Loading…

Improved stability and luminescent efficiency of AgInSe 2 nanocrystals by shelling with ZnS

In this paper, AgInSe 2 (AISe) core and AgInSe 2 /ZnS (AISe/ZnS) core/shell nanocrystals (NCs) were synthesised by a one-pot method in an organic solvent. Firstly, the synthesis of AIS core NCs with different sizes was performed by hot-injection of Se precursor into the Ag and In complexes at differ...

Full description

Saved in:
Bibliographic Details
Published in:Advances in natural sciences. Nanoscience and nanotechnology 2023-06, Vol.14 (2), p.25017
Main Authors: Thi Thu Huong, Tran, Thi Hiep, Nguyen, Loan, Nguyen Thu, Van Long, Le, Han, HyukSu, Thi Thao, Nguyen, Thi Dieu Thuy, Ung, Liem, Nguyen Quang
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, AgInSe 2 (AISe) core and AgInSe 2 /ZnS (AISe/ZnS) core/shell nanocrystals (NCs) were synthesised by a one-pot method in an organic solvent. Firstly, the synthesis of AIS core NCs with different sizes was performed by hot-injection of Se precursor into the Ag and In complexes at different temperatures from 100 °C to 180 °C for a reaction time of 20 min Then, the ZnS was grown on the surface of AISe NCs at 150 °C for 60 min to produce the AISe/ZnS core/shell structures. The as-synthesised AISe core and AISe/ZnS core/shell NCs were characterised by using x-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and optical spectroscopies (UV–vis absorption and photoluminescence (PL)). After shelling ZnS layer, AISe/ZnS core/shell NCs become more stable (12 months) in ambient air and emit strong luminescence with a high quantum yield (QY) of 40% in the range from 610 nm to 762 nm by varying the reaction temperature of AISe core synthesis from 100 °C to 180 °C. The observed increase of QY and blue-shift in photoluminescence spectra after coating ZnS on surface AISe core NCs are rationalised by the formation of the alloyed structure and passivation of surface states. With their outstanding luminescent properties, AISe core and AISe/ZnS core/shell NCs are very promising in designing emitters for solid-state lighting sources in the greenhouse and in-door farming and bio-related devices.
ISSN:2043-6262
2043-6262
DOI:10.1088/2043-6262/acd92a