Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F21%3A39918046" target="_blank" >RIV/00216275:25310/21:39918046 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/00216305:26620/21:PU141942
Výsledek na webu
<a href="https://pubs.rsc.org/en/content/articlelanding/2021/TC/D0TC04625F" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2021/TC/D0TC04625F</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d0tc04625f" target="_blank" >10.1039/d0tc04625f</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield
Popis výsledku v původním jazyce
The Pb substitution in quantum dots (PQDs) with lesser toxic metals has been widely searched to be environmentally friendly, and be of comparable or improved performance compared to the lead-perovskite. However, the chemical nature of the lead substitute influences the incorporation mechanism into PQDs, which has not been explored in depth. In this work, we analyzed Sr-doping-induced changes in FAPbI(3) perovskites by studying the optical, structural properties and chemical environment of FAPb(1-x)Sr(x)I(3) PQDs. The substitution of Pb by 7 at% Sr allows us to achieve FAPb(1-x)Sr(x)I(3) PQDs with 100% PLQY, high stability for 8 months under a relative humidity of 40-50%, and T-80 = 6.5 months, one of the highest values reported for halide PQDs under air ambient conditions. FAPb(0.93)Sr(0.07)I(3) PQDs also exhibit photobrightening under UV illumination for 12 h, recovering 100% PLQY at 15 days after synthesis. The suppression of structural defects mediated by Sr-doping decreases the non-radiative recombination mechanism. By attempting to increase the Sr content in PQDs, a mixture of 2D nanoplatelets/3D nanocubes has emerged, caused by a high Pb deficiency during the FAPb(1-x)Sr(x)I(3) synthesis. This contribution gives a novel insight to understand how the suitable/poor Pb substitution achieved through Sr-doping dictates the photophysical properties of PQDs that may be potentially applicable in optoelectronics.
Název v anglickém jazyce
Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield
Popis výsledku anglicky
The Pb substitution in quantum dots (PQDs) with lesser toxic metals has been widely searched to be environmentally friendly, and be of comparable or improved performance compared to the lead-perovskite. However, the chemical nature of the lead substitute influences the incorporation mechanism into PQDs, which has not been explored in depth. In this work, we analyzed Sr-doping-induced changes in FAPbI(3) perovskites by studying the optical, structural properties and chemical environment of FAPb(1-x)Sr(x)I(3) PQDs. The substitution of Pb by 7 at% Sr allows us to achieve FAPb(1-x)Sr(x)I(3) PQDs with 100% PLQY, high stability for 8 months under a relative humidity of 40-50%, and T-80 = 6.5 months, one of the highest values reported for halide PQDs under air ambient conditions. FAPb(0.93)Sr(0.07)I(3) PQDs also exhibit photobrightening under UV illumination for 12 h, recovering 100% PLQY at 15 days after synthesis. The suppression of structural defects mediated by Sr-doping decreases the non-radiative recombination mechanism. By attempting to increase the Sr content in PQDs, a mixture of 2D nanoplatelets/3D nanocubes has emerged, caused by a high Pb deficiency during the FAPb(1-x)Sr(x)I(3) synthesis. This contribution gives a novel insight to understand how the suitable/poor Pb substitution achieved through Sr-doping dictates the photophysical properties of PQDs that may be potentially applicable in optoelectronics.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
21001 - Nano-materials (production and properties)
Návaznosti výsledku
Projekt
<a href="/cs/project/LM2018103" target="_blank" >LM2018103: Výzkumná infrastruktura CEMNAT</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2021
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Materials Chemistry C
ISSN
2050-7526
e-ISSN
2050-7534
Svazek periodika
9
Číslo periodika v rámci svazku
5
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
12
Strana od-do
1555-1566
Kód UT WoS článku
000618050600004
EID výsledku v databázi Scopus
2-s2.0-85100856574