Synthesis and Characterization of Eu (1%) and Gd (0.1% to 2%) Doped LaPO4 Phosphors

  B. Vinod Kumar,  M. V. Basaveswara Rao,  T. Malathi Rekha

Cerium and Terbium doped LaPO4 Phosphor is a good commercial green emitting phosphor which was mostly used in display devices. The present paper reports the synthesis, photoluminescence and other characterizations like XRD, SEM and FTIR for LaPO4 : Eu (1%), Gd (0.1 to 2.0%) phosphor. The photoluminescence studies of the phosphor with Citric acid as a flux was also reported. LaPO4 phosphors doped with 1% of Europium and co-doped with Gadolinium with various concentrations from 0.1 to 2.0%, prepared under Standard Solid State Reaction [SSR] method at a calcinating temperature of 1200 o C for 3 hr was presented. Well indexed peaks at 589, 593, 613 and 621 nm are observed with very good intensity. The Orange Red wavelengths at 589 and 593 nm dominate the red emissions at 613 and 621nm. The peaks at orange region 589 and 593 nm are due to 5d0 → 7f1 transition and are due to electronic dipole of the electron. The red peak at 613 nm is due to 5d0 → 7f 2 transition and the peak at 621 nm is due to 5d4 → 7f 5 transition and are due to magnetic dipole of electron. All the emissions are allowed transitions of Europium. It is obvious from the data that, Gd as co-dopant is not able to resolve any new emissions; however, the intensities are increased with the increase of concentration of Gd from 0.1% to 2%.

Keywords- Solid State Reaction [SSR], Photoluminescence [PL], XRD, SEM, FTIR and Transitions

Unique Identification Number - IJEDR1704174
Page Number(s) - 1083-1089
Pubished in - Volume 5 | Issue 4 | December 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  B. Vinod Kumar,  M. V. Basaveswara Rao,  T. Malathi Rekha,   "Synthesis and Characterization of Eu (1%) and Gd (0.1% to 2%) Doped LaPO4 Phosphors", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 4, pp.1083-1089, December 2017, Available at :http://www.ijedr.org/papers/IJEDR1704174.pdf