Pulse-radiolysis study of radioluminescence in colloidal lead halide perovskite quantum dots: comparison with photoexcitation

Zheming Su; Setsuka Homma; Quanlin Yu; Yoshio Mizuta; Yusa Muroya; Toshiya Muto; Jinfeng Yang; Tomonao Hosokai; Minoru Yamaji; Tomohiro Sakatani; Hajime Shigemitsu; Tadashi Mori; Toshiyuki Kida; Mamoru Fujitsuka; Yasuko Osakada

doi:10.1016/j.radphyschem.2026.113989

Journal article Pulse-radiolysis study of radioluminescence in colloidal lead halide perovskite quantum dots: comparison with photoexcitation

; ; ; ; ; ; ; ; ; ;

; ; ; ;

Download file (1.9 MB)
Download as zip (1.57 MB)

Collection

Citation

Zheming Su, Setsuka Homma, Quanlin Yu, Yoshio Mizuta, Yusa Muroya, Toshiya Muto, Jinfeng Yang, Tomonao Hosokai, Minoru Yamaji, Tomohiro Sakatani, Hajime Shigemitsu, Tadashi Mori, Toshiyuki Kida, Mamoru Fujitsuka, Yasuko Osakada. Pulse-radiolysis study of radioluminescence in colloidal lead halide perovskite quantum dots: comparison with photoexcitation. RADIATION PHYSICS AND CHEMISTRY. 2026, 246 (), 113989. https://doi.org/10.1016/j.radphyschem.2026.113989

(BibTeX)

Description:

(abstract)

Lead halide perovskite quantum dots (QDs) have emerged as promising scintillator materials, however, their emission behavior under ionizing radiation in solution remains insufficiently characterized. In this study, we investigated the radiation-induced luminescence of commercially sourced colloidal lead halide perovskite QDs in toluene (CsPbCl2Br, CsPbBr3 and FAPbBr3) using pulse radiolysis with high-energy electron beams.
The radioluminescence spectra closely coincides with the steady-state photoluminescence spectra, indicating that the same band-edge emissive states are populated under both optical and ionizing radiation excitation. Despite significant difference in photoluminescence quantum yields (0.44-0.83), the relative radioluminescence intensities show no direct correlation with photoluminescence efficiencies. This result is consistent with the contribution of solution-phase radiation processes, in which excitation is generated not only within the nanocrystals but also through radiolytically produced solvent-derived species. In addition, the emission spectrum, linewidths and intensities remain unchanged after gamma-ray irradiation up to 17 Gy, indicating that these colloidal QDs retain their photophysical characteristics within this dose range.
These results provide an experimental basis for distinguishing optical excitation from ionizing-radiation-induced excitation in colloidal perovskite QDs and demonstrate the utility of pulse radiolysis for evaluating radioluminescence processes in luminescent nanomaterials. Rather than introducing a new scintillator composition, this study provides a controlled experimental comparison of optical and ionizing-radiation excitation in a solution-phase perovskite QD platform.

Rights: