Development of Near Infrared-Fluorescent Nanophosphors and Applications for Cancer Diagnosis and Therapy
(a) Absorption spectrum of Y2O3:YbEr-NP. (b) Energy level diagram of Y2O3:YbEr-NP. (c) Fluorescence spectra of Y2O3:YbEr-NP (solid line) and Y2O3:Er-NP (dot line). The fluorescence was measured under an excitation wavelength of 980 nm.