Enhanced photodetectivity and responsivity in In <sub>10</sub> Se <sub>70</sub> Te <sub>15</sub> Bi <sub>5</sub> film by time-dependent laser irradiation for photodetector applications
Sunil Giri, Prabhukrupa Chinmay Kumar, S. Supriya, D. Alagarasan, Ramakanta Naik
Abstract
Jones upon 60 min laser annealing. The particle size reduction is also evident from FESEM images upon laser treatment. The elemental presence is also confirmed from the EDS analysis, along with the XPS core level peaks, which also present the chemical analysis of the films. The laser-induced surface changes affect the surface wettability in terms of a decrease in contact angle, thus increasing the hydrophilicity. The increased refractive index upon laser treatment enhanced the nonlinear values in terms of susceptibility and refractive index. At the same time, the dielectric constant is enhanced by reducing the optical electronegativity through laser illumination. The reduction in transmission resulted in an increased absorbance, which resulted in the enhancement of optical density and reduction in skin depth. The optical quantities, along with the photo response parameters, are useful for visible light photodetectors.