Solvo‐Thermal Synthesis and Characterization of Indium Selenide Nanocrystals

Abstract

Zinc‐blende‐type cubic InSe and β‐In2Se3 crystallites were synthesized using the solvo‐thermal method in this study. The crystalline structure, electronic and optical characterization of indium selenide particles were investigated using transmission electron microscopy (TEM), X‐ray diffractometer (XRD), UV–visible absorbance spectra. It was observed that the dominant crystalline structure of samples synthesized at 180°C for 1.5–48 h is zinc‐blende‐type cubic InSe phase with lattice parameter of about 0.573 nm. As the reaction temperature was raised to 200°C, the zinc‐blende‐type cubic InSe phase diminished and the β‐In2Se3 phase was produced. The zinc‐blende‐type cubic InSe phase band gap is about 1.68 eV. These synthesized compounds provide promising candidates for solar cell applications.