Inventor: Assist. Prof. Dr. Samar Younis Taha/Department of Physics, College of Science for Women, University of Baghdad
Assist. Prof. Dr. Kazem Abdul Wahid Adham/Department of Physics, College of Science, University of Baghdad
Abstract
The objective of the work is to manufacture a UV light detector and room temperature using titanium oxide, pure zinc oxide and titanium oxide, which is supplied with different types of zinc oxide (2%, 5%, 7%) and porous silicon (PSi) After thinning (500 ° C), thin films of TiO2, ZnO, and TiO2: ZnO were deposited at a different rate (2%, 5% and 7%) on Psychedelic Laser Pulsed Laser Deposition (PLD) And then vaporizing the aluminum electrodes above it. The detector was lighted using an ultraviolet (UV) laser with a wavelength of 385 nm and a capacity of 2.5 mW. The structural, topographic, and optical properties of the membrane were studied after deposition on glass bases. To study the structural properties, the membrane was examined using x-ray diffraction and the membrane was found to have a polycrystalline structure in the rotational phase. The surface topography of the membrane was examined to determine the size of the nanoparticles using an atomic force microscope (AFM). The images showed the homogeneous distribution of the thin films on the glass substrates and the membrane free of cracking and aggregation. The optical absorption of the membrane was measured using the UV-VIS spectrometer.
The material was found to have a good absorption in the geophysical region and the vicinity of the visible area, making it a good choice for ultraviolet radiation applications. Hall effect measurements showed that thin films deposited on glass bases were a negative type of n-type and had a conductivity of up to 6.891 to 110-1 (1 / cm). The reagent was connected to the special circuit to operate the detector and to study the properties of the current-voltage at the front bias voltage between 0.1-1.6 volts. The characteristics of the detector were examined (Rλ, efficiency η, NEP and D *). Response and photoreceptor properties were improved by emitting at 500 ° C for three hours. Reagent properties were calculated before and after the process. The results showed that the response speed and quantitative and detection efficiency of UV detectors improved as response increased after increasing the concentration of zinc oxide.As well as increased after the birth of 3.39 (amp / watt) to reach 3.82 (Amp / w) at the concentration of 7%, as well as the qualitative scabies increased 1099.21 (cm.hertz 1/2 / W) while the quantitative efficiency increased´from 8.17 to109 (cm.hertz 1/2 / w).
The reagent was connected to the electrical circuit to operate the detector and the water temperature at the voltage (0.1-1.6) volt. The properties of the detector (reaction Rλ, efficiency of η, NEP and D) were studied. The temperature is 500 ° C and for three hours. The characteristics of the reagent before the completion of the development process of rescue 7% in addition to the qualitative scaffolding from 8.17 to109 (cm.hertz 1/2 / w) to 991099.21 (cm.hertz 1/2 / w) while the quantitative efficiency of To 12.3. These values provide proof of impact.