High-efficiency OLEDs with phosphorescent materials
Brighter and more colourful than ever, organic light-emitting diode (OLED) displays boast several advantages compared to other display technologies. Not only do they provide the best image quality, but they are also thin, efficient and can be made to be transparent and flexible. What is more, they consume less power. Limited by electron spin–statistics, the maximum internal quantum efficiency of conventional fluorescent OLEDs is 25 %. Using the principle of phosphorescence, OLEDs generate light from both triplet and singlet excitons, allowing their internal quantum efficiency to reach nearly 100 %. The EU-funded AIE-RTP-PLED project plans to develop polymers that demonstrate room-temperature phosphorescence and aggregation-induced emission. Polymers combining these properties demonstrate great potential for use as high-efficiency emitters in low-cost solution-processed OLEDs.
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