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Fracto-mechanoluminescence in Mn/Cu doped ZnS induced by steel ball and cylindrical piston
摘要： Herein, we present a comparison of fracto-mechanoluminescence (FML) from ZnS: Mn and ZnS:Cu phosphors prepared by solid state reaction (SSR) route. The FML emitted by two phosphors was compared in terms of its dependence on time and velocity. The FML intensity initially increases with time attains a peak value followed by decrease at still longer times. Peak ML intensities in both the cases are found to linearly increase with impact velocity and total ML intensity linearly increases with mass of the phosphor samples. ML and photoluminescence (PL) spectra of ZnS: Mn and ZnS: Cu phosphors are recorded to lie at 540 nm and 580 nm, respectively.
关键词： Sensor,ZnS: Cu,ZnS: Mn,Mechanoluminescence,Phosphors
更新于2025-11-21 11:18:25
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Emission of dispersed-type inorganic EL devices with frequency-variable high-voltage oscillation circuit
摘要： Dispersed‐type inorganic electroluminescent (EL) devices composed of a transparent electrode, a phosphor, a dielectric, and a back electrode were prepared under various conditions using a zinc sulfide (ZnS)‐based phosphor. Additionally, a voltage/frequency variable circuit was designed. A compact high‐voltage/frequency variable circuit including three modules for boosting, frequency conversion, and voltage conversion was designed. A 140 Vpp voltage and a frequency in the range of 270 Hz to 2.4 kHz can be controlled by this circuit. The emission has begun to be observed at a voltage about 60 Vpp and a frequency of 400 Hz, at a voltage about 40 Vpp and a frequency of 1.4 kHz, 2.4 kHz, respectively. The emission intensity increased with an increase in frequency; emission with a wavelength of 450 nm was strongly influenced by the frequency. The luminescence and the electrical properties were affected by the preparation conditions including device structures, dispersion of ZnS:Cu, and Cl particles because of the current path generated by defects in the EL cell.
关键词： inorganic,organic dye,electroluminescence,ZnS:Cu,Cl,oscillation circuit,driver circuit
更新于2025-09-23 15:22:29