Organic Light Emitting Diodes: Fundamentals and Applications

This lecture covers the fundamentals and applications of Organic Light Emitting Diodes (OLEDs), two-terminal devices made from organic semiconductors used for displays and lighting. It explains the energy diagrams of monolayer, double-layer, and multilayer OLED devices, detailing the charge carrier injection, transport, exciton formation, and radiative decay. The impact of electron blocking layers on efficiency is discussed, along with the evolution of OLEDs from monolayer to multilayer structures. The lecture also explores OLED displays in commercial products like TVs, laptops, and smartphones, emphasizing the encapsulation of individual OLEDs driven by thin-film transistors for long-term stability.