Upconversion temperature sensing assists the understanding of light-emitting properties in Gd_2(MoO_4)_3:Y~(3+)/Yb~(3+)/Er~(3+)-based LED

摘要

In this work, the upconversion temperature sensing was used to study the light-emitting properties of Gd_2(MoO_4)_3:Y~(3+)/ Yb~(3+)/Er~(3+)-based LED. In order to obtain high-intensity upconversion luminescence, we studied the effect of Y~(3+) doping concentration on the photon upconversion of Yb~(3+)/Er~(3+)-activated Gd_2(MoO_4)_3under 940 nm excitation. We also explored the calibration of upconversion temperature sensing and established a reliable temperature scale. Finally, the light-emitting properties of an operating LED that consisted of a 940-nm semiconductor chip and the optimum phosphor were studied by using the upconversion luminescence thermometry.