Radioluminescence from polymer dots based on thermally activated delayed fluorescence

Daiki Asanuma; Hieu Thi Minh Nguyen; Zuoyue Liu; Sachiko Tojo; Hajime Shigemitsu; Minoru Yamaji; Kiyohiko Kawai; Tadashi Mori; Toshiyuki Kida; Guillem Pratx; Mamoru Fujitsuka; Yasuko Osakada

doi:10.1039/d3na00308f

Radioluminescence from polymer dots based on thermally activated delayed fluorescence

Nanoscale Adv. 2023 May 23;5(13):3424-3427. doi: 10.1039/d3na00308f. eCollection 2023 Jun 27.

Authors

Daiki Asanuma¹, Hieu Thi Minh Nguyen², Zuoyue Liu¹, Sachiko Tojo¹, Hajime Shigemitsu³, Minoru Yamaji⁴, Kiyohiko Kawai^{1

5}, Tadashi Mori³, Toshiyuki Kida³, Guillem Pratx², Mamoru Fujitsuka^{1

6}, Yasuko Osakada^{1

6

7}

Affiliations

¹ SANKEN, Osaka University Mihogaoka 8-1, Ibaraki Osaka 567-0047 Japan yosakada@sanken.osaka-u.ac.jp fuji@sanken.osaka-u.ac.jp.
² Department of Radiation Oncology and Medical Physics, Stanford University 300 Pasteur Dr. Stanford CA 94305 USA pratx@stanford.edu.
³ Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan.
⁴ Division of Molecular Science, Graduate School of Science and Engineering, Gunma University Ota Gunma 373-0057 Japan.
⁵ Department of Life Science and Technology, Tokyo Institute of Technology B-52, 4259 Nagatsuta, Midori-ku Yokohama Kanagawa 226-8501 Japan.
⁶ Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan.
⁷ Institute for Advanced Co-Creation Studies, Osaka University Yamadagaoka 1-1, Suita Osaka 565-0871 Japan.

Abstract

We demonstrate that polymer dots doped with thermally activated delayed fluorescence (TADF) molecules clearly exhibit blue radio-luminescence upon hard X-ray and electron beam irradiation, which is a new design for nano-sized scintillators.