Barbero, N.

Barolo, C.

Desoky, MOHAMED MAGDY HASSAN

Quagliotto, P.

Viscardi, G.

English

Institutional Research Information System University of Turin

Synthesis of dopant-free polymers for perovskite solar cells M.M.H. Desoky, P. Quagliotto, N. Barbero, C. Barolo, and G. ViscardiDipartimento di Chimica, Università degli Studi di Torino, via P. Giuria 7, Torino, 10125, ItalyEmail: mohmed.desoky@gmail.comThe increasing world energy demanding makes compulsory the search of energy sources alternative to fossil fuels. Among alternative energy source, the solar energy is green, renewable and not exhaustible. Perovskite Solar Cells (PSC), which rose in efficiency from the 3.2% (2012) to 22-23% in only 5-6 years[1], are the new frontier of the photovoltaic research. The perovskite crystals are the core of the device, giving easy charge separation and high charge mobility. The two sides of the perovskite layer are covered with an Electron Transport Material (e.g. TiO2, n-doped semiconductors…) and a Hole Transport Material which drain charges efficiently. Unfortunately, perovskites show instability towards moisture, which rapidly deteriorates the device performances. The use of polymeric HTMs layers on one perovskite side seems to overcome those problems, granting a good stability increase, since the optimal filming properties of hydrophobic polymers.Most HTMs need to be doped to show good conductivity levels, useful for PSC cells, but doping agents are detrimental for cell stability since they are hygroscopic and, through them, water can reach the perovskite layer. Recently, we prepared P3HT and PTAA but now we are interested into polymeric HTMs showing an inherent high conductivity, which became the next HTM research topic, the “dopant-free” conductive polymers [2]. To prepare a promising dopant-free polymer, a donor-acceptor monomer (1) was prepared by Suzuki coupling on a dibromoaldehyde derivative, followed by Knoevenagel condensation with malonitrile under microwaves. The final polymerization using FeCl3 gave a red colored polymer (2).Besides usual synthesis, the synthesis of intermediates and final polymers will be also addressed in micellar media, a Green Chemistry technique [3]. Figure 1: Synthesis of the donor-acceptor conductive polymer.[1] M. Green and A.Ho-Baillie, ACS Lett. 2, (2017) 822-830. [2] W. Zhou, Z. Wen, and P. Gao Adv. Energy Mater. (2018) 1702512. [3] a) B. H. Lipshutz, J. Org. Chem. 82, (2017), 2806-2816; b) P. Quagliotto, N. Barbero, C. Barolo, R. Buscaino, P. Carfora, S. Prosperini, and G. Viscardi Dyes and Pigments 137, (2017) 468-479.

Synthesis of dopant-free polymers for perovskite solar cells

https://iris.unito.it/bitstream/2318/1705615/1/ABS_Desoky.Mohamed%20Magdy%20Hassan%20%284%29.doc

Synthesis of dopant-free polymers for perovskite solar cells

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