RIKEN Center for Emergent Matter Science Emergent Supramolecular Materials Research Team

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

Japanese Page

Research Summary

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

Keywords

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).