Fig. 3: Evaluation of CMETLs in inverted OLEDs.
From: Understanding coordination reaction for producing stable electrode with various low work functions

a Schematic illustration of CMETLs. b Luminance (L)–voltage and c current density (J)–voltage characteristics of inverted OLEDs prepared using four CMETLs. d Images of light-emitting areas of inverted OLEDs without encapsulation as a function of storage time. Although dc current was applied to the inverted OLEDs at the time of measurement, dc current was not applied under the storage condition. e Decay in light-emitting area of inverted OLEDs.