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首页> 中文期刊> 《光：科学与应用（英文版）》 >Get it white: color-tunable AC/DC OLEDs

Get it white: color-tunable AC/DC OLEDs

         
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Organic light-emitting diodes(OLEDs)have gained considerable attention because of their use of inherently flexible materials and their compatibility with facile roll-to-roll and printing processes.In addition to high efficiency,flexibility and transparency,reliable color tunability of solid state light sources is a desirable feature in the lighting and display industry.Here,we demonstrate a device concept for highly efficient organic light-emitting devices whose emission color can be easily adjusted from deep-blue through cold-white and warm-white to saturated yellow.Our approach exploits the different polarities of the positive and negative half-cycles of an alternating current(AC)driving signal to independently address a fluorescent blue emission unit and a phosphorescent yellow emission unit which are vertically stacked on top of each other.The electrode design is optimized for simple fabrication and driving and allows for two-terminal operation by a single source.The presented concept for color-tunable OLEDs is compatible with application requirements and versatile in terms of emitter combinations.

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