AUTHOR=Cantarano Alexandra , Ibanez Alain , Dantelle Géraldine 

TITLE=Garnet-Type Nanophosphors for White LED Lighting

JOURNAL=Frontiers in Materials

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.00210

DOI=10.3389/fmats.2020.00210

ISSN=2296-8016

ABSTRACT=<p>In this article we present a short review of the main wet chemical methods developed for the preparation of Ce<sup>3+</sup>-doped Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> (YAG:Ce) nanocrystals for their use as nanophosphors in LED lighting technology: combustion, co-precipitation, sol-gel, modified-Péchini, and solvothermal routes. We highlight the key synthesis steps and discuss them in the view of the size, crystal quality, and agglomeration state of the obtained nanocrystals. The photoluminescence internal quantum yield of these nanocrystals is also discussed in light of their morphology. In addition, we report on other garnet-type nanophosphors [Gd<sub>3</sub>Sc<sub>2</sub>Al<sub>3</sub>O<sub>12</sub>, (Gd,Y)<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>, etc.] doped with lanthanide ions (Ce<sup>3+</sup>, but also Eu<sup>3+</sup> or Dy<sup>3+</sup>) developed with the goal of obtaining a warmer white light. The spectroscopic properties of these nanophosphors, in particular their emission range, is discussed in relation with the doping nature, doping concentration, and crystal field of the host matrices.</p>