Changes

* In OLED devices not all internally generated light is coupled out of the device (only 20%-50%), which reduces the device efficiency and lifetime. Interesting trend * Modification in structures are applied to improve outcouple efficiency in order to enhance the efficiency and Lifetime lifetime of top emission OLEDs . * Below is a snapshot of how various organizations are depictedusing different design structures, using the same principle of internal reflection, to achieve higher out-coupling efficiencies.