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Issue 43, 2017
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Luminescence tuning and exciton dynamics of Mn-doped CsPbCl3 nanocrystals

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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 a tunable Mn photoluminescence (PL) band with a 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. The X-band EPR data and Mn PL decay behaviour of the NCs reveal that the exchange interaction between Mn2+ ions is mainly responsible for a 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 the host lattice. The large PL tuning reported here along with the insights into the mechanism of tuning and carrier dynamics are expected to boost the potential of Mn-doped CsPbCl3 NCs in light-powered devices.

Graphical abstract: Luminescence tuning and exciton dynamics of Mn-doped CsPbCl3 nanocrystals

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Supplementary files

Article information


Submitted
10 Sep 2017
Accepted
28 Sep 2017
First published
03 Oct 2017

Nanoscale, 2017,9, 16722-16727
Article type
Paper

Luminescence tuning and exciton dynamics of Mn-doped CsPbCl3 nanocrystals

A. De, N. Mondal and A. Samanta, Nanoscale, 2017, 9, 16722
DOI: 10.1039/C7NR06745C

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