Issue 26, 2019

Chlorine-additive-promoted incorporation of Mn2+ dopants into CsPbCl3 perovskite nanocrystals

Abstract

Effective Mn2+ doping in a CsPbCl3 lattice utilizing manganese acetate and trimethylchlorosilane is achieved via a one-pot hot-injection synthesis method. This strongly contrasts to the previous case, where only the MnCl2 precursor was suitable for Mn2+ doping by considering the matching of bond dissociation energies between Mn–Cl and Pb–Cl. The Mn doping concentration and luminescence quantum yield are highly dependent on trimethylchlorosilane content. A new doping mechanism is proposed, where the incorporation of Mn2+ into CsPbCl3 is achieved via directly inserting [MnCl6]4− octahedra into the perovskite structure during the nucleation/growth processes instead of Mn-to-Pb cation exchange. Accordingly, increasing Cl content in the reaction solution indeed promotes the doping of other divalent transition metal ions such as Ni2+, Cu2+ and Zn2+ in CsPbCl3 and improve the quantum yield of CsPbCl3 nanocrystals up to ∼20% compared to the undoped counterparts (∼1%).

Graphical abstract: Chlorine-additive-promoted incorporation of Mn2+ dopants into CsPbCl3 perovskite nanocrystals

Supplementary files

Article information

Article type
Communication
Submitted
31 May 2019
Accepted
14 Jun 2019
First published
14 Jun 2019

Nanoscale, 2019,11, 12465-12470

Chlorine-additive-promoted incorporation of Mn2+ dopants into CsPbCl3 perovskite nanocrystals

S. Zhou, Y. Zhu, J. Zhong, F. Tian, H. Huang, J. Chen and D. Chen, Nanoscale, 2019, 11, 12465 DOI: 10.1039/C9NR04663A

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