Structural, morphological, and optical characterization of indium selenide (In 2 Se 3 ) obtained by mechanical alloying
Year: 2024
Type: article
Abstract: The optical, electrical, and thermal properties of indium selenides are strongly influenced by their crystal structure. At room temperature (RT), the indium selenide with the stoichiometry In 2 Se 2 exhibits two coexisting crystalline phases namely α and β , both can crystallize in two different crystal structures, hexagonal (2H) and rhombohedral (3 R). In polycrystalline In 2 Se 3 powders, the presence of both phases has been observed. In this study, the rhombohedral β (3 R) phase of In 2 Se 3 was synthesized by prior mechanical pulverization of powders of selenium and beads of indium, followed by mechanical alloying, achieved after 30 h of milling, and identified by x-ray diffraction (XRD). Scanning electron microscopy (SEM) revealed a morphological evolution with a predominance of agglomerates smaller than 500 nm. Photoluminescence (PL) spectra show an emission of around 1.26 eV, lower than that reported in the literature, and the optic band gap energy E g , determined by transmission spectra and the Tauc method, was 1.23 eV, a value not previously reported for this phase.
Source: Materials Research Express
Authors: Josue Fernando Teoyotl Sosa, José Álvaro David Hernández de la Luz, Osvaldo López Hernández, Gabriel Juárez Diaz, Primavera López Salazar
Institution: Benemérita Universidad Autónoma de Puebla
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,880
Award: G1753152895
OpenAlex ID: W4405588753