Thermal and pump power effect in SrMoO4:Er3+-Yb3+ phosphor for thermometry and optical heating

• Published in: Chemical physics letters 2017-01, Vol.667, p.226-232
• Main Authors: Soni, Abhishek Kumar, Rai, Vineet Kumar
• Format: Article
• Language: English
• Subjects: Laser induced optical heating; NIR laser diode; Optical temperature sensing; Thermally coupled level
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2016.12.002

Variation of the green UC emission band intensities at two different temperature of the SrMoO4:Er3+-Yb3+ phosphor which may be used in optical heating and temperature sensing (a) under 980nm and (b) under 808nm laser diode excitation. [Display omitted] •Er3+-Yb3+ codoped SrMoO4 phosphors have been synthesized via chemical co-precipitation route.•FIR of the two thermally coupled transitions at the same temperature is found independent of the pump wavelengths.•Upconverting phosphor can be used in making the temperature sensor probe to monitor the temperature with better sensitivity values.•The prepared phosphor upon NIR excitation may be suitable for optical heating and biomedical application. The pump power and temperature dependence study in the Er3+-Yb3+ codoped SrMoO4 phosphors for the green UC emission bands has been investigated by using two NIR (980nm and 808nm) laser radiation. The thermometric behaviour of the codoped phosphor operated in the 300–543K gives maximum sensitivity ∼25.5×10−3K−1 for 980nm excitation whereas, for 808nm excitation the maximum sensitivity is ∼21.5×10−3K−1 over 300–465K. The optical heating study upon two NIR laser radiations has also been performed. The experimental observations made in this article may be of significant interest for thermometry and optical heating.