[FLXp1-8L] Low-Voltage Driving of Inverted Organic Light-Emitting Diodes Utilizing Upconversion Process
Organic Light-Emitting Diode, Inverted Structure, Upconversion Process, Low-Voltage Driving
We fabricated inverted OLEDs using vacuum-deposited rubrene emitter layers and solution-processed acceptor layers composed of naphthalenediimid-based n-type polymer semiconductors. The fabricated OLEDs enable low-voltage driving with a turn-on voltage (1.3 eV) smaller than the bandgap energy of rubrene (2.2 eV) by utilizing the upconversion process via triplet-triplet annihilation.