Novel (X-DADAD)n polymers with fluorene and phenylene as promising semiconductor materials for organic and perovskite solar cells
Ilya Kuznetsov a, Petr Kuznetsov a, Klim Zakirov b, Maxim Sideltsev a, Alexander Akkuratov a
a Institute for Problems of Chemical Physics, Russian Academy of Sciences (IPCP RAS), 1 Academician Semenov Avenue, 142432 Chernogolovka, Moscow Region, Russian Federation
b Moscow State University, Faculty of Fundamental Physical and Chemical Engineering, GSP-1, 1 Leninskiye Gory, 119991 Moscow, Russian Federation
Proceedings of International Online Conference on Hybrid Materials and Optoelectronic Devices (HYBRIDOE21)
Online, Spain, 2021 December 15th - 17th
Organizers: Jinwei Gao, Hua Yu, Dewei Zhao, Haizheng Zhong, Hairen Tan and Xueqing Xu
Poster, Ilya Kuznetsov, 021
Publication date: 3rd December 2021

Organic (OSCs) and perovskite (PSCs) solar cells are considered as emerging next generation photovoltaic (PV) technologies, which provide high solar energy-to-electricity power conversion efficiencies with potentially low-cost [1]. The impressive efficiencies exceeding 25% and 18% were recently reported for state-of-the-art PSCs and OSCs, respectively, which bring them close to successful commercial (e.g. silicon-based) PV technologies [1,2]. Further improvement in the performance of both types of solar cells as well increase in their operation stability require rational design of novel semiconductor materials and interface engineering in the devices.

The donor-acceptor (D-A) conjugated polymers are promising absorber materials for organic solar cells due to their tunable optoelectronic properties, solubility, and self-organization behavior [3].

In this work, we report the synthesis of highly soluble (X-DADAD)n polymers by using X blocks loaded with bulky and branched solubilizing alkyl substituents. Two novel dialkoxyphenylene- and fluorene-based conjugated polymers were designed and explored as electron donor materials in OSCs as well as hole-transport materials in PSCs. Encouraging results were obtained for PSCs when using fluorene-containing polymer featuring this polymer as promising hole-transport material for perovskite photovoltaics.

This work was supported by the Russian Foundation for Basic Research (project No. 20-03-00309). General support was also provided by the Ministry of Science and Higher Education of the Russian Federation within the projects №AAAA-A19-119101590029-0. We acknowledge the participation of Ustinova M.I. in the characterization of perovskite solar cells. The authors also gratefully thank Dr. Troshin P.A. for providing the equipment of FMEM laboratory at IPCP RAS. The work has been performed using the equipment of the Multi-User Analytical Center of IPCP RAS

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