ZnO nanoparticles and rare earth-doped oxides as phosphors for application in white light emitting diodes and other light emitters

Aleksandra Apostoluk (1) , Yu Zhang (1) , Aleksandra Sosna-Glebska (2) , Thibaut Cornier (3) , S. Daniele (3) , Katarzyna Znajdek (2) , Natalia Szczecińska (2) , Maciej Sibiński (2) , Bruno Masenelli (1)

1 INL - S&N - INL - Spectroscopies et Nanomatériaux
2 Łódź University of Technology
3 CDURABLE - IRCELYON-C'Durable

We demonstrate white light emission from rare earth (RE)-free ZnO nanopowders and layers (undoped or doped with semiconducting and metallic ions) and RE–doped oxides (SrAl2O4:Eu,Dy and Sr4Al14O25:Eu,Dy) for comparison. The RE-free ZnO-based nanopowders and RE-based oxides exhibit white light emission, maintaining a high value of photoluminescent quantum efficiency (PL QE). It is noteworthy that the high PL QE value is obtained for a material without RE and that the broad light emission can be tuned by or the amount or valence of the incorporated metallic ion. We propose the use of these phosphors in a novel organic-inorganic white-light-emitting device in combination with a solid state UV light-emitting source.

Domaines: Sciences de l'ingénieur [physics]; Matériaux; Micro et nanotechnologies/Microélectronique; Optique / photonique

Aleksandra Apostoluk, Yu Zhang, Aleksandra Sosna-Glebska, Thibaut Cornier, S. Daniele, et al.. ZnO nanoparticles and rare earth-doped oxides as phosphors for application in white light emitting diodes and other light emitters. MICROTHERM 2019 conference - Microtechnology and Thermal Problems in Microelectronics, Jun 2019, Lodz, Poland. ⟨hal-02289634⟩