Browsing by Author "LHR TP 6358"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Plasmonic interactions of silver nanoparticles with quantum dots embedded in borophosphate amorphous matrix: A photoluminescence study
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2020) Muhammad Zeshan Haider; CIIT/FA18-RPH-013/LHR; Dr. Junaid Amjad; LHR TP 6358
    We studied the photonic characteristics of Cadmium sulfide (CdS) with boro-phosphate glass. We prepared samples having composition 5% [P2O5]—70% [B2O3]—25% [Na2O2] 1% [CdS] by varying amount of AgCl. We mixed CdS with phosphate to prepare glasses by highly recommended melt-quenching method. Their physical, conductive, structural, chemical and photonic characteristics are recorded. The effect of CdS doping on emission spectra (up-conversion or down-conversion) and lifetimes (over all behavior) was investigated. Samples were polished, passed through finishing process and crushed into powder for characterization i.e., UV visible, XRD, Raman spectroscopy photoluminescence spectrum PL& FTIR spectroscopy. The optical band gap energy direct and indirect allowed transitions. Density was measured by Archimedes method, which directly correlated SPR and LSPR. The irregular shapes of atoms of the glass samples were recorded from the X-ray diffraction pattern. The emission spectrum and other optical properties were recorded using photoluminescence characterization. The fluorescence spectra of CdS exhibit emission transition of excitation wavelengths by giving emission of green and red lights. When material is excited with 514nm light source it gives rise to down conversion from green light (514nm) to yellowish green (~530nm) &red light (~650nm). Down conversion of Green visible into both yellowish green &Red visible radiation could use in no of sundry applications in such as solid-state lasers, LED/LCD displays, optical fibers, and fast