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Luminescence Tuning and Exciton Dynamics of Mn-doped CsPbCl3 Nanocrystals

Abstract

Mn-doped perovskite nanocrystals (NCs) are a new class of materials offering exciting opportunities to control over their optical and magnetic properties. Herein, we report a series of Mn-doped CsPbCl3 NCs exhibiting tunable Mn photoluminescence (PL) band with PL peak wavelength pushed up to 625 nm and tuned over a range of 40 nm, the largest achieved so far, by only varying the Mn content. X-band EPR data and Mn PL decay behaviour of the NCs reveal that exchange interaction between Mn2+ ions is mainly responsible for large shift of the Mn PL band. Ultrafast pump-probe measurements show that exciton-dopant energy transfer in these NCs is slower (~ 50-100 ps) than trapping of the carriers (~ 8-10 ps) in host lattice. The large PL tuning reported here along with the insights provided on the mechanism of tuning and carrier dynamics are expected to boost the potential of Mn-doped CsPbCl3 NCs in light-powered devices.

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Publication details

The article was accepted on 28 Sep 2017 and first published on 03 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR06745C
Citation: Nanoscale, 2017, Accepted Manuscript
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    Luminescence Tuning and Exciton Dynamics of Mn-doped CsPbCl3 Nanocrystals

    A. DE, N. Mondal and A. Samanta, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR06745C

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