Er³⁺-Tm³⁺-Yb³⁺:CaMoO₄phosphor as an outstanding upconversion-based optical temperature sensor and optical heater

Abstract

Optical temperature sensing in Er-Tm-Ybcodoped CaMoO phosphor prepared by chemical co-precipitation route based on the near infrared (NIR) to green upconversion emission from Er ion is reported. The variation with respect to external temperature in emission intensity ratio of the green emissions around 530 nm and 552 nm, corresponding to the H → I and S → I transitions respectively, under 980 nm excitation has been studied in detail, to report the sensing property of the prepared material; the maximum sensor sensitivity ∼0.0182 K was attained at 413 K. The laser induced optical heating within the prepared phosphor has been explored and the heat generation caused by the laser effect has been verified by comparison of experimental and calculated data.

Understanding the White-Emitting CaMoO4 Co-Doped Eu3+, Tb3+, and Tm3+ Phosphor through Experiment and Computation

“…Inorganic materials doped with RE 3+ (RE 3+ : rare earth) have structural disorders with a distribution of local cationic environments around the doping sites, which deviate from that of the ideal crystallographic positions. These materials attracted significant attention due to their novel structural characteristics and potential applications in various fields [34][35] . In particular, RE 3+ are added to the host matrices to enhance the luminescent properties 19,36 .…”

“…These materials attracted significant attention due to their novel structural characteristics and potential applications in various fields. 34,35 In particular, RE 3+ are added to the host matrices to enhance the luminescent properties. 19,36 PL spectroscopy is a very efficient tool for the evaluation of the order−disorder effects in semiconductors, which leads to a better understanding of the structural changes that take place in materials.…”

“…Inorganic materials doped with RE 3+ (RE 3+ : rare earth) have structural disorders with a distribution of local cationic environments around the doping sites, which deviate from that of the ideal crystallographic positions. These materials attracted significant attention due to their novel structural characteristics and potential applications in various fields. , In particular, RE 3+ are added to the host matrices to enhance the luminescent properties. , PL spectroscopy is a very efficient tool for the evaluation of the order–disorder effects in semiconductors, which leads to a better understanding of the structural changes that take place in materials. In particular, the scheelite-type molybdates are interesting materials , due to their scientific significance, especially with respect to technological applications .…”

Photoluminescence study in Ho3+/Tm3+/Yb3+/Li+:Gd2(MoO4)3nanophosphors for near white light emitting diode and security ink applications

“…Pandey et al reported colour tunability in the Ho 3+ /Tm 3+ /Yb 3+ :Y 2 O 3 phosphors [22]. Dey et al reported that the Er 3+ -Tm 3+ -Yb 3+ :CaMoO 4 phosphor can be used as an outstanding UC based optical temperature sensor and optical heater [23]. The luminescence efficiency in the singly doped phosphors is very low; therefore a suitable sensitiser is needed to increase the luminescence efficiency.…”

Bi3+ Effects on Down-/up-conversion Luminescence, Temperature Sensing and Optical Transition Properties in Bi3+/Er3+ Co-doped YNbO4  Phosphors

“…With the rapid development of modern technology, rare earth (RE 3+ ) ions doped luminescent materials have evoked great attention because of their potential and practical applications in solid-state lighting, optical imaging, temperature sensors, color displays and so on [1][2][3][4]. Among numerous RE 3+ ions, Er 3+ ion is considered to be an excellent green emitting center in down-/up-conversion (DC/UC) luminescence materials thanks to its predominant ( 2 H11/2, 4 S3/2) → 4 I15/2 transitions [5].…”