[en] Aiming to broaden its application as wireless temperature sensors, a temperature-sensibility-enhanced Ba_1−xSm_2x/3(Zn_1/3Nb_2/3)O₃ (x = 0%–4.5%) ceramics with a large temperature coefficient of the resonant frequency have been prepared by conventional solid state reaction method. X-ray diffraction analysis shows that single-phase solid solutions are formed within x range of 0.37% to 3%. A minor substitution of Sm for Ba facilitates the enhancement of ε _r and τ _f, which is related to variations in polarizability and crystal structure. τ _f expands remarkably as x increases, indicating that Ba_1−xSm_2x/3(Zn_1/3Nb_2/3)O₃ ceramics could serve as a potential candidate for wireless passive temperature sensor application. Moreover, Photoluminescence and excitation spectra illustrate that Ba_1−xSm_2x/3(Zn_1/3Nb_2/3)O₃ exhibits luminescent properties. Although Raman spectra and scanning electron microscope studies reveal that excess Sm³⁺ dopant has destroyed the complex perovskite structure and generated secondary phase Ba₃Nb₂O₈, which have caused the deterioration of Q × f value, Sm³⁺ doped Ba(Zn_1/3Nb_2/3)O₃ ceramics paves the way to develop a promising multi-functional material utilized in temperature sensors and optical-electron integration devices in high frequency. (paper)