High efficiency, low cost and long lifetime: pick two when it comes to making a blue OLED. Though not quite ready for commercial application, Japanese researchers may have found the solution.
OLED displays are commonplace these days, but that doesn’t mean the technology has reached a state of perfection. Manufacturers are more or less forced to pick blue pixels that, compared to their red and green counterparts, aren’t very good at producing light. More efficient blue OLEDs are available, but they’re either too expensive or their lifespan is not good enough for commercial application.
Researchers from Japan appear to have finally overcome this trade-off. They stacked two different OLED materials to create a stable and efficient organic emitter of deep blue light. The tandem structure effectively doubled both the emission at the same electrical current and the lifetime at high brightness.
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