Long-term ambient air-stable cubic CsPbBr3 perovskite quantum dots using molecular bromine

Surakcha Thapa; Karishma Bhardwaj; Siddhant Basel; Sajan Pradhan; Charlotte J. Eling; Ali M. Adawi; Jean-Sebastien G. Bouillard; Graeme J. Stasiuk; Peter Reiss; Anand Pariyar; Sudarsan Tamang

doi:10.1039/C9NA00486F

Long-term ambient air-stable cubic CsPbBr₃ perovskite quantum dots using molecular bromine†

Surakcha Thapa,‡^a Karishma Bhardwaj,‡^a Siddhant Basel,‡^a Sajan Pradhan,^a Charlotte J. Eling,^b Ali M. Adawi,

^c Jean-Sebastien G. Bouillard,^c Graeme J. Stasiuk,

^b Peter Reiss,

^d Anand Pariyar

^a and Sudarsan Tamang

*^a

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* Corresponding authors

^a Department of Chemistry, School of Physical Sciences, Sikkim University, India
E-mail: stamang@cus.ac.in

^b Department of Biomedical Sciences, University of Hull, Hull, UK

^c Department of Physics, University of Hull, Hull, UK

^d Univ. Grenoble Alpes, CEA, CNRS, IRIG/SyMMES/STEP, 38000 Grenoble, France

Abstract

We report unprecedented phase stability of cubic CsPbBr₃ quantum dots in ambient air obtained by using Br₂ as halide precursor. Mechanistic investigation reveals the decisive role of temperature-controlled in situ generated, oleylammonium halide species from molecular halogen and amine for the long term stability and emission tunability of CsPbX₃ (X = Br, I) nanocrystals.

This article is part of the themed collection: Quantum and carbon dots

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Long-term ambient air-stable cubic CsPbBr₃ perovskite quantum dots using molecular bromine†

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