Surfactant assisted synthesis of nanocrystalline n-Bi2Se3 thin films at room temperature via arrested precipitation technique
Year: 2016
Type: article
Abstract: In the present investigation, we have successfully synthesized nanocrystalline bismuth selenide (Bi 2 Se 3 ) thin films using an arrested precipitation technique at room temperature.The optostructural, morphological, compositional and photoeletrochemical properties were studied for Bi 2 Se 3 thin films prepared via surfactant-assisted synthesis.The optical study reveals the presence of direct allowed transition with band gap energy ranging from 1.40-1.80eV.The X-ray diffraction (XRD) pattern confirms rhombohedral crystal structure.Scanning electron microscopy study shows the morphological transition from an interconnected mesh to nanosphere-like morphology and finally, lamellar sphere.Atomic force microscopy (AFM) study carried out to determine surface roughness and surface topography of thin films.Energy dispersive spectroscopy (EDS) analysis reveals the presence and ratio of elemental bismuth and selenium.Finally, the photoelectrochemical (PEC) performance of all the as-synthesized thin films were carried out using iodide-polyiodide redox couple.
Institution: Shivaji University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2512724202