Multicolor silicon light-emitting diodes (SiLEDs).
basic_science · Level V
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- Record sourced from PubMed, PMID 23320768.
- Also identified by DOI 10.1021/nl3038689.
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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.