Robust dual cationic ligand for stable and efficient warm-white light emission in lead-free double perovskite nanocrystals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F22%3A10249490" target="_blank" >RIV/61989100:27640/22:10249490 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15640/22:73618703
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2352940721003516" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352940721003516</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apmt.2021.101288" target="_blank" >10.1016/j.apmt.2021.101288</a>
Alternative languages
Result language
angličtina
Original language name
Robust dual cationic ligand for stable and efficient warm-white light emission in lead-free double perovskite nanocrystals
Original language description
Bismuth-doped alloyed Cs2Ag1-xNaxInCl6 double perovskite nanocrystals (DP NCs) emerged as a new class of lead-free alternative for single-emitter-based solution-processed white-light-emitting devices (WLEDs). However, their thin-film processing and device fabrication have been limited due to low photoluminescence (PL) quantum yield (QY) and degradation during purification from the as-synthesized crude solution. Moreover, easy reduction of a silver ions by oleylamine also raised concern regarding stability issues of silver based DP NCs. Here, we report a facile synthesis and purification method for shape-pure and monodispersed bismuth-doped alloyed Cs2Ag1-xNaxInCl6 DP NCs with high PL QY and long-term stability. At optimized bismuth-doping, alloyed Cs2Ag0.4Na0.6InCl6 DP NCs showed warm white-light-emission with a PL QY of 40% due to suppressed non-radiative recombination. The synthesis of highly emissive and stable DP NCs was achieved by utilizing a combination of strongly coordinating silver-trioctylphosphine (Ag-TOP) complex along with additional TOP ligand. The Ag-TOP complex served as a highly reactive silver precursor and prevented the reduction of silver ions into metallic silver. While TOP facilitated the nucleophilic reaction with benzoyl chloride during nucleation and growth stage and forms benzoyl trioctylphosphonium chloride intermediate that served as both halide source and surface capping ligand which enabled the formation of high-quality DP NCs. The high tolerance of DP NCs against common antisolvents such as methyl acetate and isopropanol was attributed to the tight binding of dual cationic ligand benzoyl trioctylphosphonium and oleylammonium cations together with oleate anion to the surface of DP NCs. (C) 2021
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
20500 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Materials Today
ISSN
2352-9407
e-ISSN
2352-9407
Volume of the periodical
26
Issue of the periodical within the volume
March
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
13
Pages from-to
nestrankovano
UT code for WoS article
000793279400003
EID of the result in the Scopus database
2-s2.0-85120898968