A novel two color white light-emitting poly(aryl ether) (P1) containing blue unit and orange unit in the side chains was synthesized by a facile

metal-free condensation polymerization

and then P2 and P3 were synthesized by introducing the light blue dopant (BCzVF) into P1's side chain.We studied solubility

thermal properties

electrochemical properties

optical properties and electroluminescent properties of the polymers.The results reveal that all the polymers have good solubility and high decomposition temperature

there are efficient energy transfer from deep blue unit to light blue unit and orange unit in solid film

and the PL spectra are almost same before and after annealing indicating their excellent spectral stability.Based on the single-layer device structure of (ITO/PEDOT:PSS/Polymers/Ca/Al)

white EL with simultaneous blue and orange emission was observed and was attributed to the partial energy transfer and charge trapping from the blue host to the orange dopant.The best device performance with a luminance efficiency of 7.96 cd/A

a maximum brightness of 9950 cd/m2 and CIE coordinates of (0.33

0.44) was achieved.