Water‐Induced and Wavelength‐Dependent Light Absorption and Emission Dynamics in Triple‐Cation Halide Perovskites
Source abstract
Abstract
Abstract Metal halide perovskites (MHP) can be made more stable through the addition of small amounts of cesium. Despite the improvement, these multication absorbers still display strong environmental sensitivity to any combination of factors, including water, oxygen, bias, temperature, and light. Here, the relationship is elucidated between light absorption, charge carrier radiative recombination, and relative humidity (rH) for the Cs0.05FA0.79MA0.16Pb(I0.83Br0.17)3 composition, revealing partially reversible reductions in the extinction coefficient and fully reversible 25× enhancements in absolute light emission registered across the same humidity cycles up to 70% rH. With in situ excitation wavelength‐dependent measurements, irreversible changes are identified in the perovskite after a single cycle of humidity‐dependent photoluminescence (PL) performed with 450 nm excitation. The in situ measurement platform can be extended to test the effect of other stressors on thin films’ optical behavior.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering University of Maryland College Park MD 20742 USA
Institute for Research in Electronics and Applied Physics University of Maryland College Park MD 20742 USA
Department of Physics University of Maryland College Park MD 20742 USA
Helmholtz‐Zentrum Berlin für Materialien und Energie Kekuléstraße 5 12489 Berlin Germany
Department of Chemical, Materials and Production Engineering University of Naples Federico II Piazzale Tecchio 80, Fuorigrotta Naples 80125 Italy
Department of Electrical and Computer Engineering University of California Davis CA 95616 USA
Department of Materials Science and Engineering University of California Davis CA 95616 USA
Funding
National Science Foundation
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