Multifold Enhanced Photon Upconversion in a Composite Annihilator System Sensitized by Perovskite Nanocrystals.

Autor: Chua XW; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K.; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Innovis #08-03, Singapore 138634, Singapore.; Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K., Dai L; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K.; Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K., Anaya M; Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.; Departamento Física de la Materia Condensada, Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Calle Américo Vespucio 49, Sevilla 41012, Spain., Salway H; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K.; Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K., Ruggeri E; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K., Bi P; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Innovis #08-03, Singapore 138634, Singapore., Yang Z; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Innovis #08-03, Singapore 138634, Singapore., Stranks SD; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, U.K.; Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K., Yang L; Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Innovis #08-03, Singapore 138634, Singapore.; Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, #03-09 EA, Singapore 117575, Singapore.
Jazyk: angličtina
Zdroj: ACS nano [ACS Nano] 2024 Jun 11; Vol. 18 (23), pp. 15229-15238. Date of Electronic Publication: 2024 May 31.
DOI: 10.1021/acsnano.4c03753
Abstrakt: Photon upconversion via triplet-triplet annihilation (TTA-UC) provides a pathway to overcoming the thermodynamic efficiency limits in single-junction solar cells by allowing the harvesting of sub-bandgap photons. Here, we use mixed halide perovskite nanocrystals (CsPbX 3 , X = Br/I) as triplet sensitizers, with excitation transfer to 9,10-diphenylanthracene (DPA) and/or 9,10-bis[(triisopropylsilyl)ethynyl]anthracene (TIPS-An) which act as the triplet annihilators. We observe that the upconversion efficiency is five times higher with the combination of both annihilators in a composite system compared to the sum of the individual single-acceptor systems. Our work illustrates the importance of using a composite system of annihilators to enhance TTA upconversion, demonstrated in a perovskite-sensitized system, with promise for a range of potential applications in light-harvesting, biomedical imaging, biosensing, therapeutics, and photocatalysis.
Databáze: MEDLINE