Issue 31, 2020

Anti-Stokes photoluminescence study on a methylammonium lead bromide nanoparticle film

Abstract

Photon cooling via anti-Stokes photoluminescence (ASPL) is a promising approach to realize all-solid-state cryo-refrigeration by photoexcitation. Photoluminescence quantum yields close to 100% and a strong coupling between phonons and excited states are required to achieve net cooling. We have studied the anti-Stokes photoluminescence of thin films of methylammonium lead bromide nanoparticles. We found that the anti-Stokes photoluminescence is thermally activated with an activation energy of ∼80 meV. At room temperature the ASPL up-conversion efficiency is ∼60% and it depends linearly on the excitation intensity. Our results suggest that upon further optimization of their optical properties, the investigated particles could be promising candidates for the demonstration of photon cooling in thin solid films.

Graphical abstract: Anti-Stokes photoluminescence study on a methylammonium lead bromide nanoparticle film

Supplementary files

Article information

Article type
Paper
Submitted
15 Jun 2020
Accepted
22 Jul 2020
First published
25 Jul 2020
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2020,12, 16556-16561

Anti-Stokes photoluminescence study on a methylammonium lead bromide nanoparticle film

A. Jancik Prochazkova, F. Mayr, K. Gugujonovic, B. Hailegnaw, J. Krajcovic, Y. Salinas, O. Brüggemann, N. S. Sariciftci and M. C. Scharber, Nanoscale, 2020, 12, 16556 DOI: 10.1039/D0NR04545D

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