Optical properties of white organic light-emitting devices fabricated utilizing a mixed CaAl₁₂O₁₉:Mn⁴⁺ and Y ₃Al₅O₁₂:Ce³⁺ color conversion layer

White organic light-emitting devices (OLEDs) were fabricated by combining a blue OLED with a color conversion layer made of mixed Y₃Al ₅O₁₂:Ce³⁺ green and Ca₁₂AlO ₁₉:Mn⁴⁺ red phosphors. The X-ray diffraction patterns showed that Ce³⁺ ions in the Y₃Al₅O ₁₂:Ce³⁺ phosphors completely substituted for the Y ³⁺ ions and the Mn⁴⁺ ions in the CaAl¹²O ¹⁹:Mn⁴⁺ phosphors completely substituted for the Ca ²⁺ ions. Electroluminescence spectra at 11 V for the OLEDs fabricated utilizing a color conversion layer showed that the Commission Internationale de l'Eclairage coordinates for the Y₃Al₅O ₁₂:Ce³⁺ and CaAl₁₂O₁₉:Mn ⁴⁺ phosphors mixed at the ratio of 1:5 and 1:10 were (0.31, 0.34) and (0.32, 0.37), respectively, indicative of a good white color.