Strong Red Up‐Conversion Emission in Thin Film Devices Based on Rare‐Earth Oxides Obtained from Templating 2D Coordination Networks

GODOY, AGUSTÍN A.; GOMEZ, GERMÁN E.; MIRANDA, CARLOS D.; ILLESCAS, MARCOS; BARJA, BEATRIZ C.; VEGA, DANIEL; BERNINI, MARÍA C.; NARDA, GRISELDA E.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

WILEY-V C H VERLAG GMBH

Año: 2022

1434-1948

Coordination networks (CNs) with tailorable multi-metalliccomposition were designed and then used as sacrificialmaterials to obtain promising materials with Up-conversion(UC) properties. The metal-organic precursors led to solidsolutions of Rare-Earth Oxides (REO)Y2O3:Yb3+/Er3+ or Y2O3:Yb3+/Er3+/Gd3 through a calcination process. In order to obtainluminescent UC platforms, spin-coating technique was implemented to deposit these materials onto glass supports. Thesynthesized solids and the resulting films were characterized byScanning Electron Microscopy ? Energy Dispersive Spectroscopy(SEM-EDS), infrared spectroscopy, powder (PXRD), and grazingincidence (GIXRD) X-ray diffraction techniques. Moreover, thephotophysical properties of bulk and deposited Y2O3:Ln3+doped oxides were evaluated after being irradiated with NIRwavelength (980 nm) laser to excite the Yb3+ sensitizer ion.Besides, decay emission profiles from each sample were alsoobtained and lifetime (τobs) values were calculated. These resultsopen up the implementation of REO thin films obtainedthrough CN calcination for promising applications such as solarcells and sensor devices.