Anti-Stokes photoluminescence study on a methylammonium lead bromide nanoparticle film. Issue 31 (3rd August 2020)

• Record Type: Journal Article
• Authors: Jancik Prochazkova, Anna; Mayr, Felix; Gugujonovic, Katarina; Hailegnaw, Bekele; Krajcovic, Jozef; Salinas, Yolanda; Brüggemann, Oliver; Sariciftci, Niyazi Serdar; Scharber, Markus C.
• Is Part Of: Nanoscale. Volume 12:Issue 31(2020)
• Page Start: 16556
• Page End: 16561
• Publication Date: 2020-08-03
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr04545d
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Photon cooling via anti-Stokes photoluminescence (ASPL) is a promising approach to realize all-solid-state cryo-refrigeration by photoexcitation. 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.