Polarizer-free, high-contrast inverted top-emitting organic light emitting diodes: effect of the electrode structure.

Dual optical role of low-index injection layers for efficient polarizer-free high contrast-ratio organic light-emitting diodes.

Polarizer-free high contrast-ratio organic light-emitting diodes (OLEDs) are explored with a structure involving a semi-reflective Cr-based bottom electrode and a dielectric-capped thin Ag top electrode. Their efficiency is shown to be improved significantly with little sacrifice in luminous reflectance by adopting low-refractive-index injection layers that can increase the effective reflectanc...

Improved hole-injection contact for top-emitting polymeric diodes

Articles you may be interested in Lithium fluoride injection layers can form quasi-Ohmic contacts for both holes and electrons Appl. Efficient inverted top-emitting organic light-emitting diodes using ultrathin MoO 3 / C 60 bilayer structure to enhance hole injection Appl. Tuning hole injection and charge recombination with self-assembled monolayer on silver anode in top-emitting organic light-...

Thin-film Encapsulation of Organic Light-Emitting Diodes Using Single and Multilayer Structures of MgF2, YF3 and ZnS

In this research, the lifetime of green organic light emitting diodes (OLEDs) is studied using four passivation layers. To encapsulate the OLEDs, MgF2, YF3, composed of alternating MgF2/ZnS and YF3/ZnS layers were grown by thermal vacuum deposition. Measurements show that the device lifetime is significantly improved by using YF3 and ZnS as passivation layers. However, diodes encapsulated by Mg...

High-performance Single-unit and Stacked Inverted Top-emitting Electrophosphorescent Organic Light-emitting Diodes

Optimized efficiency and angular emission characteristics of white top-emitting organic electroluminescent diodes

The concept of an additional capping layer, which is deposited onto the semitransparent top contact, is applied to minimize microcavity effects for white light emission from top-emitting organic light emitting devices OLEDs . The influence on the optical properties of such devices with silver as top electrode material is discussed using an analytical method and numerical simulations. The result...