Dr. Kirill Mitrofanov (Staff Scientist)
Email: kirill.mitrofanov at

Dr. Kirill Mitrofanov graduated from Ryazan State Radio Engineering Institute in 2008. In 2012 he defended his thesis on the topic of the chalcogenide semiconductors phase change process. From August 2012 he began to work as a postdoctoral fellow in the Functional Materials Group (currently Systematic Materials Design Group) of the Nanoelectronics Research Institute in the National Institute for Advanced Industrial Science and Technology (AIST) in Tsukuba, Japan. Dr. Mitrofanov carried out multiple studies in x-ray absorption near edge structure and extended x-ray absorption fine structure experimental techniques within experimental proposals at SPring-8 synchrotron (Japan) on such topics as resistivity drift in phase-change memory and atomic and the electronic structure of topological crystalline insulators. Dr. Mitrofanov also studied structural evolution processes in chalcogenide phase-change materials by means of ultrafast time-resolved diffraction using a hard x-ray free electron laser. During his work as a research staff in AIST, Dr. Mitrofanov worked on the fabrication and optimization of phasechange random access memory based on Ge-Sb-Te compounds and interfacial phasechange memory devices based on chalcogenide superlattices utilizing electric and magnetic fields induced switching phenomena. From 2020 he joined the Organic Optoelectronics Unit team in OIST (Okinawa, Japan).
ORCID: 0000-0002-2775-4123

Dr. Zesen Lin (Postdoctoral Researcher)
Email: zesen.lin at

Zesen Lin received his doctor’s degree in organic optoelectronics from Kyushu University in 2020 (supervisor: Prof. Chihaya Adachi). From 2020 he joined the Organic Optoelectronics Unit team in OIST (Okinawa, Japan). His current research interest focuses on the development and mechanism study organic long-persistent materials.
ORCID: 0000-0003-3876-9221

Dr. Hayato Ouchi (Postdoctoral Researcher)
Email: hayato.ouchi at

Dr. Hayato Ouchi was born in 1992 in Ibaraki, Japan. He studied self-assemblies of functional dyes and their applications to organic devices under the guidance of Prof. Shiki Yagai at Chiba University and received his PhD in 2020. He then joined the Organic Optoelectronic Unit at Okinawa Institute of Science and Technology Graduate University.
ORCID: 0000-0002-8167-6699

Dr. Sri Lakshmi Venkata Narayana Yemineni (Postdoctoral Researcher)
Email: sri.yemineni at

Dr. S L V Narayana Yemineni was born in 1986 in Andhra Pradesh, India. He was graduated from Andhra University, Vizag, in 2008. He was given the Ph.D. degree for his thesis entitled “Nano/Micro-Scale Macromolecular Materials: Design, Synthesis, Self-Assembly, Lighting and Photonic Applications” in 2016, from the University of Hyderabad, India, under the supervision of Prof. Rajadurai Chandrasekar. From April 2016 he moved to Electronic Functional Macromolecules Group (Dr. Masayoshi Higuchi, Group Leader) in National Institute for Materials Science (NIMS), Tsukuba, Japan as a postdoctoral researcher. His postdoctoral research is focused on the design and synthesis of various metallo-supramolecular polymers (MSPs) for proton, ion conduction, and electrochromic applications. From April 2021 he joined the Organic Optoelectronics Unit team in OIST, Okinawa, Japan. His current research mainly focuses on the design and synthesis of donor-acceptor type dendrimers and copolymers for organic long-persistent materials application.
ORCID: 0000-0001-7024-640X


Qizheng Zhang (Ph.D. student)
Rengo Yoshioka (Ph.D. student)

Rengo Yoshioka
Email: rengo.yoshioka at

Rengo Yoshioka graduated from Tokyo University of Agriculture and Technology (TUAT) in 2020. He was working to investigate photoreaction mechanisms of molecular complexes at the Graduate school of BASE in TUAT. He joined Organic Optoelectronics Unit in March 2021 as a research internship, then became a PhD student from September 2021.



Emiko Asato
Email: easato at

Emiko Asato is from Itoman, a city the southern most of Okinawa Island. After Itoman high school, she lived in Nagasaki, Quanzhou (China), Guangzhou (China), Tokyo, Guam, Okinawa, Gold Coast (Australia) then Okinawa. She has been working as a research unit administrator at OIST for the Neural Computation Unit from 2004 and the Organic Optoelectronics Unit from 2020. Recently, she began to practice Kenjutsu, Katori Shinto Ryu with co-workers after work.

Former members

Aleksandr Sorvanov (2020/09-2020/12 Rotation student)