka-u.ac.jp/lab/ogawa/members.html
Project title：
Synthesis of circularly accumulated π-electron
systems for dynamic-exciton analysis
Leader：
Masayoshi Takase (Associate Professor,
Graduate School of Science and Engineering,
Ehime University)
Project ID：
23H03964
http://chem.sci.ehime-u.ac.jp/~orgchem1/
Project title：
Development of chiral doublet dynamic exciton
materials
Leader：
Ken Albrecht (Associate Professor, Institute
for Materials Chemistry and Engineering,
Kyushu University)
Project ID：
23H03966
https://www.alken-lab.com/
Project title：
Electron donor-acceptor oligomer formation
templated by circular dynamic exciton assemblies
Leader：
Junpei Yuasa (Professor, Department of
Applied Chemistry, Tokyo University of
Science)
Project ID：
23H03973
https://www.rs.tus.ac.jp/yuasaj/member.html
A02 Group Analysis of Dynamic Exciton
Project title：
Effects of bulk-heterojunction interface structure
and molecular quadrupole on exciton dissociation
processes in organic solar cells
Leader：
Hiroyuki Yoshida (Professor, Graduate School of
Engineering, Chiba University)
Project ID：
23H03939
https://adv.chiba-u.jp/nano/yoshida_lab/
Project title：
Theoretical clarification of fundamental mechanisms
of dynamic exciton in energy conversion systems
Leader：
Hiroyuki Tamura (Project Associate Professor,
Research Center for Advanced Science and
Technology, The University of Tokyo)
Project ID：
23H03942
https://www.rcast.u-tokyo.ac.jp/ja/research/people/staff-tamura_hiroyuki.html
Project title：
Spin-sublevel dynamics of triplet exciton
Leader：
Tadaaki Ikoma (Professor, Graduate School of
Science and Technology, Niigata
University)
Project ID：
23H03945
http://chem.sc.niigata-u.ac.jp/~ikoma/
Project title：
Mechanism of offset-less charge separation of
dynamic excitons
Leader：
Yasunari Tamai (Assistant Professor, Department
of Polymer Chemistry, Graduate School of
Engineering, Kyoto University)
Project ID：
23H03951
http://www.photo.polym.kyoto-u.ac.jp/
Project title：
Analyzing diffusion of dynamic exciton in nanoscale
heterogeneous environments with ultrafast imaging
Leader：
Hikaru Sotome (Assistant Professor, Graduate
School of Engineering Science, Osaka
University)
Project ID：
23H03956
http://www.chem.es.osaka-u.ac.jp/laser/index.html
Project title：
Understanding and control of dynamic exciton
phenomena via real-time high-resolution virtual
observation
Leader：
Hiroki Uratani (Program-Specific Assistant
Professor, Graduate School of Engineering, Kyoto
University)
Project ID：
23H03976
https://researchmap.jp/huratani
Project title：
Real-space and real-time investigations of dynamic
exciton in a two-dimensional donor-acceptor model
system
Leader：
Kensuke Kimura (Special Postdoctoral Researcher,
RIKEN Cluster for Pioneering Research)
Project ID：
23H03979
http://www2.riken.jp/Kimlab/index.html
A03 Group Function of Dynamic Exciton
Project title：
Virtual screening for highly efficient OLED
materials: exploring dynamic excitonic properties
Leader：
Naoya Aizawa (Assistant Professor, Graduate
School of Engineering, Osaka University)
Project ID：
23H03958
https://www.n-aizawa.com
Project title：
The dynamics of betaine radical and its application
to CO2 reduction coupled with oxidative
transformation
Leader：
Ryosuke Matsubara (Associate Professor,
Department of Chemistry, Kobe University)
Project ID：
23H03961
http://www2.kobe-u.ac.jp/~mhayashi/
Project title：
Dynamics of Exciton Dissociation Processes in
Non-Fullerene Organic Thin-Film Solar Cells
Leader：
Azusa Muraoka (Associate Professor, Japan
Women’s University)
Project ID：
23H03975
http://mcm-www.jwu.ac.jp/~muraoka/
