The present study reports the preparation of nanomaterials by successful method of solvothermal synthesis of GdPO4:Nd3+/Ho3+which appear upconversion and downconversion nanomaterials in luminescence. These nanophosphors emit green and red color light whereas GdPO4: Nd3+/Ho3+downconversion peaks are observed at 460, 550, 672, and 791nm after excitation at 300nm and 532nm. We can observe a non-radiative resonance energy transfer take place along with the P-O CT (Charge Transfer) band of Holmium ions (Ho3+) there by improving emission of Ho3+ions we can also observed that upconversion (UC) nanophosphor GdPO4: Nd3+/Ho3+, this allows for large-scale luminescence creation and improvement. The upconversion emission spectra reveals a clear expectant peak at 550 & 791 nm, 672 and 791 nm of Ho3+ion on high 808 nm laser illumination is observed due to the presence of Nd3+.the method produce well crystalline nanoparticles with a range of a small number of nanometre’s to tens of nanometre’s as from the experimental study at 300nm & 532nm excitation, GdPO4: Nd3+/Ho3+ yielded. A high quantum yield value, indicating that these experimental studies have a wide range of applications for nanophosphor materials.

Solvothermal method; Neodymium ion; Holmium ion, Gadolinium ion, Photoluminescence, upconversion, downconversion