Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield
The result's identifiers
Result code in 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>
Alternative codes found
RIV/00216305:26620/21:PU141942
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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)
Result continuities
Project
<a href="/en/project/LM2018103" target="_blank" >LM2018103: Center of Materials and Nanotechnologies - Research Infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Chemistry C
ISSN
2050-7526
e-ISSN
2050-7534
Volume of the periodical
9
Issue of the periodical within the volume
5
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
1555-1566
UT code for WoS article
000618050600004
EID of the result in the Scopus database
2-s2.0-85100856574