Enhanced color conversion from colloidal CdSe/CdS dot/rods by vertical microcavities

Pühringer, H.; Roither, J.; Kovalenko, M. V.; Eibelhuber, M.; Schwarzl, T.; Talapin, D. V.; Heiss, W.
September 2010
Applied Physics Letters;9/13/2010, Vol. 97 Issue 11, p111115
Academic Journal
Colloidal CdSe/CdS dot/rods exhibit efficient photoluminescence from the spherical CdSe dots at wavelengths well below the absorption edge of the rod material. This property makes dot/rods advantageous for color conversion applications, especially when they are embedded in optical microcavities to improve light extraction in forward direction. Here, surface emitting half-wavelength microcavities are demonstrated containing films of dot/rods as active material, exhibiting luminescence enhancement factors of up to 21 at the resonator wavelengths, whereas with conventional CdSe/ZnS core-shell nanocrystals only half of this value is obtained.


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