ZnSe-based mixed-color LEDs

II-VI mixed-color light-emitting diodes (LEDs) were prepared by molecular beam epitaxy. At 20 K, it was found that we could achieve a near white light emission from sample 1O2B quantum well with a Commission Internationale de Enluminure index of x=0.4 and y=0.45. By carefully designing the device structure, we should be able to achieve a phosphor free white light LED by using the combinations of ZnCdSe and ZnCdSeTe wells.