Augmenting color homogeneity and luminous flux of WLEDs with dual-layer structure of the remote phosphor package Authors Liao H.Y., Loan N.T.P., Tho L.V., That P.T., Le P.X., Anh N.D.Q., Chen M.J., Chang J.C., Lee H.Y. Publisher Optoelectronics and Advanced Materials, Rapid Communications Publication year 2020