TY - JOUR
T1 - Bright white upconversion emission from Yb3+, Er3+, and Tm3+-codoped Gd2O3 nanotubes
AU - Zheng, Kezhi
AU - Zhang, Daisheng
AU - Zhao, Dan
AU - Liu, Ning
AU - Shi, Feng
AU - Qin, Weiping
PY - 2010/7/21
Y1 - 2010/7/21
N2 - Yb3+, Er3+, and Tm3+-codoped Gd 2O3 nanotubes were synthesized via a simple wet-chemical route at low temperature and ambient pressure followed by a subsequent heat treatment at 800°C. X-Ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), upconversion (UC) emission spectra, and kinetic decay were used to characterize the samples. Bright white UC luminescence in the nanotubes was observed under diode laser excitation of 980 nm. The white light consists of the blue (1G 4 → 3H6 of Tm3+), green ( 2H11/2/4S3/2 → 4I15/2 of Er3+), and red (4F 9/2 → 4I15/2 of Er3+) UC emissions. As the excitation power density changed in the range of 20-200 W cm-2, the calculated CIE color coordinates shift only slightly and fall well within the white region. This material may be a potential candidate for applications of color displays, lighting and photonics.
AB - Yb3+, Er3+, and Tm3+-codoped Gd 2O3 nanotubes were synthesized via a simple wet-chemical route at low temperature and ambient pressure followed by a subsequent heat treatment at 800°C. X-Ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), upconversion (UC) emission spectra, and kinetic decay were used to characterize the samples. Bright white UC luminescence in the nanotubes was observed under diode laser excitation of 980 nm. The white light consists of the blue (1G 4 → 3H6 of Tm3+), green ( 2H11/2/4S3/2 → 4I15/2 of Er3+), and red (4F 9/2 → 4I15/2 of Er3+) UC emissions. As the excitation power density changed in the range of 20-200 W cm-2, the calculated CIE color coordinates shift only slightly and fall well within the white region. This material may be a potential candidate for applications of color displays, lighting and photonics.
UR - http://www.scopus.com/inward/record.url?scp=77954334874&partnerID=8YFLogxK
U2 - 10.1039/b922230h
DO - 10.1039/b922230h
M3 - Article
AN - SCOPUS:77954334874
SN - 1463-9076
VL - 12
SP - 7620
EP - 7625
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 27
ER -