Sol-Gel Synthesis and Photoluminescent Investigation of SrZnV2O7:Eu3+ Nanophosphors

Abstract

Sol-gel Synthesis and Photoluminescent Investigation of SrZnV2O7:Eu3+ Nanophosphors S.P. Khatkar1*, V.B. Taxak1, Mandeep Dalal1 1Department of Chemistry, Maharshi Dayanand University, Rohtak -124001, India *Corresponding Author: Tel: +919813805666 E-mail: s_khatkar@rediffmail.comRecently, opto-electronic study of rare earth doped inorganic host materials emerged out as one of the most proficient field in nanotechnology. White LEDs exhibit excellent advantages such as more economical power consumption, longer life, being mercury-free and less pollution as compared to the conventional halogen and incandescent lamp. However, white LEDs using GaN based chip system have poor color rendering index and low chromatic stability under different driving currents. Therefore, near UV-LEDs coated with RGB phosphor offer effective and attractive solution for the problem of white light emission with lower color temperature. In present work, europium doped SrZnV2O7 nanophosphor was successfully synthesized via sol-gel approach in nano range with particle size in 70-90 nm range confirmed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The crystallinity of pure phased nanophosphor in monoclinic lattice with the P121/n1 (14) space group was confirmed through X-ray diffraction analysis. The nanophosphor yields strong red emission at 616 nm attributed to 5D0→ 7F2 transition of Eu3+ ion when excited at 395 nm with optimum concentration for maximum luminescence was 4 mol%. The photoluminescent excitation and emission spectra of synthesized samples suggest their potential application in phosphor converted white LEDs with NUV excitation.