Enhancement of the stabilization in white organic light-emitting diodes utilizing a color conversion layer containing CdSe/ZnS quantum dots.
White organic light emitting diodes (WOLEDs) were fabricated utilizing blue emitting organic light emitting diodes and color conversion layers containing CdSe/ZnS quantum dots (QDs). The best color purity of the WOLEDs was achieved by using the red and green QDs ratio of 1:9.5. Commission Internationale de l'Eclairage coordinates of the WOLEDs slightly shifted from (0.35, 0.33) to (0.35, 0.32) with increasing applied voltage from 9 to 14 V, indicative of a deep stabilized white color. Color tunable mechanisms of WOLEDs with a color conversion layer containing CdSe/ZnS QDs are described on the basis of the experimental results.
Department of Electronics and Computer Engineering, Hanyang University, Seoul 133-791, Korea.
S S
SS
Park
D H
DH
Kim
Y P
YP
Jeon
T W
TW
Kim