Search

This paper describes a unique method that uses Iron (phen) molecule [phen: 1,10-phenanthroline] placed on a glass substrate to create a photodetector (PD) that is sensitive to visible light as a heterostructure device. The structural, morphological, and optical properties of the samples were investigated using techniques such as X-ray diffraction (XRD), energy dispersive X-ray spectra (EDX), field emission scanning electron microscopy (FESEM), and UV-Vis spectrophotometry. The photosensitivity of the Iron (phen) /glass PD was evaluated at different bias voltages (5, 10, 15, and 20 V) at wavelength of 510 nm. The photosensitivity values were found to be 58.45, 76.82, 84.9, and 87.83, indicating the PD's ability to generate a measurable electrical response to light stimuli in the visible range. Furthermore, the response and recovery times of the Iron (phen) PD were assessed when exposed to pulsed visible light at a wavelength of 510 nm and bias voltages of 5, 10, 15 and 20 V. The results indicated favorable response and recovery times, suggesting the PD's capability to quickly detect and recover from changes in light intensity. At a bias voltage of 20 V and under illumination with visible light at 510 nm, the Iron (phen) PD demonstrated a maximum current gain of 9.22 and a quantum efficiency (ƞ) of 28.17. These values indicate the PD's ability to amplify the generated electrical current and efficiently convert incident photons into detectable electrical signals. Overall, the fabricated Iron (phen) glass PD exhibited promising photosensitivity, response and recovery times, current gain, and quantum efficiency when exposed to visible light. The findings suggest the potential application of Iron (phen) as a material for visible light photodetection.

A novel series of organic tellurium compounds based on pyrazole derivatives with a general formula of ArTeBr3 and Ar2TeBr2 [Ar = 2-(3-(4-substituted phenyl)-5-(2-chlorophenyl)-1H-pyrazol-1-yl)-3,5-dinitrophenyl] were obtained by the refluxing of corresponding aryl mercuric chlorides with TeBr4 in two different mole ratio of 1:1 and 2:1, respectively, in free-moisture dioxane solvent under an argon atmosphere. Compounds of ArTeBr3 and Ar2TeBr2 were reduced by the action of ethanolic solution of hydrazine hydrate obtained Ar2Te2 and Ar2Te, respectively. Reaction of Ar2Te2 with excess thionyl chloride or iodine gave the corresponding trihalides ArTeCl3 and ArTeI3, respectively while the reaction of Ar2Te with thionyl chloride or iodine gave the corresponding Ar2TeCl3 and Ar2TeI3, respectively. The structures were elucidated according to their elemental analysis of carbon, hydrogen and nitrogen (CHN) and some of the spectroscopic techniques such as infrared IR and nuclear magnetic resonance for 1H and 13C. The antimicrobial activity for all the synthetic compounds were assayed against both Gram-negative and Gram-positive bacteria by using the agar diffusion method. The tellurated pyrazole derivatives showed a good degree against bacteria growth. In some cases, the antimicrobial activities of the synthetic compounds were better than amoxicillin.