Nanocrystalline Lead Halide Perovskites to Boost Time-of-Flight Performance of Medical Imaging Detectors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00373627" target="_blank" >RIV/68407700:21340/24:00373627 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00602014

Result on the web

<a href="https://doi.org/10.1002/admi.202300659" target="_blank" >https://doi.org/10.1002/admi.202300659</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/admi.202300659" target="_blank" >10.1002/admi.202300659</a>

Result language

angličtina

Original language name

Nanocrystalline Lead Halide Perovskites to Boost Time-of-Flight Performance of Medical Imaging Detectors

Original language description

Time-of-flight (TOF) technique, traditionally used in high energy physics (HEP) and positron emission tomography (PET), is now being explored for lower energy applications like computed tomography (CT). Regardless of the application, pushing the current boundaries in time resolution calls for novel technologies and materials exhibiting ultra-fast time response. Semiconductor nanocrystals like cesium lead halide perovskites (CsPbBr3), benefiting from quantum confinement effects, feature ultra-fast decay and, when combined with a suitable bulk scintillator following a heterostructure concept, can also provide the necessary stopping power. In this work, thin films of CsPbBr3 on top of BGO, LYSO:Ce, and GAGG:Ce,Mg wafers are fabricated to test their impact on the single crystal scintillator time resolution under soft X-rays excitation (about 10 keV). It is demonstrated that the CsPbBr3 layer significantly improves the overall time resolution in all cases, achieving up to a tenfold improvement with BGO and GAGG:Ce,Mg. Under 511 keV γ-rays, a proof-of-concept of the heterostructure design for TOF-PET using CsPbBr3 thin film deposited on GAGG:Ce,Mg bulk crystal is successfully tested. Shared events depositing energy in both materials are identified, resulting in more than twofold improved coincidence time resolution: 118 ± 4 ps full-width-at-half-maximum (FWHM) compared to the 272 ± 8 ps of solely GAGG:Ce,Mg.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

21001 - Nano-materials (production and properties)

Project

<a href="/en/project/GA23-05615S" target="_blank" >GA23-05615S: Scintillating multimodal materials and quantum heterostructures.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Advanced Materials Interfaces

ISSN

2196-7350

e-ISSN

2196-7350

Volume of the periodical

11

Issue of the periodical within the volume

10

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

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UT code for WoS article

001143117600001

EID of the result in the Scopus database

2-s2.0-85182492939