High efficiency LED

Challenge

The light extraction of LEDs is the biggest challenge for designing high efficient LEDs. Current materials used for LED production show high refractive indices, which results to a back reflection of light at the material/air surface of LEDs. The described invention discloses a structure and material combination of organic and inorganic materials which allows a very efficient light extraction and the realization of high power LEDs.

Technology

The inventive LED structure consists of an inorganic semiconductor cylinder and a charge carrier injection zone in the semiconductor structure. The charge carrier injection zone is adjacent to the surface of the semiconductor cylinder. The organic material is suitable for emitting electromagnetic radiation in the event of charge carrier recombination, and the organic material is directly applied to the section of the surface of the semiconductor cylinder, that is bordered by the charge carrier injection zone. Electron hole pairs from the charge carrier injection zone of the semiconductor cylinder enter the organic material where they can excite the emission of electromagnetic radiation by recombination.

Commercial Opportunity

The technology is available for in-licensing or joint development.

Developmental Status

The proof of concept has been established.

Patent Situation

A priority claiming German patent application, DE102010019660, was filed in 2010, followed by an international PCT application validated in EP, EP2564445.

Further reading

Currently not available