Special Features of the Optical Absorption and Photoconductivity of Indium Monoselenide Upon Laser Excitation

The successive ionic layer adsorption and reaction (SILAR) method is used to prepare InSe thin films and InSe nanoparticles. Shapes and sizes of the obtained nanoparticles are investigated using a scanning electron microscope and an atomic force microscope. The main parameters of the examined structures, nanoparticle sizes (4–20 nm), and band gap ( Е g = 1.60 eV) for nanoparticles with the least sizes are determined. Superfast (1.5·10 -8 s) photocurrent relaxation and stimulated emission with line half-width of 8 Å have been observed upon exposure to laser radiation.