0D defects in isostructural Zn-based single crystals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00616721" target="_blank" >RIV/68378271:_____/24:00616721 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/24:00616721

Výsledek na webu

<a href="https://www.cfi.lu.lv/fileadmin/user_upload/lu_portal/projekti/cfi/Konferences/LUMDETR_2024/Abstracts/BOOK_OF_ABSTRACTS_LUMDETR_2024.pdf" target="_blank" >https://www.cfi.lu.lv/fileadmin/user_upload/lu_portal/projekti/cfi/Konferences/LUMDETR_2024/Abstracts/BOOK_OF_ABSTRACTS_LUMDETR_2024.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

0D defects in isostructural Zn-based single crystals

Popis výsledku v původním jazyce

One of the potentially possible applications of zinc oxide as well as caesium lead bromide is time-of-flight (TOF) positron emission tomography (PET). Therefore, the timing and light yield of a scintillating detector are very important. Strong excitonic luminescence with the decay time around 400-500 ps has been measured in ZnO nanoparticles. CsPbBr3 nanoparticles also have very fast (about 300 ps) and strong excitonic luminescence. A ZnO/CsPbBr3 core/shell heterostructure exhibited remarkable enhancement of photoluminescence intensity (17 times). This can be potentially applicable in the TOFPET scintillating detector. The factors influencing photophysics of luminescent materials are in most cases 0D defects (point defects) of different origin. To understand their influence on the ZnO/CsPbBr3 heterostructures, the ZnO substrate should be investigated first. Note, that the influence of the Zn- or O-face along the <0001> axis or the Zn and O mixture along the <1010> (or similar) axis on the X-ray induced 0D defects is not known in ZnO. Therefore, this is the aim of the present research. Moreover, to understand the role of oxygen, it was replaced by Se and Cr doping was applied.

Název v anglickém jazyce

0D defects in isostructural Zn-based single crystals

Popis výsledku anglicky

One of the potentially possible applications of zinc oxide as well as caesium lead bromide is time-of-flight (TOF) positron emission tomography (PET). Therefore, the timing and light yield of a scintillating detector are very important. Strong excitonic luminescence with the decay time around 400-500 ps has been measured in ZnO nanoparticles. CsPbBr3 nanoparticles also have very fast (about 300 ps) and strong excitonic luminescence. A ZnO/CsPbBr3 core/shell heterostructure exhibited remarkable enhancement of photoluminescence intensity (17 times). This can be potentially applicable in the TOFPET scintillating detector. The factors influencing photophysics of luminescent materials are in most cases 0D defects (point defects) of different origin. To understand their influence on the ZnO/CsPbBr3 heterostructures, the ZnO substrate should be investigated first. Note, that the influence of the Zn- or O-face along the <0001> axis or the Zn and O mixture along the <1010> (or similar) axis on the X-ray induced 0D defects is not known in ZnO. Therefore, this is the aim of the present research. Moreover, to understand the role of oxygen, it was replaced by Se and Cr doping was applied.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA24-12872S" target="_blank" >GA24-12872S: Pokročilá uzavřená nanokompozitní struktura CsPbBr3/ZnO/PS s účinnou odezvou na ionizující záření</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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