Upconversion photoluminescence properties of SrY₂O₄:Er³⁺,Yb³⁺ under 1550 and 980 nm excitation

详细信息    查看全文

• 作者：Xianliang SHEN ((沈显良)) ; Mingming XING ((邢明铭)) ; Ying TIAN ((田 莹)) ; Yao FU ((付 姚)) ; Yong PENG ((彭 勇)) ; Xixian LUO ((罗昔贤)) ; ^{luoxixiandl@126.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：solid-state reaction method ; upconversion luminescence ; SrY2O4 ; Er3+/Yb3+ co-doped ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：34
• 期：5
• 页码：458-463
• 全文大小：1070 K

文摘

Er³⁺/Yb³⁺ co-doped SrY₂O₄ phosphors with high color purity and brightness were successfully synthesized via a solid-state reaction method. Luminescence spectrum studies showed that the main red peaks and the minor green peaks of upconversion emissions were located at approximately 634–681 nm and 543–570 nm, respectively, corresponding to the transitions of ⁴F_9/2?⁴I_15/2 and ⁴S_3/2?⁴I_15/2 of Er³⁺ ions. Under the excitation of 980 and 1550 nm lasers, the spectra of all of the samples exhibited similar peak positions but different intensities. When excited by the 980 nm laser, the intensity ratio of red to green emission increased with increasing Yb³⁺ doping concentration and decreased with increasing excitation power. In the case of 1550 nm excitation, the intensity ratio of red to green emission increased with increasing Yb³⁺ doping concentration and excitation power, thereby, improving the color purity of the red emission. The intensity of red emission was considerably stronger under 1550 nm excitation than that under 980 nm excitation. Therefore, the color of the proposed phosphors could be efficiently tuned by tailoring both the Yb³⁺ doping concentration and excitation power.