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Quantum Dot Light Sources

Lighting is one area where significant energy savings still need to be realized. For instance, traditional incandescent light bulbs only convert ~7% of the consumed electricity into visible light, while fluorescent lamps have an efficiency of ~25%. Significant progress has been made with semiconductor light sources with efficiencies now exceeding 40%. However, producing such semiconductor light sources is still expensive, and the color quality of often unsatisfactory. For the past decade there have been efforts to combine the efficiency advantages of semiconductor light emitters with the cost advantages of polymer processing in hybrid semiconductor nanocrystal-polymer devices. Semiconductor nanocrystals, sometimes also called quantum dots, are attractive for their size tunable light emitting properties.

The Kortshagen group works on integrating highly efficient silicon quantum dots into light emitting devices with conductive polymers. Work is conducted in collaboration with colleagues in Chemical Engineering and Materials Science and Electrical Engineering.

This work is funded by the National Science Foundation. Image from “Electroluminescence from Surface Oxidized Silicon Nanoparticles Dispersed Within a Polymer Matrix,” reference below.

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