S. A. Kuklin, S. V. Safronov, O. Yu. Fedorovskii, E. A. Khakina, L. V. Kulik, D. E. Utkin, L. A. Frolova, P. A. Troshin, A. R. Khokhlov, “New small-molecular benzimidazole derivatives for photovoltaics: Synthesis, optical and electrochemical properties and application in perovskite solar cells”, Mendeleev Commun., 2023, Volume 33, Issue 3,Pages <nobr>306

This article is cited in 3 papers

Communications

New small-molecular benzimidazole derivatives for photovoltaics: Synthesis, optical and electrochemical properties and application in perovskite solar cells

S. A. Kuklin^ab, S. V. Safronov^a, O. Yu. Fedorovskii^a, E. A. Khakina^a, L. V. Kulik^c, D. E. Utkin^d, L. A. Frolova^b, P. A. Troshin^b, A. R. Khokhlov^a

^a A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russian Federation
^b Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation
^c V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
^d A.V. Rzhanov Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation

Abstract: New small molecule photovoltaic materials containing benzimidazole fragment were prepared by cross-coupling of the corresponding 1-bromo-4-(imidazol-2-yl)benzenes with multiborylated/stannylated polycyclic (het)arenes. Energies of HOMO/LUMO levels were calculated from cyclic voltammetry and UV/VIS spectroscopy data and are within the ranges –5.27... –5.73 and –2.33...–2.89 eV, respectively. Solar cells based on three different perovskites as light absorbing layers and compound SM7 as electron transporting material demonstrated power conversion efficiency values up to 10.78% without doping additives or perovskite engineering.

Keywords: benzimidazole derivatives, cross-coupling, small molecules, perovskite, solar cells, electron transfer materials, power conversion efficiency.

Language: English

DOI: 10.1016/j.mencom.2023.04.003

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