Physics / mechanism
Organic light-emitting diode: current injected into a thin-film organic semiconductor stack drives radiative recombination of electron-hole pairs directly in the emissive layer—no backlight required. Stack typically: anode (ITO or metal oxide) / HTL / EML / ETL / cathode. Key parameters: external quantum efficiency (EQE) up to ~40% for phosphorescent and TADF emitters; color gamut >100% DCI-P3; response time <1 µs; contrast theoretically infinite (per-pixel off). State-of-the-art blue TADF and hyperfluorescence emitters push EQE >30% while targeting lifetimes (LT95) >10,000 hrs—historically the weak link. Flexible substrates (PI foil) enable form factors rigid OLED cannot. Leading fabs: Samsung Display, LG Display, BOE.
Competitive landscape
MicroLED is the primary long-term threat—superior brightness (>10,000 nits), no burn-in, longer lifetime—but mass transfer yield and cost remain unsolved below 50 µm pitch. Mini-LED-backlit LCD competes on cost and brightness in large-format. QD-OLED (Samsung) hybridizes quantum-dot color conversion on blue OLED backplane, improving gamut and brightness. QLED (electroluminescent) is nascent. Key differentiators vs. competitors:
Companies using
Connected ideas
Sources
Frontier (open questions)
- To be added.