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Enhancement of band edge emission of CdSe nano-tetrapods by suppression of surface trapping

Abstract

Preparation of CdSe nano-tetrapods in controlled environment, using a glove box, is found to eliminate surface trap emission to a large extent. This is manifested in an increase of band edge photoluminescence quantum yield by a factor of 20 and concomitant decrease in that of surface trap emission by a factor of 8. Interestingly, time for recovery of ground state bleach is more or less same in the two kinds of nano-tetrapods, even though dynamics of photoluminescence is significantly slower in the more emissive ones. In single emissive nano-tetrapods, kinetic traces for ground state bleach recovery become gradually faster upon increasing pump power. This is likely to be due to the effect of multiexciton relaxation and nonradiative Auger recombination.

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Publication details

The article was received on 11 Jan 2019, accepted on 04 Apr 2019 and first published on 04 Apr 2019


Article type: Paper
DOI: 10.1039/C9CP00198K
Citation: Phys. Chem. Chem. Phys., 2019, Accepted Manuscript

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    Enhancement of band edge emission of CdSe nano-tetrapods by suppression of surface trapping

    S. Banerjee, B. G. Maddala, F. Ali and A. Datta, Phys. Chem. Chem. Phys., 2019, Accepted Manuscript , DOI: 10.1039/C9CP00198K

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