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Improve efficiency of white organic light-emitting diodes by using nanosphere arrays in color conversion layers
The authors demonstrated an efficient color conversion layer (CCL) by using nanosphere arrays in down-converted white organic light-emitting diodes (WOLEDs). The introduced periodical nanospheres not only helped extract the confined light in devices, but also increased the effective light path to achieve high-efficiency color conversion. By applying a CCL with red phosphor on a 400-nm-period nanosphere array, we achieved 137% color conversion ratio for blue OLEDs, which was 2.68 times higherdoi:10.1364/oe.20.003005 pmid:22330538 fatcat:asnhjd2m4bbtfdjnthxpyzsary