Deciphering the Energy Transfer Mechanism Across Metal Halide Perovskite‐Phthalocyanine Interfaces
Source abstract
Abstract
Abstract Energy transfer processes in nanohybrids are at the focal point of conceptualizing, designing, and realizing novel energy‐harvesting systems featuring nanocrystals that absorb photons and transfer their energy unidirectionally to surface‐immobilized functional dyes. Importantly, the functionality of these dyes defines the ultimate application. Herein, CsPbBr3 perovskite nanocrystals (NCs) are interfaced with zinc phthalocyanine (ZnPc) dyes featuring carboxylic acid. The functionality is the photosensitization of singlet oxygen. The CsPbBr3@ZnPc nanohybrid is to the best of our knowledge the first example, in which an unusual Dexter‐type singlet energy transfer between metal halide perovskite nanocrystals and phthalocyanine dyes enables singlet oxygen generation as a proof‐of‐concept application. A detailed temporal picture of the singlet energy transfer mechanism is made possible by combining key time‐resolved spectroscopic techniques, that are, femtosecond, nanosecond, and microsecond transient absorption spectroscopy as well as time‐correlated single photon counting, and target analyses. In fact, three excitonic components in the NCs govern a concerted Dexter‐type energy transfer. The work illustrates the potential of CsPbBr3@ZnPc as a singlet photosensitizer of ZnPc to produce singlet oxygen (1O2) almost quantitatively while photoexciting CsPbBr3.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Advanced Photocatalysis Techniques
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 46980 Valencia Spain
FAU Profile Center SolarDepartment 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
Blue World Technologies Egeskovvej 6C Kvistgaard 3490 Denmark
Department of Organic Chemistry and Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid Cantoblanco Madrid 28049 Spain
IMDEA‐Nanociencia Universidad Autónoma de Madrid c/Faraday, 9, Cantoblanco Madrid 28049 Spain
Department of Organic Chemistry University of Valencia Av. Vicent Andrés Estellés s/n Burjassot 46100 Valencia Spain
Funding
Solar Technologies go Hybrid · Generalitat Valenciana
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