Project title：
Development of photon upconversion toward blue
emission using dynamic exciton
Leader：
Seiichiro Izawa (Associate Professor, Tokyo
Institute of Technology)
Collaborator：
Keisuke Fujimoto (Assistant Professor, Shizuoka
University)
Project ID：
23H03978
https://www.msl.titech.ac.jp/member/profile/izawa.html
Recruited member (FY 2021-2022)
A01 Group Creation of Dynamic Exciton
Project title：
Development of a Novel Box-Shaped
Electron-Acceptor for Control of Dynamic Exciton
Leader：
Midori Akiyama (Assistant Professor, Graduate
School of Engineering, Kyoto
University)
Project ID：
21H05385
http://www.moleng.kyoto-u.ac.jp/~moleng_05/
Project title：
Design and Synthesis of Organic Semiconductor
with Separated Molecular Orbitals within the
Molecular Structure
Leader：
Masahiko Saito (Assistant Professor, Graduate
School of Advanced Science and Engineering,
Hiroshima University)
Collaborator：
Kim Hyung Do (Assistant Professor, Graduate
School of Engineering, Kyoto University)
Project ID：
21H05397
https://osaka.hiroshima-u.ac.jp
Project title：
Development of Solution Processable Doublet
Emitters
Leader：
Ken Albrecht (Associate Professor, Institute
for Materials Chemistry and Engineering,
Kyushu University)
Project ID：
21H05399
https://www.alken-lab.com/
Project title：
Creation of Axially Chiral Luminescent Complexes
for Dynamic Excitons
Leader：
Toshikazu Ono (Associate Professor,
Department of Applied Chemistry, Graduate
School of Engineering, Kyushu
University)
Project ID：
21H05400
http://www.chem.kyushu-u.ac.jp/~yhisaeda/
Project title：
CT-Assisted Circular Dynamics Exciton
Leader：
Junpei Yuasa (Associate Professor, Department
of Applied Chemistry, Tokyo University of
Science)
Project ID：
21H05404
https://www.rs.tus.ac.jp/yuasaj/member.html
Project title：
Development of Pure Blue Thermally Activated
Delayed Fluorescence Materials by Dynamic
Exciton Control
Leader：
Susumu Oda (Assistant Professor, School of
Science, Kwansei Gakuin University)
Collaborator：
Takuji Hatakeyama (Professor, Graduate School of
Science, Kyoto University, Japan)
Project ID：
21H05408
https://sci-tech.ksc.kwansei.ac.jp/~hatakeyama/index.html
A02 Group Analysis of Dynamic Exciton
Project title：
Study of a Role of Non-Fullerene Acceptor’s Large
Permanent Quadrupole Moment on the Dissociation
Process of Dynamic Exciton
Leader：
Hiroyuki Yoshida (Professor, Graduate School of
Engineering, Chiba University)
Project ID：
21H05384
https://adv.chiba-u.jp/nano/yoshida_lab/
Project title：
Charge Separation Mechanism of Dynamic Excitons at
Donor/Acceptor Interface
Leader：
Yasunari Tamai (Assistant Professor, Department
of Polymer Chemistry, Graduate School of
Engineering, Kyoto University)
Project ID：
21H05394
http://www.photo.polym.kyoto-u.ac.jp/
Project title：
Visualization of Time Evolution of Ion-Pair Distance
in Dynamic Exciton Using Multiple Excitation
Leader：
Hikaru Sotome (Assistant Professor, Graduate
School of Engineering Science, Osaka
University)
Project ID：
21H05395
http://www.chem.es.osaka-u.ac.jp/laser/index.html
Project title：
Exciton and Charge Carrier Dynamics in Organic
Photovoltaic Cells Studied by Time-Resolved
Terahertz Spectroscopy
Leader：
Kaoru Ohta (Researcher, Molecular Photoscience
Research Center, Kobe University)
Project ID：
21H05396
http://www2.kobe-u.ac.jp/~tominaga/
Project title：
Analysis of Dynamic Exciton in Singlet Fission
Leader：
Taku Hasobe (Professor, Faculty of Science and
Technology, Keio University)
Project ID：
21H05403
http://www.chem.keio.ac.jp/~hasobe/
Project title：
Exploration of Delocalized Frenkel Excitons at
