The role of mid-gap states in all-inorganic CsPbBr3 nanoparticle one photon up-conversion

Benjamin J. Roman; Matthew Sheldon

doi:10.1039/C8CC02430H

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The role of mid-gap states in all-inorganic CsPbBr₃ nanoparticle one photon up-conversion†

Benjamin J. Roman

^a and Matthew Sheldon

*^ab

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* Corresponding authors

^a Department of Chemistry, Texas A&M University, College Station, Texas 77834, USA
E-mail: sheldonm@tamu.edu

^b Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77834, USA

Abstract

CsPbBr₃ nanoparticles that have been treated with NH₄SCN to produce essentially trap-free surfaces show an increase of one photon up-conversion quantum yield with little change to the up-conversion energy of activation, as estimated using an Arrhenius analysis. This suggests that mid-gap trap states constitute a loss pathway, and may not be integral to the one-photon excitation mechanism.

This article is part of the themed collection: 2018 Emerging Investigators

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Article information

DOI: https://doi.org/10.1039/C8CC02430H
Article type: Communication
Submitted: 27 Mar 2018
Accepted: 30 Apr 2018
First published: 01 May 2018

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Chem. Commun., 2018,54, 6851-6854

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The role of mid-gap states in all-inorganic CsPbBr₃ nanoparticle one photon up-conversion

B. J. Roman and M. Sheldon, Chem. Commun., 2018, 54, 6851 DOI: 10.1039/C8CC02430H

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