Tuning Charge‐Separated State Lifetimes in Perovskite Nanocrystal‐Perylenediimide Hybrids
Source abstract
Abstract
Abstract To surface engineer CsPbBr3 nanocrystals (NCs), the use of functional perylenediimides (PDIs) featuring carboxylic acids of different spacer lengths afforded hybrid materials such as NC@PDI‐Ph (phenyl spacer) and NC@PDI‐PhPr (phenylpropyl spacer). Properties that are not seen by the individual components, are investigated by an arsenal of steady‐state and time‐resolved techniques. These ranged from photoluminescence (PL) to ultrafast transient absorption spectroscopy (TAS) combined with global target analyses. Herein, charge separation from NCs to the electron‐accepting PDIs upon photoexcitation of either the NC or PDI unities is evidenced. Remarkable is not only the lifetime of the charge carriers, which is on the time scale of microseconds, that is, 34 and 63 µs for NC@PDI‐Ph and NC@PDI‐PhPr, respectively, but also the control over their lifetimes through tuning phenyl‐ versus phenylpropyl‐spacer length. These findings are of relevance to solar energy conversion, in general, and perovskite‐based devices, in particular.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Solid-state spectroscopy and crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Molecular Science University of Valencia c/Catedrático José Beltrán Martínez 2 Paterna Valencia 46980 Spain
Area of Organic Chemistry Institute of Bioengineering Miguel Hernández University Avda. Universidad S/N Elche 03202 Spain
FAU Profile Center Solar Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich‐Alexander‐Universität Erlangen‐Nürnberg (FAU) Egerlandstrasse 3 91058 Erlangen Germany
CONICET – Instituto de Química Física de Materiales Medio Ambiente y Energía (IN‐QUIMAE) Universidad de Buenos Aires Viamonte 430 Buenos Aires 1053 Argentina
Facultad de Ciencias Exactas y Naturales Departamento de Química Inorgánica Analítica y Química Física Universidad de Buenos Aires Viamonte 430 Buenos Aires 1053 Argentina
Funding
Generalitat Valenciana
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