Photoluminescence dynamics at fast and slow time scale in PbSe nanocrystals

Rafael Quintero-Torres; Jeff F. Young

doi:10.1117/12.2053463

2 May 2014 Photoluminescence dynamics at fast and slow time scale in PbSe nanocrystals

Rafael Quintero-Torres, Jeff F. Young

Proceedings Volume 9126, Nanophotonics V; 912607 (2014) https://doi.org/10.1117/12.2053463
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

Abstract

Photoluminescence as a function of time, wavelength and temperature is used to elucidate the relaxation of energy in PbSe as a function of the structural arrangement of the nanocrystals. The contribution of radiation emission, Förster exchange and nonradiative relaxation are accounted in processes from 77 to 300 K and in the wavelength from 1.65 to 1.20 um and in temporal scales from 1 ns to 10 us. Important contribution to the nonradiative relaxation with the mesoscopic arrangement of the nanocrystals and evidence of the Föster exchange independent of temperature and around 25 ns is measured. The general description of relaxation is used as well to correlate with the complex interaction between nanocrystals.

Citation Download Citation

Rafael Quintero-Torres and Jeff F. Young "Photoluminescence dynamics at fast and slow time scale in PbSe nanocrystals", Proc. SPIE 9126, Nanophotonics V, 912607 (2 May 2014); https://doi.org/10.1117/12.2053463

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