Anzeige
Erschienen in:
01.10.2007
Fabrication of upconversion emissive LaOCl phosphors doped with rare-earth ions for bioimaging probes
Erschienen in: Journal of Materials Science: Materials in Electronics | Sonderheft 1/2007
EinloggenAktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
Lanthanum oxychloride nanoparticles containing trivalent erbium ions were prepared through a self-hydrolysis process of hydrated chlorides of lanthanum and erbium. The phosphors were characterized by X-ray diffraction to be found in a single oxychloride phase. Irradiation on the powder with a 980-nm laser diode resulted in frequency upconversion into intense green emissions around 525--550 nm and red emissions around 650--670 nm. Stokes emission and excitation power dependence of the upconversion emission were also measured, and the dominant upconversion mechanisms were deduced to be the excited state absorption (ESA) and phonon-assisted energy transfer (PET) for green and red emissions, respectively.