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Achieving high current densities with novel organic LEDs

Over the past few decades, organic LEDs (OLEDs) have been extensively studied. These devices have promising properties (e.g., high electroluminescence efficiency, flexibility, light weight, and low manufacturing cost) and have thus found various applications, such as in flat-panel displays and solid-state lighting.1, 2 In modern OLEDs, highly conductive transport layers are used to reduce injection barriers and to allow low operation voltages.3–5 In these so-called pin-OLEDs, vertical current transport works efficiently within a stack size of about 100nm.

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