White-light emitting single-phase phosphor La3Si6N11:Dy3+,Tb3+: Color tunable emission,thermal stability and energy transfer process |
| |
| Authors: | Yuanhong Liu Yuan Xue Ronghui Liu Mingyue Chen Guantong Chen Chunpei Yan Xia Zhang Yu′nan Zhou Wei Gao Xiaole Ma |
| |
| Affiliation: | 1. National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals, Beijing 100088, China;2. Grirem Advanced Materials Co. Ltd., Beijing 100088, China |
| |
| Abstract: | A novel white-light emitting single-phase phosphor La3Si6N11:Dy3+, exhibiting two emission peaks centering at 475 and 575 nm, was prepared via conventional solid-state reactions. The structure and morphology of La3Si6N11:Dy3+/Tb3+ were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The emission colors can be tuned from white to yellow-green through increasing the Tb3+ concentration in La3Si6N11:Dy3+,Tb3+. The mechanism of energy transfer (ET) from Dy3+ to Tb3+ is confirmed according to the excitation, emission spectra and decay lifetimes curve. The temperature-dependent luminescence measurements of La2.83Si6N11:0.1Dy3+,0.07Tb3+ were also performed, and a good thermal stability is shown, suggesting superior properties for the application as white light-emitting diodes (w-LEDs) phosphor. |
| |
| Keywords: | Single-phase White emission Energy transfer Rare earths |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ |
|
