Investigation of light induced interactions between ZnO nano-particles and red emitting phosphor blends of Eu2+/Dy3+ doped strontium aluminate and Eu2+ doped Ca-alpha-Sialon

Oğuzlar S., Zeyrek Ongun M., Ertekin K.

JOURNAL OF LUMINESCENCE, cilt.238, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 238
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.jlumin.2021.118236
  • Dergi Adı: JOURNAL OF LUMINESCENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Chemical Abstracts Core, Communication Abstracts, INSPEC
  • Anahtar Kelimeler: SrAl2O4:Eu2+,Dy3+, Ca-alpha-SiAlON:Eu2+, Phosphor, ZnO nano-Particle, White LED, Luminescence, LUMINESCENCE PROPERTIES, CRYSTAL-STRUCTURE, ENERGY-TRANSFER, PHOTOLUMINESCENCE, MECHANISMS, SR
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Up to now, luminescence properties of the Eu2+ doped strontium aluminates and Ca-alpha-Sialons have been widely studied, individually. Herein we investigated excitation and emission based spectral properties of the phosphorblends comprising SrAl2O4:Eu2+,Dy3+, Ca-alpha-SiAlON:Eu2+ and ZnO nanoparticles in a polymethylmethacrylate (PMMA) matrix into detail. The emission bandwidth of the Ca-alpha-SiAlON expanded from 250 nm to 300 nm when used in the form of phosphor blend along with the strontium aluminate. Addition of nano-scale zinc oxide into the phosphorus blend resulted in 56% enhancement in the emission intensity and 24 nm of additional red-shift with respect to its ZnO-free form. Luminescence and decay characteristics of the phosphors were also investigated in nanosecond and microsecond time scales. The proposed material may bring a new inside for the existing problems of the red phosphors regarding the brightness, color correlation temperature, and color rendering index.