Supramolecular organic-inorganic domains integrating fullerene-based acceptors with polyoxometalate-bis-pyrene tweezers for organic photovoltaic applications

A strategy to improve organic photovoltaics, and to enhance the device efficiency, builds on the design of interfacial layered (IFL) materials implementing the performance of the photoactive acceptor/donor system. A novel IFL blend has been engineered by a supramolecular organic-inorganic heterojunc...

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Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2021-11, Vol.9 (45), p.1629-16297
Main Authors: Giancane, Gabriele, Bettini, Simona, Valli, Ludovico, Bracamonte, Victoria, Carraro, Mauro, Bonchio, Marcella, Prato, Maurizio
Format: Article
Language:English
Subjects:
Butyric acid
Ferroelectricity
Fullerenes
Heterojunctions
Langmuir-Blodgett films
Open circuit voltage
Photovoltaic cells
Polyoxometallates
Solar cells
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Summary:A strategy to improve organic photovoltaics, and to enhance the device efficiency, builds on the design of interfacial layered (IFL) materials implementing the performance of the photoactive acceptor/donor system. A novel IFL blend has been engineered by a supramolecular organic-inorganic heterojunction integrating polyoxometalate-bis-pyrene ( pyrPOM ) receptors that can selectively bind fullerene-based acceptors through π-π interactions and in particular the most used phenyl-C61-butyric acid methyl ester ( PCBM ) PCBM . The resulting pyrPOM @ PCBM IFL, assembled by means of the Langmuir-Blodgett approach, has been fully characterized both in solution and on solid supports by means of the Langmuir-Schaefer method, featuring a high dielectric function, good polarizability and piezo-responsive behavior, which suggest ferroelectric properties. An organic solar cell is realized interposing the IFL between poly(3-hexylthiophene) (P3HT) as polymer donor and the PCBM acceptor layers, thus enhancing the open circuit voltage of the solar device by about 34% under an applied bias of ±5 V. Polyoxometalate-bis-pyrene receptors for phenyl-C61-butyric acid methyl ester (PCBM) provide an interfacial layer (IFL) material enhancing the open circuit voltage of the organic photovoltaic device of about 34% under applied bias of ±5 V.
ISSN:2050-7526
2050-7534
DOI:10.1039/d1tc03148a