4.1: Cumulative Lifetime Enhancement Effect of Deuteration in Blue OLEDs

The cumulative effects of deuteration on the device lifetime of blue OLEDs with emitters based on common polycyclic aromatic hydrocarbons were studied using two anthracene‐based host materials. Their deuterated analogues with incremental deuterium substitutions exhibited similar EL efficiencies but progressively prolonged device lifetimes as a function of deuteration.