| Article | |
| Report number | arXiv:2404.14813 |
| Title | Ultrafast nanocomposite scintillators based on Cd-enhanced CsPbCl$_3$ nanocrystals in polymer matrix |
| Author(s) | Erroi, Andrea (Milan Bicocca U.) ; Carulli, Francesco (Milan Bicocca U.) ; Cova, Francesca (Milan Bicocca U.) ; Frank, Isabel (CERN ; Munich U.) ; Zaffalon, Matteo L. (Milan Bicocca U.) ; Llusar, Jordi ; Mecca, Sara (Milan Bicocca U.) ; Cemmi, Alessia (ENEA, Rome) ; Di Sarcina, Ilaria (ENEA, Rome) ; Rossi, Francesca (CNR, Italy) ; Beverina, Luca (Milan Bicocca U.) ; Meinardi, Francesco (Milan Bicocca U.) ; Infante, Ivan (IKERBASQUE, Bilbao) ; Auffray, Etiennette (CERN) ; Brovelli, Sergio (Milan Bicocca U.) |
| Publication | 2024-04-23 |
| Imprint | 2024-04-23 |
| Number of pages | 10 |
| In: | ACS Energy Lett. 9, 5 (2024) pp.2333–2342 |
| DOI | 10.1021/acsenergylett.4c00778 (publication) |
| Subject category | physics.chem-ph ; Chemical Physics and Chemistry ; cond-mat.mtrl-sci |
| Abstract | Lead halide perovskite nanocrystals (LHP-NCs) embedded in polymer matrices are gaining traction for next-generation radiation detectors. While progress has been made on green-emitting CsPbBr$_3$ NCs, scant attention has been given to the scintillation properties of CsPbCl$_3$ NCs, which emit size-tunable UV-blue light matching the peak efficiency of ultrafast photodetectors. In this study, we explore the scintillation characteristics of CsPbCl$_3$ NCs produced through a scalable method and treated with CdCl$_2$. Spectroscopic, radiometric and theoretical analysis on both untreated and treated NCs uncover deep hole trap states due to surface undercoordinated chloride ions, eliminated by Pb to Cd substitution. This yields near-perfect efficiency and resistance to polyacrylate mass-polymerization. Radiation hardness tests demonstrate stability to high gamma doses while time-resolved experiments reveal ultrafast radioluminescence with an average lifetime as short as 210 ps. These findings enhance our comprehension of LHP NCs' scintillation properties, positioning CsPbCl$_3$ as a promising alternative to conventional fast scintillators. |
| Copyright/License | preprint: (License: CC BY-NC-SA 4.0) publication: © 2024 American Chemical Society |
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Record created 2024-07-04, last modified 2024-10-27
