Optical thermometry through green and red upconversion emissions in Er3+/Yb3+/Li+:ZrO2 nanocrystals

✍ Scribed by Lu Liu; Yuxiao Wang; Xueru Zhang; Kun Yang; Yunfeng Bai; Chuanhai Huang; Yinglin Song

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 781 KB
• Volume: 284
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2010.12.030

✦ Synopsis

Variations of fluorescence intensity ratio of green (generated from Er 3+ 2 H 11/2 and 4 S 3/2 levels) and red (generated from the sublevels of Er 3+ 4 F 9/2 level) upconversion emissions in Er 3+ /Yb 3+ /Li + :ZrO 2 nanocrystals have been studied as a function of temperature under 976 nm laser diode excitation. In the temperature range of 323-673 K, the maximum sensitivities of about 0.0134 K -1 and 0.0104 K -1 are obtained by using green and red emission, respectively. Er 3+ /Yb 3+ /Li + :ZrO 2 nanocrystals show potential application value in nanoscale thermal sensor.