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Article | REF: E6507 V1

Organic light-emittig diodes : four different technologies

Authors: Joëlle RAULT-BERTHELOT, Cyril PORIEL

Publication date: April 10, 2021, Review date: April 29, 2021

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3. Phosphorescent OLEDs

In 1998, Forrest's team (Princeton University, USA) announced that they could recover 100% of the excitons formed in SCO by transferring them to a phosphorescent dopant present in small quantities in the latter . Phosphorescent diodes (PhOLEDs), whose emissive layer is a mixture of SCO and dopant, gradually took the place of fluorescent OLEDs, leading to a considerable increase in device performance.

3.1 Operating principle

In a PhOLED, the active layer is a SCO (serving as host matrix)...

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Phosphorescent OLEDs
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