Harnessing Self‐Sensitized Scintillation by Supramolecular Engineering of CsPbBr <sub>3</sub> Nanocrystals in Dense Mesoporous Template Nanospheres
Abstract
Abstract Perovskite‐based nanoscintillators, such as CsPbBr 3 nanocrystals (NCs), are emerging as promising candidates for ionizing radiation detection, thanks to their high emission efficiency, rapid response, and facile synthesis. However, their nanoscale dimensions — smaller than the mean free path of secondary carriers — and relatively low emitter density per unit volume, limited by their high molecular weight and reabsorption losses, restrict efficient secondary carrier conversion and hamper their practical deployment. In this work, a strategy is introduced to enhance scintillation performance by organizing NCs into densely packed domains within porous SiO 2 mesospheres (MSNs). This engineered architecture achieves up to a 40‐fold increase in radioluminescence intensity compared to colloidal NCs, driven by improved retention and conversion of secondary charges, as corroborated by electron release measurements. This approach offers a promising pathway toward developing next‐generation nanoscintillators with enhanced performance, with potential applications in high‐energy physics, medical imaging, and space technologies.
Article Details
Authors (15)
Xiaohe Zhou
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure State Key Laboratory of Materials Processing and Die & Mould Technology School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan People's Republic of China
Matteo L. Zaffalon
Dipartimento di Scienza dei Materiali Università degli Studi di Milano‐Bicocca Via R. Cozzi 55 Milano I‐20125 Italy
Emanuele Mazzola
INFN Sezione di Milano Bicocca Milano I‐20126 Italy
Andrea Fratelli
Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
Francesco Carulli
Dipartimento di Scienza dei Materiali Università degli Studi di Milano‐Bicocca Via R. Cozzi 55 Milano I‐20125 Italy
Chenger Wang
Dipartimento di Scienza dei Materiali Università degli Studi di Milano‐Bicocca Via R. Cozzi 55 Milano I‐20125 Italy
Mengda He
School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China
Francesco Bruni
Dipartimento di Scienza dei Materiali Università degli Studi di Milano‐Bicocca Via R. Cozzi 55 Milano I‐20125 Italy
Saptarshi Chakraborty
Dipartimento di Scienza Dei Materiali, Università Degli Studi di Milano Bicocca, Via R. Cozzi 55, Milano 20125, Italy
Leonardo Poletti
IMEM‐CNR Parco Area delle Scienze 37/A Parma 43100 Italy
Francesca Rossi
Luca Gironi
INFN Sezione di Milano Bicocca Milano I‐20126 Italy
Francesco Meinardi
Dipartimento di Scienza dei Materiali Università degli Studi di Milano‐Bicocca Via R. Cozzi 55 Milano I‐20125 Italy
Liang Li
Sergio Brovelli
Dipartimento di Scienza Dei Materiali, Università Degli Studi di Milano Bicocca, Via R. Cozzi 55, Milano 20125, Italy