En route to sustainability: blend nanoparticles for water-processable active layer of organic solar cells

Autor: S. Zappia, a S. Destri, a A.M. Ferretti, b U. Giovanella, a G. Scavia, a V. Vohra.c
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: XXXVIII Convegno Nazionale della Divisione di Chimica Organica, Milano, 09-13/09/2018
info:cnr-pdr/source/autori:S. Zappia,a S. Destri,a A.M. Ferretti,b U. Giovanella,a G. Scavia,a V. Vohra.c/congresso_nome:XXXVIII Convegno Nazionale della Divisione di Chimica Organica/congresso_luogo:Milano/congresso_data:09-13%2F09%2F2018/anno:2018/pagina_da:/pagina_a:/intervallo_pagine
Popis: Water-processable nanoparticles (WPNPs) of semiconducting polymers received considerable attention for optoelectronic and biological applications due to their simple preparation method, and their tunable optical properties.1 WPNPs are appealing for optoelectronic devices such as organic photovoltaics (OPVs), organic light-emitting diodes, and organic field-effect transistors to address the morphology of the active layer, that is strictly related to device performances.2 Through the miniemulsion approach, WPNPs dispersion can be obtained using great amount of surfactants to ensure their stability. This approach allows for lowering the chlorinated solvent amount used in active layer fabrication reducing the environmental payback of devices, but the excess of surfactant has to be removed at the end of the process.3 Amphiphilic block copolymers (ABCPs) are a powerful tool to produce nanostructured or supramolecular objects with enhanced properties for electronics, optoelectronics, sensors and biotechnological applications because of their capability to self-assembly, influenced by the physico-chemical differences between the blocks, including the relative block length, block polarity, volume fraction, chain flexibility, etc.4 Here we reported about a series of ABCP, PCPDTBT-b-P4VP, recently investigated in our group. These polymers are constituted by a low band-gap copolymer, PCPDTBT as the rigid segment, and tailored segments of poly-4-vinylpyridine (P4VP). The rod block was studied as donor material in hybrid and organic devices, whilst P4VP is able to interact with acceptor materials, as fullerene derivatives.5 Taking advantage of hydrophilic behaviour of the coil, we studied the capability of PCPDTBT-b-P4VP to prepare WPNPs dispersion in aqueous medium through miniemulsion method, neat or in blend with fullerene derivatives, without use of surfactants avoiding purification steps. The so-obtained WPNPs were optically, morphologically (DLS, AFM, TEM) and electrically characterized, showing suitable properties for the preparation of active layers and they were tested in sustainable WPNP-based OPVs with good efficiencies.6 References: [1] F. Cicoira, C. Santato, Organic Electronics: Emerging Concepts and Technologies, 2013, Wiley-VCH Verlag GmbH & Co. KGaA. [2] X. Zhou, W. Belcher, P. Dastoor, Polymers, 2014, 6, 2832. [3] S. Zhang, L. Ye, H. Zhang, J. Hou, Materials Today, 2016, 19, 533. [4] B.D. Olsen, R.A. Segalman, Mater Sci Eng R, 2008, 62, 37. [5] S. Zappia, R. Mendichi, S. Battiato, G. Scavia, R. Mastria, F. Samperi, S. Destri, Polymer, 2015, 80, 245. [6] S. Zappia, G. Scavia, A.M. Ferretti, U. Giovanella, V. Vohra, S. Destri, Adv Sustainabl Syst, 2018, 2, 1700155
Databáze: OpenAIRE
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