A novel upconverison phosphor Gd2Mo4O15:Yb3+, Ho3+: intense red emission and ratiometric temperature sensing under 980 nm excitation

In this paper, a novel upconversion phosphor is reported. Based on XRD and EDS, it is confirmed that the phosphor is monoclinic Gd2Mo4O15:Yb3+, Ho3+ with P21/c space group. The non-radiation decay of 5I6 to 5I7 dominants the depopulation of 5I6, thus the phosphor produces the red upconversion emission with high emission intensity and good color quality, and shows the favorable temperature sensing property. When using non-continuous excitation mode, the temperature sensitivity is determined as 0.0452 K−1. Because the sensitivity is the same at any temperature, the new upconversion material may have greater potential for temperature sensing application than Er3+ doped upconverison materials.