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Temperature dependent scintillation properties and mechanisms of (PEA)2PbBr4 single crystals.
van Blaaderen, Jacob Jasper; Maddalena, Francesco; Dang, Cuong; Birowosuto, Muhammad Danang; Dorenbos, Pieter.
Afiliação
  • van Blaaderen JJ; Delft University of Technology, Faculty of Applied Sciences, Department of Radiation Science and Technology Mekelweg 15 2629 JB Delft The Netherlands J.J.vanBlaaderen@tudelft.nl P.Dorenbos@tudelft.nl.
  • Maddalena F; Nanyang Technological University, School of Electrical and Electronic Engineering Nanyang Avenue 50 639798 Singapore.
  • Dang C; Nanyang Technological University, School of Electrical and Electronic Engineering Nanyang Avenue 50 639798 Singapore.
  • Birowosuto MD; Lukasiewicz Research Network-PORT Polish Center for Technology Development Stablowicka 147 54-066 Wroclaw Poland J.J.vanblaaderen@tudelft.nl.
  • Dorenbos P; Delft University of Technology, Faculty of Applied Sciences, Department of Radiation Science and Technology Mekelweg 15 2629 JB Delft The Netherlands J.J.vanBlaaderen@tudelft.nl P.Dorenbos@tudelft.nl.
J Mater Chem C Mater ; 10(32): 11598-11606, 2022 Aug 18.
Article em En | MEDLINE | ID: mdl-36090966
In this work the scintillation properties of PEA2PbBr4 are studied as function of temperature, accessing the potential use of these materials for low temperature applications. The scintillation properties and mechanism have been studied using a combination of temperature dependent photoluminescence emission and excitation, X-ray excited emission and decay measurements. At room temperature the X-ray excited emission is dominated by the 442 nm emission with a lifetime of 35.2 ns. Under UV-Vis photon excitation an additional emission peak is observed at 412 nm. At 10 K, both X-ray and UV-Vis photon excited emission spectra show a narrow emission peak at 412 nm and a broad emission band centred around 525 nm with a lifetime of 1.53 ns (24%) and 154 ns (76%) respectively. The exact nature of the observed emission peaks is not known. For this reason two potential mechanisms explaining the difference between UV-Vis photon and X-ray excitation and their temperature dependent emissions are explored. The total spectral intensity decreases to 72% of the intensity at room temperature at 10 K. It is suggested that the observed negative thermal quenching behaviour results from a combination of more self absorption and a higher degree of self trapped exciton formation under X-ray excitation. Based on the observed fast decay component at 10 K and light yield of 9400 photons per MeV at room temperature, showing only a 28% decrease at 10 K, could make this material potentially interesting for low temperature and fast timing applications.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Mater Chem C Mater Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Mater Chem C Mater Ano de publicação: 2022 Tipo de documento: Article