Properties of Thallium Disulfide Crystals as a Promising Photoconductor: Experimental Study

  • G.A.Gamal, E.A.Ahmed, Saad M. Abedrahman, M.M.Kahlid


In the present work the photoconductivity (PC) of the unique thallium disulfide single crystals is studied for the first time. The ac-photoconductivity (ac-PC) and the dc-photoconductivity (dc-PC) are investigated for the grown crystals. The crystals show a high sensitivity for the ambient conditions. Hence, the ac-PC and the dc-PC results with the derived charge carriers' lifetime are obtained at different light intensities and applied voltages. Results are done by exposing the sample to different light intensities (150, 300, 450, 1000 and 1500 Lux) and at different bias voltages (40, 50, 60, 70 and 80 volts). Effect of carrier lifetime on both the light intensity and applied voltage are investigated as well as the spectral distribution from the dc-PC measurement data.

Keywords: T1S2, crystal growth, photoconductivity, lifetime, light intensities and bias voltages.