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Publications (35/35 displayed)
- 2024Multimodal operando microscopy reveals that interfacial chemistry and nanoscale performance disorder dictate perovskite solar cell stability
- 2024Integration of metal meshes as transparent conducting electrodes into perovskite solar cellscitations
- 2023The Electronic Disorder Landscape of Mixed Halide Perovskitescitations
- 2023Template Pore Size and A‐Site Cation Management Dictate Luminescence Efficiency, Stability, and Wavelength in Confined Perovskite Nanostructures
- 2023The Electronic Disorder Landscape of Mixed Halide Perovskites.
- 2023Methylammonium-free co-evaporated perovskite absorbers with high radiation and UV tolerance: an option for in-space manufacturing of space-PV?citations
- 2022An open-access database and analysis tool for perovskite solar cells based on the FAIR data principlescitations
- 2022Local nanoscale phase impurities are degradation sites in halide perovskitescitations
- 2022The Electronic Disorde Landscape of Mixed Halide Perovskitescitations
- 2022Local nanoscale phase impurities are degradation sites in halide perovskites.
- 2022In-Situ and Operando Multimodal Microscopy of Metal Halide Perovskite Optoelectronic Devices
- 2022Taking a closer look - how the microstructure of Dion-Jacobson perovskites governs their photophysics.
- 2022Manipulating Color Emission in 2D Hybrid Perovskites by Fine Tuning Halide Segregation: A Transparent Green Emitter.
- 2022Understanding performance limiting interfacial recombination in pin Perovskite solar cellscitations
- 2022Stabilized tilted-octahedra halide perovskites inhibit local formation of performance-limiting phases.
- 2022Overcoming nanoscale inhomogeneities in thin-film perovskites via exceptional post-annealing grain growth for enhanced photodetectioncitations
- 2022Taking a closer look - how the microstructure of Dion-Jacobson perovskites governs their photophysics
- 2022Taking a closer look - how the microstructure of Dion-Jacobson perovskites governs their photophysicscitations
- 2021An open-access database and analysis tool for perovskite solar cells based on the FAIR data principlescitations
- 2021Multimodal Microscale Imaging of Textured Perovskite-Silicon Tandem Solar Cells.citations
- 2021Multimodal Microscale Imaging of Textured Perovskite-Silicon Tandem Solar Cells.
- 2021Unraveling the varied nature and roles of defects in hybrid halide perovskites with time-resolved photoemission electron microscopycitations
- 2021Nanoscale chemical heterogeneity dominates the optoelectronic response of alloyed perovskite solar cellscitations
- 2021Stabilized tilted-octahedra halide perovskites inhibit local formation of performance-limiting phasescitations
- 2021Unraveling the varied nature and roles of defects in hybrid halide perovskites with time-resolved photoemission electron microscopy.
- 2021Proton radiation hardness of perovskite tandem photovoltaics
- 2021Manipulating Color Emission in 2D Hybrid Perovskites by Fine Tuning Halide Segregation: A Transparent Green Emittercitations
- 2020Unraveling the antisolvent dripping delay effect on the Stranski-Krastanov growth of CH3NH3PbBr3 thin films: a facile route for preparing a textured morphology with improved optoelectronic properties.
- 2020Proton Radiation Hardness of Perovskite Tandem Photovoltaicscitations
- 2020Structural and spectroscopic studies of a nanostructured silicon-perovskite interface.
- 2020Photodoping through local charge carrier accumulation in alloyed hybrid perovskites for highly efficient luminescencecitations
- 2020Proton radiation hardness of perovskite tandem photovoltaicscitations
- 2020Unraveling the antisolvent dripping delay effect on the Stranski-Krastanov growth of CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> thin films: a facile route for preparing a textured morphology with improved optoelectronic propertiescitations
- 2019Charge-Carrier Recombination in Halide Perovskitescitations
- 2019Charge-Carrier Recombination in Halide Perovskites.
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article
The Electronic Disorde Landscape of Mixed Halide Perovskites
Abstract
Band gap tunability of lead mixed halide perovskites makes them promising candidates for various applications in optoelectronics. Here we use the localization landscape theory to reveal that the static disorder due to iodide:bromide compositional alloying contributes at most 3 meV to the Urbach energy. Our modeling reveals that the reason for this small contribution is due to the small effective masses in perovskites, resulting in a natural length scale of around 20 nm for the "effective confining potential" for electrons and holes, with short-range potential fluctuations smoothed out. The increase in Urbach energy across the compositional range agrees well with our optical absorption measurements. We model systems of sizes up to 80 nm in three dimensions, allowing us to accurately reproduce the experimentally observed absorption spectra of perovskites with halide segregation. Our results suggest that we should look beyond static contribution and focus on the dynamic temperature dependent contribution to the Urbach energy.