The present study reports the structure and optical properties of Sr-doped NdFeO₃ nanoparticles synthesized by the simple co-precipitation method without the introduction of surfactants. Structural phase formation of the crystal exhibited orthorhombic planes of all samples (Nd_1-xSr_xFeO₃; x = 0.1, 0.2, and 0.3).The average crystal size and unit cell volume are increasing with a dopant (D_XRD = 28 ± 3–35±3 nm;V = 236.52–238.07 A^˚3). The obtained Sr-doped NdFeO₃ nanoparticles have higher absorption in the visibleregion (k = 400–800 nm) than in the UV range (k = 200–400 nm) and the band gap value(E_g = 0.87–1.06 eV) is much lower than similar rare-earth perovskite series such as NdFe_1-xCo_xO₃, Y_1-xSm_xFeO₃, HoFe_1-xNi_xO₃, LaFe_1-xTi_xO₃, and Y_1-xGd_xFe_1-xCo_yO₃ synthesized by different methods.The excellent optical properties of Sr-doped NdFeO₃ nanomaterials give them great potential for applications related to optics.

Sr-doped NdFeO₃ nanoparticles were synthesized by the simple co-precipitation method. The obtained Sr-doped NdFeO₃ nanoparicles have higher absorption in the visible region than in the UV range and the band gap value (E_g^- = 0.87–1.06 eV) is much lower than similar rare-earth perovskites synthesized by different methods.