Cd-free photoluminescent composites based on the ternary chalcogenides quantum dots

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10472980" target="_blank" >RIV/00216208:11320/23:10472980 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=KExCVAz5P" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=KExCVAz5P</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.optmat.2023.114208" target="_blank" >10.1016/j.optmat.2023.114208</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cd-free photoluminescent composites based on the ternary chalcogenides quantum dots

Popis výsledku v původním jazyce

Ternary chalcogenides quantum dots (QDs) are attractive light-converting materials owing to the absence of highly toxic metals (Cd), which are present in currently used QDs. Besides environmental friendliness, they possess broad, composition-tunable emission peaks with long photoluminescence lifetime, in a wide spectral range, which enables their usage as down-converting luminophors for light-emitting devices. Albeit, to improve QDs stability against the environment, as well as to widen an area of their possible applications, solid-state composites with incorporated QDs are preferable. AgInS(2) QDs are one of the most prominent members of ternary chalcogenides, which can be synthesized easily. Thus, pristine QDs and QDs with ZnS shell were synthesized and embedded into the CaCO(3) matrix. Copper doping can significantly expand the spectral window of AgInS(2) QDs to red and NIR regions. Thus we researched Cu alloying with pristine AgInS(2) quantum dots by the same means. The impact of the encapsulation on QDs optical properties was investigated using photoluminescence (PL) spectroscopy at ambient and cryogenic temperatures. We observed that QDs-matrix composites show PL in a broad spectral range (550-730 nm). Overall the CaCO(3) matrix maintains original PL of incorporated QDs. Insignificant red shifts of PL peaks, especially in the case of Cu-containing QDs are probably caused by the interaction with CaCO(3) material. During cryogenic PL measurements (10-300 K) we revealed that generally Cu alloying dramatically suppress AgInS(2) QDs thermosensitivity. Copper doping of AgInS(2) QDs increases their photostability by trapping of charge carriers at Cu clusters.

Název v anglickém jazyce

Cd-free photoluminescent composites based on the ternary chalcogenides quantum dots

Popis výsledku anglicky

Ternary chalcogenides quantum dots (QDs) are attractive light-converting materials owing to the absence of highly toxic metals (Cd), which are present in currently used QDs. Besides environmental friendliness, they possess broad, composition-tunable emission peaks with long photoluminescence lifetime, in a wide spectral range, which enables their usage as down-converting luminophors for light-emitting devices. Albeit, to improve QDs stability against the environment, as well as to widen an area of their possible applications, solid-state composites with incorporated QDs are preferable. AgInS(2) QDs are one of the most prominent members of ternary chalcogenides, which can be synthesized easily. Thus, pristine QDs and QDs with ZnS shell were synthesized and embedded into the CaCO(3) matrix. Copper doping can significantly expand the spectral window of AgInS(2) QDs to red and NIR regions. Thus we researched Cu alloying with pristine AgInS(2) quantum dots by the same means. The impact of the encapsulation on QDs optical properties was investigated using photoluminescence (PL) spectroscopy at ambient and cryogenic temperatures. We observed that QDs-matrix composites show PL in a broad spectral range (550-730 nm). Overall the CaCO(3) matrix maintains original PL of incorporated QDs. Insignificant red shifts of PL peaks, especially in the case of Cu-containing QDs are probably caused by the interaction with CaCO(3) material. During cryogenic PL measurements (10-300 K) we revealed that generally Cu alloying dramatically suppress AgInS(2) QDs thermosensitivity. Copper doping of AgInS(2) QDs increases their photostability by trapping of charge carriers at Cu clusters.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Optical Materials

ISSN

0925-3467

e-ISSN

1873-1252

Svazek periodika

143

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

114208

Kód UT WoS článku

001054123700001

EID výsledku v databázi Scopus

2-s2.0-85166482667