High Efficiency Silicon Nanocrystal Light Emitting Devices @ University of Minnesota

Author(s):

Kai-Yuan Cheng, Rebecca Anthony, Russell Holmes,  Uwe Kortshagen (UMN)

Hybrid light-emitting devices based on organic semiconductors and inorganic semiconductor nanocrystals are of great interest for applications in optical displays and solid-state light sources.  Silicon, a poor light emitter in bulk form, can exhibit strong luminescence in nanocrystal form; however, efficient electrical excitation had not been demonstrated. In this study, Cheng et al. showed a silicon nanocrystal device with an external quantum efficiency of 8.6%, the highest reported efficiency for any nanocrystal light emitting device.

Related publication(s):

1. Cheng et al., Nano Letters 2011, 11, 1952-1956