Spectral and kinetic characterization of CaS:Pr3+ phosphor synthesized through chemical co-precipitation route and post annealing process

✍ Scribed by Shreyas S. Pitale; Suchinder K. Sharma; R.N. Dubey; M.S. Qureshi; M.M. Malik

• Book ID: 104075574
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 692 KB
• Volume: 32
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2009.10.010

✦ Synopsis

Synthesis of Pr 3+ doped CaS phosphor has been reported through chemical co-precipitation route and post annealing in the presence of NaCl, KCl and NH 4 Cl flux. Good crystallinity and cubic CaS phase is achieved after post-precipitation calcinations of powder at 900 °C for 1 h duration. Pseudo-spherical morphostructural features of micron-size particles are observed for phosphor prepared via chemical route. Phosphor samples are also prepared via solid-state carbothermal reduction technique for comparative studies and exhibit dendrite like structures. Prominent excitation bands at 276, 320 nm are observed for the present phosphor samples. The emission spectra show a duo-band feature at 495 and 580 nm where a spectral overlap of host lattice emission due to intrinsic defects and characteristic spectral features of Pr ion due to 3