Self-assembly processes for organic LED electrode passivation and charge injection balance

The performance of organic LEDs can be improved by modifying the organic th in film-electrode interface. Here is reported the use of layer-by-layer, se lf-limiting chemisorptive siloxane self-assembly techniques to deposit laye rs of the capping agent octachlorotrisiloxane between an indium tin oxide a node layer and the hole transport layer. Such techniques can yield nearly p inhole-free dielectric layers with angstrom-level control over total dielec tric layer thickness. Examination of the physical and electronic properties of the resulting devices shows that the external quantum and luminous effi ciencies of the LED are significantly enhanced after the introduction of th e dielectric layers.