Highly efficient waveguide mode extraction elements of nanograting structures onto the flexible substrate of top-emitting organic light-emitting devices (TOLEDs) were realized with the assistance of thermal nanoimprint process. The introduction of the periodic corrugation has allowed a much enhanced light coupling through a thick Ag cathode by the grating-induced cross coupling between the SPPs associated with the top cathode and the high-index guided modes within the device. An enhanced EL efficiency and strong color shift have been observed. To nanoimprint the periodical corrugation in the flexible substrate of the TOLEDs leads to 54.3% enhancement in luminous efficiency compared to reference devices.
|Number of pages||3|
|Journal||Digest of Technical Papers - SID International Symposium|
|State||Published - 1 Jan 2013|
- extraction efficiency enhancement
- flexible electronics
- nanoimprint technique