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

Nanoscale Adv. 2019 Aug 12;1(9):3388-3391. doi: 10.1039/c9na00486f. eCollection 2019 Sep 11.

Affiliations

¹ Department of Chemistry, School of Physical Sciences, Sikkim University India 737102 stamang@cus.ac.in.
² Department of Biomedical Sciences, University of Hull Hull HU6 7RX UK.
³ Department of Physics, University of Hull Hull HU6 7RX UK.
⁴ 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.