So far, YAG: Ce³⁺ yellow phosphor excited by blue light still holds a large share in the white light emitting diode (LED) market. but it has inherent defects of red light components' deficiency, so the obtained white light has a low color-rendering index and a high color temperature. However, the white light that relies on rare earth ions to achieve the harmony of red, green, and blue primary colors can overcome this drawback effectively. This paper applied traditional hydrothermal reactions to synthesize red phosphor, a series of Sm³⁺ ion doped BaZrO₃ in the same phase as the substrate in one step and whose test results of X- ray diffraction (XRD), scanning electron microscopy (SEM), particle size distribution, Fourier transform infrared spectrum (FT-IR) and fluorescence spectrometer (FL) showed that the obtained products all exhibit a cubic perovskite structure and furthermore, after more heterovalent Sm³⁺ replaced Zr⁴⁺ ion, parameters, such as grain size, crystal cell parameters, and the lattice strain, were increased. In addition, as the concentration of Sm³⁺ ions increased, the infrared spectrum peak gradually shifted blue until reaching its maximum value at Sm³⁺=3.0 mol%, which was consistent with the result calculated by molecular vibrational frequency. Finally, the relationship based on the relative intensity between the broad emission band in the spectrum and the characteristic luminescence peak of Sm³⁺ verified that luminescence from defects existed in BaZrO₃ crystal, and after Sm³⁺ ions were introduced and the energy transmission between BaZrO₃ and Sm³⁺ could be realized.