The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol-Dispersed CsPbX<sub>3</sub> Nanocrystals and on the Stability Enhancement in Light-Emitting Applications
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU152215" target="_blank" >RIV/00216305:26620/24:PU152215 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/adom.202401475" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/adom.202401475</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/adom.202401475" target="_blank" >10.1002/adom.202401475</a>
Alternative languages
Result language
angličtina
Original language name
The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol-Dispersed CsPbX<sub>3</sub> Nanocrystals and on the Stability Enhancement in Light-Emitting Applications
Original language description
The ligand passivation is considered an attractive strategy to prepare high-quality perovskite nanocrystals (PNCs) with improved photophysical features in polar media. However, the long-term stabilization of PNCs in these environments is still challenging, being pivotal to understanding the protection mechanism given by prominent surface ligands and avoiding material deterioration in polar solvents. In this work, how the nature of diverse alkylammonium bromides used during surface passivation influences the photophysical properties and quality of CsPbX3 PNCs fully dispersed in alcohol environments, exhibiting stability up to 10 months are investigated. By adding didodecyldimethylammonium benzyldodecyldimethylammonium and tetrabutylammonium bromides (DDAB, BDAB, and TBAB, respectively), DDAB and BDAB promote a suitable and partial surface coverage are observed, respectively, suppressing defect sites in the nanocrystals. Conversely, TBAB shows poor surface protection, decreasing the PL features of PNCs. The presence of DDAB and BDAB favors the fabrication of color converters, and efficient light-emitting diodes (LEDs) with external quantum efficiencies (EQE) of approximate to 23%. Interestingly, significant device stability with BDAB capping shows an LED half-life of 20-fold longer than for DDAB. This contribution offers a promising approach for preparing highly luminescent and stable alcohol-dispersed PNCs, useful for fabricating efficient optoelectronic devices.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20500 - Materials engineering
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Optical Materials
ISSN
2195-1071
e-ISSN
—
Volume of the periodical
12
Issue of the periodical within the volume
31
Country of publishing house
DE - GERMANY
Number of pages
12
Pages from-to
„“-„“
UT code for WoS article
001303991400001
EID of the result in the Scopus database
2-s2.0-85202749033