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Crystallographic phase changes and damage thresholds of CsPbI3 microwire waveguides through continuous wave photoablation
journal contribution
posted on 2023-06-07, 06:59 authored by Kieran O Russell, Mark Osborne, Aidan FisherWe investigate waveguide efficiency of CsPbI3 microwire waveguides and their photodegradation over a range of continuous wave laser excitation energies and intensities. Under modest laser input intensities <1 kW cm-2 we observe a wavelength dependent efficiency of light propagation in the waveguides. At increased power densities and wavelengths of 473 nm or shorter, microwires undergo photoablation into discrete fragments. Use of diffraction-limited excitation allowed localised cleavage of the microwires with observation of transient photoluminescence from degradation products. TEM analysis of the microwires revealed transformation from the yellow d-phase to amorphous phases in the region of the photodamage with a degraded morphology consistent with efficient thermal transfer and induced melting.
History
Publication status
- Published
File Version
- Published version
Journal
Materials AdvancesISSN
2633-5409Publisher
Royal Society of ChemistryExternal DOI
Issue
2Volume
1Page range
161-166Department affiliated with
- Chemistry Publications
Research groups affiliated with
- Energy and Materials Chemistry Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2020-07-20First Open Access (FOA) Date
2020-07-20First Compliant Deposit (FCD) Date
2020-07-20Usage metrics
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