Anti-Stokes photoluminescence study on a methylammonium lead bromide nanoparticle film
Autor: | Oliver Brüggemann, Markus C. Scharber, Niyazi Serdar Sariciftci, Yolanda Salinas, Anna Jancik Prochazkova, Katarina Gugujonovic, Jozef Krajčovič, Bekele Hailegnaw, Felix Mayr |
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Rok vydání: | 2020 |
Předmět: |
Photoluminescence
Materials science Phonon business.industry Physics::Optics Nanoparticle Activation energy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Photoexcitation Condensed Matter::Materials Science Excited state Optoelectronics General Materials Science Thin film business Excitation |
Zdroj: | Nanoscale. 12:16556-16561 |
ISSN: | 2040-3372 2040-3364 |
Popis: | 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. |
Databáze: | OpenAIRE |
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