Lead-free halide double-perovskite materials have been given extensive attention due to the charming fluorescent property and simple synthesis process. Their strong electro-acoustic coupling effects endow the materials with wideband emission properties and the tremendous potential application in white light emitting diodes (w-LEDs). Herein, the blue (456 nm) and yellow (578 nm) light emitting phosphors with broad band emission were synthesized by introducing the Bi3+ and Te4+ into the structure-stable and low toxicity Cs2ZrCl6 materials, respectively. The blue and yellow emission from 3P1 → 1S0 transitions of Bi3+ and Te4+ were achieved in Cs2ZrCl6: 7%Bi3+ and Cs2ZrCl6: 3%Te4+, where the large full width at half maximum (FWHM) values of 45 and 101 nm were attributed to the large Huang-Rhys factor and electro-acoustic coupling strength. The white LED fabricated through combining the 365 nm chip with the prepared blue and yellow phosphors exhibited wideband white light emission ranging from the 400 to 750 nm with correlated color temperature (CCT) 5028 K and good color rendering index (CRI) 84.