Luminescence from processible quantum dot-polymer light emitters 1100–1600 nm: Tailoring spectral width and shape

Bakueva, L.; Konstantatos, G.; Levina, L.; Musikhin, S.; Sargent, E.H.
May 2004
Applied Physics Letters;5/3/2004, Vol. 84 Issue 18, p3459
Academic Journal
Electroluminescent devices combining two families of PbS colloidal quantum dots to achieve spectrally tailored two-color emission are reported. Depending on device structure selected—the use of two separated layers versus a mixture of nanocrystals—the structures demonstrated light emission either in two infrared frequency peaks corresponding to the spectral region 1.1–1.6 μm or in a wide band spanning this same spectral region. Separated-layer devices exhibit wide tunability in the relative intensity of the two peaks by varying excitation conditions. Replacing oleate with octodecylamine ligands increases the internal electroluminescence efficiency to 3.1%. © 2004 American Institute of Physics.


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