Energy transfer to luminescent impurity by thermally quenching excitons in CdWO4:Sm

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00538907" target="_blank" >RIV/68378271:_____/20:00538907 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jlumin.2020.117609" target="_blank" >https://doi.org/10.1016/j.jlumin.2020.117609</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jlumin.2020.117609" target="_blank" >10.1016/j.jlumin.2020.117609</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Energy transfer to luminescent impurity by thermally quenching excitons in CdWO4:Sm

Popis výsledku v původním jazyce

CdWO4:Sm single crystals were studied by different spectroscopies in the temperature range of 4–750 K. A hopping diffusion of self-trapped excitons and energy transfer to Sm3+ centres is demonstrated. The mechanism of energy transfer includes the formation of a Sm3+ bound exciton either by direct excitation or in the result of a thermally stimulated hopping diffusion of self-trapped excitons as well as a sequential trapping of charge carriers near the Sm3+ ions. The energy transfer from the perturbed excitons to Sm3+ ions is controlled by an electric dipole-dipole or exchange interaction and it is terminated in the temperature range of 450–650 K due to the thermal destruction of Sm3+-perturbed excitons. In the case of nearsurface excitations created in the energy region of high absorption coefficients by 5-eV photons, the Sm3+ emission is additionally quenched by surface-induced quenching centres.

Název v anglickém jazyce

Energy transfer to luminescent impurity by thermally quenching excitons in CdWO4:Sm

Popis výsledku anglicky

CdWO4:Sm single crystals were studied by different spectroscopies in the temperature range of 4–750 K. A hopping diffusion of self-trapped excitons and energy transfer to Sm3+ centres is demonstrated. The mechanism of energy transfer includes the formation of a Sm3+ bound exciton either by direct excitation or in the result of a thermally stimulated hopping diffusion of self-trapped excitons as well as a sequential trapping of charge carriers near the Sm3+ ions. The energy transfer from the perturbed excitons to Sm3+ ions is controlled by an electric dipole-dipole or exchange interaction and it is terminated in the temperature range of 450–650 K due to the thermal destruction of Sm3+-perturbed excitons. In the case of nearsurface excitations created in the energy region of high absorption coefficients by 5-eV photons, the Sm3+ emission is additionally quenched by surface-induced quenching centres.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Luminescence

ISSN

0022-2313

e-ISSN

—

Svazek periodika

228

Číslo periodika v rámci svazku

Dec

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000579805300005

EID výsledku v databázi Scopus

2-s2.0-85090021571