Abstract:
Zinc selenide-based Core-Shell QDs are generating many recognitions because of its
ability in many applications such as optoelectronic and display devices. Similarly, Bismuth
chalcogenides Bi2X3(X= S, Se, Te) are a class of unique material that are widely used for
optoelectronic applications due to optical, electrical properties and eco-friendly
composition. In this work Novel ZnSe/ Bi2X3(X= S, Se, Te) based quantum dots of core
and shell were manufactured via facile two step method of hot injection. The structural,
optical and electronic properties are analyzed by UV-Visible, XRD, Raman and
Photoluminescence spectroscopy. The core (ZnSe) and shell modes Bi2X3 (X= S, Se, Te)
vibrational modes properties are displayed in the Raman spectroscopy data. data.
ZnSe/Bi2Se3 has 1.7% lattice mismatch, ZnSe/Bi2Se3 has 31.9%, and ZnSe/Bi2Te3 has
15%, according to X-ray diffraction data.The ZnSe/Bi2S3, ZnSe/Bi2Se3, and ZnSe/Bi2Te3
thicknesses as seen by XRD are 10.8, 1.54, and 3.49nm, respectively. The average size of
a ZnSe particle is 41.37 nm, while the core-shell particles of ZnSe/Bi2S3, ZnSe/Bi2Se3, and
ZnSe/Bi2Te3 are 9.8, 4.7, and 8.4 nm, in that order. XRD is used to measure these
computations theoretically. Due to its greatest thickness and minimal lattice misfit,
ZnSe/Bi2S3 is discovered to have a wide photoluminescence spectrum, which indicates that
its photoluminescence intensity has grown and covered all structural faults. Thus, I found
that ZnSe/Bi2S3 is the most appropriate material for Core-Shell QDs out of the three
bismuth chalcogenides ZnSe/Bi2X3 (X= S, Se, Te).
