We have successfully synthesized rare-earth doped gadolinium molybdate Gd 2 (MoO 4 ) 3 :Re 3+ (Re 3+ ¼ Eu 3+ , Tb 3+ , Tm 3+ and Er 3+ /Yb 3+ ) nanophosphors for solar cell application as a broad spectral converter from the ultraviolet (UV) to the near infrared (NIR) regions in a single host lattice using a facile solid state reaction method. The gross structure, surface morphology and microstructure of these nanophosphors have been investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission/high-resolution transmission electron microscopy (TEM/HRTEM) techniques , respectively. and Gd 2 (MoO 4 ) 3 :Tm 3+ nanophosphors demonstrate a strong green emission at 541 nm and a deep blue emission at 453 nm upon an excitation wavelength of 378 nm and 266 nm, respectively. Moreover, the upconversion characteristic of the Gd 2 (MoO 4 ) 3 :Er 3+ /Yb 3+ nanophosphor exhibits strong green emission at 545 nm and red emission at 657 nm corresponding to 4 S 3/2 -4 I 15/2 and 4 F 9/2 -4 I 15/2 transitions respectively. Furthermore, the Gd 2 (MoO 4 ) 3 :Er 3+ /Yb 3+ upconversion nanophosphor emits in the NIR spectrum region at 994 nm upon a 980 nm excitation wavelength. Hence, the obtained PL emission results with a lifetime in milliseconds reveal that these nanophosphors could be futuristic promising broad spectral converter phosphors which may possibly integrate with the next-generation Si-solar cell to enhance the efficiency of the cell.