|About this Abstract
||Materials Science & Technology 2015
||Ceramic Optical Materials
||Praseodymium-doped SiAlON Red Phosphors Prepared by Polymer-derived Method
||Hui Yu, Quan Li, Xuan Cheng, Ying Zhang, Chaoyang Gong
|On-Site Speaker (Planned)
The red emission praseodymium (Pr)-doped SiAlON (SiAlON:Pr) and the Pr-doped silicon nitride (Si<sub>3</sub>N<sub>4</sub>:Pr) phosphors were prepared by a new and facile synthesis route via nitridating and calcinating a precursor formed by reacting polycarbosilane and Pr acetylacetonate with/without Al acetylacetonate. The effects of sintering temperatures and nominal ratios of Si/Pr on photoluminescent properties were examined. It was shown that the phases of α-Si<sub>3</sub>N<sub>4</sub> and β-Si3N4 coexisted, and two emission peaks at 566 nm and 610 nm were observed for Si<sub>3</sub>N<sub>4</sub>:Pr phosphor. For the SiAlON:Pr phosphor sintered at 1550 °C, the phases of β-SiAlON and Si<sub>2</sub>N<sub>2</sub>O were identified with two emission peaks at 566 nm and 610 nm. However, for SiAlON:Pr phosphors sintered above 1600 °C, only one emission peak at 623 nm was observed with a dominated β-SiAlON phase. The double-exponential photoluminescence behaviors were found for both Si<sub>3</sub>N<sub>4</sub>:Pr and SiAlON:Pr phosphors.
||Planned: MS&T all conference proceedings CD