Well-Ordered Organic Semiconductor Donor-Acceptor
Heterojunctions Exhibiting the Band Transport
Leader：
Yasuo Nakayama (Associate Professor, Department
of Pure and Applied Chemistry, Tokyo University of
Science)
Project ID：
21H05405
https://www.rs.tus.ac.jp/oml/index.html
Project title：
Development and Application of Real-Time Simulation
Methods for Dynamic Exciton Phenomena in Molecular
Aggregates
Leader：
Hiroki Uratani (Assistant Professor, School of
Advanced Science and Engineering, Waseda
University)
Collaborator：
Hiromi Nakai (Professor, School of Advanced Science
and Engineering, Waseda University)
Project ID：
21H05407
https://researchmap.jp/huratani?lang=ja
Project title：
Spatio-Temporal Control of a Charge Transfer Exciton
by Coherent Excitation of Molecular Vibrations
Leader：
Kensuke Kimura (Special Postdoctoral Researcher,
RIKEN Cluster for Pioneering Research)
Project ID：
21H05412
http://www2.riken.jp/Kimlab/index.html
A03 Group Function of Dynamic Exciton
Project title：
Catalytic Generation of Sulfur Cation Radical
Species by Dynamic Exciton and Its Application to
Bond Formation Reactions
Leader：
Kazunori Nagao (Assistant Professor, Division of
Pharmaceutical Sciences, Graduate School of
Medical Sciences, Kanazawa University)
Project ID：
21H05388
https://seimitsu.w3.kanazawa-u.ac.jp
Project title：
Development of Visible Light-Driven Methods for
Radical Generation Using Dynamic Excitons
Leader：
Masakazu Nambo (Designated Associate Professor,
Institute of Transformative Bio-Molecules
(WPI-ITbM), Nagoya University)
Project ID：
21H05390
https://www.itbm.nagoya-u.ac.jp/ja/members/m-nambo/
Project title：
Understanding and Controlling of Exciton Dynamics in
Light-Emitting Molecules
Leader：
Masashi Mamada (Assistant professor, Faculty of
Engineering, Kyushu University)
Project ID：
21H05401
http://www.cstf.kyushu-u.ac.jp/~adachilab/lab/
Project title：
Dynamical Processes of Charge-Transfer Excitons at
the Interface of Organic Thin-Film Solar Cells
Leader：
Azusa Muraoka (Associate Professor, Japan
Women’s University)
Project ID：
21H05406
http://mcm-www.jwu.ac.jp/~muraoka/
Project title：
Photon Upconversion Through Dynamic Exciton
Leader：
Seiichiro Izawa (Assistant Professor, Institute
for Molecular Science)
Project ID：
21H05411
https://www.ims.ac.jp/research/assist/izawa.html
Project title：
Virtual Screening of “Dynamic Excitions” for OLED
Materials
Leader：
Naoya Aizawa (Assistant Professor, Graduate
School of Engineering, Osaka University)
Project ID：
21H05413
https://researchmap.jp/naoya-aizawa/
Advisory
Domestic
Hiroshi Masuhara （Professor
Emeritus of Osaka University; Professor at National
Yang Ming Chiao Tung University）
Yoshito Tobe （Professor Emeritus of
Osaka University; Professor at National Yang Ming
Chiao Tung University ）
Katsumi Tokumaru （Professor
Emeritus of Tsukuba University）
Shigeyoshi Sakaki （Professor
Emeritus of Kyoto University）
Toshihiro Ohnishi （Specially-appointed professor at Osaka
University, Fellow of Sumitomo Chemical
Corporation）
International
Paul W.M Blom （Professor, Director,
Max Planck Institute for Polymer Research, Germany）
https://www.mpip-mainz.mpg.de
Itamar Willner （Professor,
Institute of Chemistry, The Hebrew University of
Jerusalem, Israel）
http://chem.ch.huji.ac.il/willner/
Prashant V. Kamat （Professor, John
A Zahm Professor of Science, University of Notre
Dame, USA; Editor-in-Chief in ACS Energy Letters）
https://www3.nd.edu/~kamatlab/
Michael R. Wasielewski （Professor,
Department of Chemistry, Northwestern University,
USA）
http://chemgroups.northwestern.edu/wasielewski/
