Manipulation of brightness and decay kinetics of LuAG: Ce3+ and YAG: Ce3+ by simple metal oxides in polymeric matrices


Yildirim B., KESKİN Ö. Y., OĞUZLAR S., BİRLİK I., Azem F. A., ERTEKİN K.

OPTICS AND LASER TECHNOLOGY, vol.142, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 142
  • Publication Date: 2021
  • Doi Number: 10.1016/j.optlastec.2021.107226
  • Journal Name: OPTICS AND LASER TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: LuAG: Ce3+, YAG: Ce3+, Green phosphor, Yellow phosphor, Zinc oxide, Copper oxide, THERMAL-STABILITY, GARNET PHOSPHORS, LIGHT-EXTRACTION, LUMINESCENCE, COLOR, ENHANCEMENT, PERFORMANCE
  • Dokuz Eylül University Affiliated: Yes

Abstract

In this work, light-induced interactions among commercially available green and yellow garnets and wide range opto-emitters of ZnO and CuO have been investigated in terms of excitation, emission and decay kinetics. When the lutetium aluminum garnet (LuAG: Ce3+) is encapsulated along with the nanocrystalline metal oxides in a polymethylmethacrylate (PMMA) matrix, the absorption and emission efficiency of the phosphor enhanced 59-fold compared to its additive-free form. Similarly, when yttrium aluminum garnet (YAG: Ce3+) was incorporated with ZnO and ZnO-CuO nanoparticles, the composites exhibited 6- and 4-fold enhancement in the emission intensities, when excited by the blue light. In parallel to the emission intensities, the external quantum yield (EQY) of LuAG:Ce3+-ZnO-CuO enhanced from 88.4 to 116.4%, with respect to the additive-free-LuAG:Ce3+. Similarly, in YAG:Ce3+ based samples, the presence of the ZnO in the composite resulted in the enhancement of the EQE from 80.6 to 98.1.