Multicolor Silicon Light-Emitting Diodes (SiLEDs)
Nano Letters2013Vol. 13(2), pp. 475–480
Citations Over TimeTop 1% of 2013 papers
Florian Maier‐Flaig, Julia Rinck, Moritz Stephan, Tobias Bocksrocker, Michael Brüns, Christian Kübel, Annie K. Powell, Geoffrey A. Ozin, Uli Lemmer
Abstract
We present highly efficient electroluminescent devices using size-separated silicon nanocrystals (ncSi) as light emitting material. The emission color can be tuned from the deep red down to the yellow-orange spectral region by using very monodisperse size-separated nanoparticles. High external quantum efficiencies up to 1.1% as well as low turn-on voltages are obtained for red emitters. In addition, we demonstrate that size-separation of ncSi leads to drastically improved lifetimes of the devices and much less sensitivity of the emission wavelength to the applied drive voltage.
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