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Ghosh J, O’Neill J, Masteghin MG, Braddock I, Crean C, Dorey R, Salway H, Anaya M, Reiss J, Wolfe D, Sellin P. Surfactant-Dependent Bulk Scale Mechanochemical Synthesis of CsPbBr 3 Nanocrystals for Plastic Scintillator-Based X-ray Imaging. ACS Appl Nano Mater 2023; 6:14980-14990. [PMID: 37649835 PMCID: PMC10463220 DOI: 10.1021/acsanm.3c02531] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 07/21/2023] [Indexed: 09/01/2023]
Abstract
We report a facile, solvent-free surfactant-dependent mechanochemical synthesis of highly luminescent CsPbBr3 nanocrystals (NCs) and study their scintillation properties. A small amount of surfactant oleylamine (OAM) plays an important role in the two-step ball milling method to control the size and emission properties of the NCs. The solid-state synthesized perovskite NCs exhibit a high photoluminescence quantum yield (PLQY) of up to 88% with excellent stability. CsPbBr3 NCs capped with different amounts of surfactant were dispersed in toluene and mixed with polymethyl methacrylate (PMMA) polymer and cast into scintillator discs. With increasing concentration of OAM during synthesis, the PL yield of CsPbBr3/PMMA nanocomposite was increased, which is attributed to reduced NC aggregation and PL quenching. We also varied the perovskite loading concentration in the nanocomposite and studied the resulting emission properties. The most intense PL emission was observed from the 2% perovskite-loaded disc, while the 10% loaded disc exhibited the highest radioluminescence (RL) emission from 50 kV X-rays. The strong RL yield may be attributed to the deep penetration of X-rays into the composite, combined with the large interaction cross-section of the X-rays with the high-Z atoms within the NCs. The nanocomposite disc shows an intense RL emission peak centered at 536 nm and a fast RL decay time of 29.4 ns. Further, we have demonstrated the X-ray imaging performance of a 10% CsPbBr3 NC-loaded nanocomposite disc.
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Affiliation(s)
- Joydip Ghosh
- Department
of Physics, University of Surrey, Guildford GU2 7XH, U.K.
| | - Joseph O’Neill
- Department
of Physics, University of Surrey, Guildford GU2 7XH, U.K.
| | - Mateus G. Masteghin
- Advanced
Technology Institute, University of Surrey, Guildford GU2 7XH, U.K.
| | - Isabel Braddock
- Department
of Physics, University of Surrey, Guildford GU2 7XH, U.K.
| | - Carol Crean
- Department
of Chemistry, University of Surrey, Guildford GU2 7XH, U.K.
| | - Robert Dorey
- School
of Mechanical Engineering Sciences, University
of Surrey, Guildford GU2 7XH, U.K.
| | - Hayden Salway
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, U.K.
| | - Miguel Anaya
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, U.K.
- Departamento
Física de la Materia Condensada, Instituto de Ciencia
de Materiales de Sevilla, Universidad de
Sevilla−CSIC, Avenida Reina Mercedes SN, Sevilla 41012, Spain
| | - Justin Reiss
- Applied
Research
Laboratory, Materials Science and Engineering Department, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Douglas Wolfe
- Applied
Research
Laboratory, Materials Science and Engineering Department, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Paul Sellin
- Department
of Physics, University of Surrey, Guildford GU2 7XH, U.K.
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