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RIKEN Center for Emergent Matter Science Emergent Supramolecular Materials Research Team

Team Leader: Yong-Jin Pu (D.Eng.)

Research Summary

Yong-Jin Pu (D.Eng.)

We precisely control the energy levels, interstate transition rate, luminescence efficiency, spin multiplicity etc. of organic/inorganic semiconductors and nanoparticles by their dynamic and static molecular structure, shape/size, chemical composition, and assembly pattern, for creating innovative energy-related technologies.

Main Research Fields

  • Interdisciplinary Science & Engineering

Related Research Fields

  • Chemistry


  • Quantum dot
  • Semiconductor nanoparticle
  • Exciton management

Selected Publications

  • 1. Y.-J. Pu, D. Valverde, J.-C. Sancho-Garcia, Y. Olivier.:
    "Computational Design of Multiple Resonance-Type BN Molecules for Inverted Singlet and Triplet Excited States"
    Journal of Physical Chemistry A, 127, 10189-10196 (2023).
  • 2. N. Aizawa, Y.-J. Pu, Y. Harabuchi, A. Nihonyanagi, R. Ibuka, H. Inuzuka, B. Dhara, Y. Koyama, K. Nakayama, S. Maeda, F. Araoka, D. Miyajima.:
    "Delayed fluorescence from inverted singlet and triplet excited states"
    Nature, 609, 502-506 (2022).
  • 3. K. Enomoto, K. Takeda, N. Iwata, K. Adachi, T. Kikitsu, Y. Ishida, D. Hashizume, M. Tanaka, H. Kawakami, Y.-J. Pu.:
    "Colloidal CdS Quantum Dot Fibers Prepared by Electrospinning of Their Wet Gel for Quantum Nanowires"
    ACS Applied Nano Materials, 5, 3756-3762 (2022).
  • 4. K. Enomoto, R. Oizumi, N. Aizawa, T. Chiba, Y.-J. Pu.:
    "Energy Transfer from Blue-Emitting CsPbBr3 Perovskite Nanocrystals to Green-Emitting CsPbBr3 Perovskite Nanocrystals"
    Journal of Physical Chemistry C, 125, 19368-19373 (2021).
  • 5. J. Liu, K. Enomoto, K. Takeda, D. Inoue, Y.-J. Pu.:
    "Simple Cubic Self-Assembly of PbS Quantum Dots by Finely Controlled Ligand Removal through Gel Permeation Chromatography"
    Chemical Science, 12, 10354-10361 (2021).
  • 6. T. Lee, K. Enomoto, K. Ohshiro, D. Inoue, T. Kikitsu, H.-D. Kim, Y.-J. Pu, D. Kim.:
    "Controlling the Dimension of the Quantum Resonance in CdTe Quantum Dot Superlattices Fabricated via Layer-by-Layer Assembly"
    Nature Communications, 11, 5471 (2020).
  • 7. N. Aizawa, Y. Harabuchi, S. Maeda, Y.-J. Pu.:
    "Kinetic Prediction of Reverse Intersystem Crossing in Organic Donor-Acceptor Molecules"
    Nature Communications, 11, 3909 (2020).
  • 8. K. Enomoto, D. Inoue, Y.-J. Pu.:
    "Controllable 1D patterned assembly of colloidal quantum dots on PbSO4 nanoribbons"
    Advanced Functional Materials, 29, 1905175 (2019).
  • 9. Y.-J. Pu, Y. Koyama, D. Otsuki, M. Kim, H. Chubachi, Y. Seino, K. Enomoto, N. Aizawa.:
    "Exciplex Emissions Derived from Exceptionally Long-Distanced Donor and Acceptor Molecules"
    Chemical Science, 10, 9203-9208 (2019).
  • 10. Y.-J. Pu, R. Satake, Y. Koyama, T. Otomo, R. Hayashi, N. Haruta, H. Katagiri, D. Otsuki, D. Kim, T. Sato.:
    "Absence of delayed fluorescence and triplet-triplet annihilation in organic light emitting diodes with spatially orthogonal bianthracenes"
    Journal of Materials Chemistry C, 7, 2541 (2019).

Recent Research Results

Related Links

Lab Members

Principal investigator

Yong-Jin Pu
Team Leader

Core members

Kazushi Enomoto
Research Scientist
Ryutaro Komatsu
Research Scientist
Retno Miranti
Special Postdoctoral Researcher
Rahul Singh
Postdoctoral Researcher
Guanhao Liu
Postdoctoral Researcher

Contact Information

S302 Bioscience Bldg,
2-1 Hirosawa, Wako, Saitama
351-0198, Japan
Email: yongjin.pu [at] riken.jp