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Preparation and Upconversion Properties of Yb 3+ , Ho 3+ : Lu 2 O 3 Nanocrystalline Powders
Author(s) -
An Liqiong,
Zhang Jian,
Liu Min,
Wang Shiwei
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00192.x
Subject(s) - photon upconversion , nanocrystalline material , materials science , analytical chemistry (journal) , precipitation , scanning electron microscope , x ray crystallography , diffraction , nanotechnology , doping , optics , chemistry , optoelectronics , physics , composite material , meteorology , chromatography
Yb 3+ , Ho 3+ : Lu 2 O 3 nanocrystalline powders were synthesized by a reverse‐strike co‐precipitation method using NH 4 HCO 3 and NH 3 ·H 2 O as precipitators. X‐ray diffraction analysis and field emission scanning electron microscopy observation showed that the phase composition of the powders was cubic and the particle size was 30–50 nm. Under the excitation of a 980 nm continuous wave diode laser, green and red emissions centered around 548 and 667 nm, respectively, were observed and the green emission dominated the upconversion spectrum. Power studies revealed that a two‐photon process was involved in the upconversion emissions and the possible upconversion mechanisms were discussed.