Comparative Study of BCNO-CNT and BCNO-Mesoporous Silicon dioxide
Meenakshi Rajpurohit, Jyoti Bamne, Rajesh Purohit, and Fozia Z. Haque
Department of Physics, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, India
Generally, the materials used for luminescence contain rare earth particles. Boron carbon oxynitride (BCNO) phosphor is a rare earth-free material and has excellent optical and electrical properties. When exposed to UV excitation at 365 nm, the BCNO phosphor material produces luminescence with a wide range of wavelengths (from violet to near red). which can be achieved by varying the percentage of carbon and silicon content. In addition, these rare-earth free materials are relatively expensive. To enhance its luminescence property, BCNO is doped with Multiwalled carbon nanotube (MWCNT) and Mesoporous silicon dioxide nanoparticles (MSNPs). They exhibit extraordinary strength, unique optical & electrical properties and are efficient conductors of heat. We have produced BCNO phosphor nanoparticles having 5 nm as diameters, and their PL peaks are in the 440–528 nm range. We have also used mesoporous SiO2 nanoparticles as an additive matrix, resulting in a uniform and relatively high yellow luminescence intensities. During the synthesis of BCNO 1wt% to 6wt% CNT and B, C, and N sources is added before the combustion process. XRD and FT-IR characterization is performed to confirm the crystal structure of BCNO-MWCNT and BCNO-Mesoporous Silicon dioxide nanomaterials (MSNPs). UV-Vis spectroscopy is performed to study the absorbance/transmittance properties for bandgap analysis. Photoluminescence (PL) characterization is performed to study the luminescence property and Scanning Electron Microscopy (SEM) investigate surface morphology, grain size and orientation of the produced MWCNT and Mesoporous Silicon dioxide doped BCNO Phosphor nanoparticles.
Keywords: BCNO phosphor, MWCNT, Mesoporous Silicon Dioxide Nanoparticles, Morphology, Optical and Electrical Properties.