Abstract
AbstractWe demonstrated a highly efficient color conversion layers (CCLs) by using nanosphere arrays for white organic light‐emitting diodes. The introduced periodical nanospheres not only help extract the confined light in devices, but also increase the effective light path to achieve more efficient color conversion. By applying the nanospheres patterned CCL on a PVK‐based phosphorescent blue OLED, 137% color conversion ratio had been achieved, which was 2.68 times higher than flat CCL. The resulting luminous efficiency of white device with patterned CCL (20.97 cd/A, 1000 cd/m2) was twice higher than the efficiency of the flat device (10.26 cd/A, 1000 cd/m2).
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