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In this work, approaches to improve current efficiency of white organic light-emitting diodes (WOLEDs) with high color purity have been studied. The emission layer in devices consists of 2-(t-butyl)-9,10-bis(2'-naphthyl)anthracene (TBADN) blue host and 5,6,11,12-tetraphenylnaphthacene (rubrene) yellow dopant. The efficiency can be enhanced by using architecture of dual emission layers and hole-blocking...
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