Singh, PriyamShahi, P.K.Rai, AnitaBahadur, A.Rai, S.B.2025-03-012025-03-0120169253467https://dl.bhu.ac.in/ir/handle/123456789/74115Ho3+/Yb3+ codoped Gd2O3 phosphor has been synthesized by solution combustion method. The concentrations of Ho3+ and Yb3+ were optimized to be 0.3 and 2.0 mol% respectively for maximum emission intensity. The effect of Li+ ion co-doping on phase structure and photo luminescence were investigated. It is found that there is no change in phase of the sample due to Li+ ion co-doping. However the Upconversion (UC) and Downshifting (DS) emission show a remarkable enhancement in intensity. It is concluded that, this enhancement in the emission intensity is mainly due to the change in crystal field around the Ho3+ ion and reduction in quenching centers. The optimum doping concentration of Li+ ion was found to be 20 mol%. We have further explored the temperature sensing behavior using the FIR technique. The maximum sensitivity is found to be 0.0092 K−1 at 505 K. © 2016 Elsevier B.V.DownshiftingEnergy transferLanthanidesTemperature sensingUpconversionArticlehttps://doi.org/10.1016/j.optmat.2016.06.010