Issue 45, 2021

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

Abstract

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
06 jul 2021
Accepted
09 aug 2021
First published
10 aug 2021

J. Mater. Chem. C, 2021,9, 16290-16297

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

G. Giancane, S. Bettini, L. Valli, V. Bracamonte, M. Carraro, M. Bonchio and M. Prato, J. Mater. Chem. C, 2021, 9, 16290 DOI: 10.1039/D1TC03148A

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