S. A. Kuklin, S. V. Safronov, A. S. Peregudov, E. A. Khakina, M. M. Babaskina, M. G. Ezernitskaya, O. Yu. Fedorovskii, E. S. Kobeleva, L. V. Kulik, L. A. Frolova, P. A. Troshin, A. R. Khokhlov, “New ethynediyl-linked perylene diimide/2,1,3-benzothiadiazole conjugates as electron transporting materials for perovskite solar cells”, Mendeleev Commun., 2024, Volume 34, Issue 3,Pages <nobr>316

Communications

New ethynediyl-linked perylene diimide/2,1,3-benzothiadiazole conjugates as electron transporting materials for perovskite solar cells

S. A. Kuklin^ab, S. V. Safronov^a, A. S. Peregudov^a, E. A. Khakina^ac, M. M. Babaskina^ac, M. G. Ezernitskaya^a, O. Yu. Fedorovskii^a, E. S. Kobeleva^d, L. V. Kulik^d, L. A. Frolova^b, P. A. Troshin^be, 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 National Research University Higher School of Economics (HSE University), Moscow, Russian Federation
^d V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
^e Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, China

Abstract: Two new compounds BT-PDI and BT2-PDI2 were synthesized by the Sonogashira reaction between 4,7-diethynyl-2,1,3- benzothiadiazole and bromoperylene diimide derivatives. The HOMO and LUMO energy levels estimated by UV-VIS spectroscopy and cyclic voltammetry were –5.66/–3.75 and –5.33/–3.41 eV for the BT-PDI and BT2-PDI2, respectively; both compounds form high-quality and smooth coatings on the perovskite surface with the root mean square roughness values 5.95 and 7.80 nm for the BT-PDI and BT2-PDI2 films, respectively; the electron mobilities in the solid films estimated by photo-CELIV method are equal to 5.0 × 10^–5 and 3.0 × 10^–5 cm² V^–1 s^–1, respectively. Both compounds being tested as electron transport layers in perovskite solar cells showed efficiency values of 14.44 and 13.01% for BT-PDI and BT2-PDI2, respectively.

Keywords: Sonogashira reaction, perylene diimide, 2,1,3-benzothiadiazole conjugates, alkynes, electron transport materials, perovskite solar cells, power conversion efficiency.

Language: English

DOI: 10.1016/j.mencom.2024.04.003

	*Supplementary materials:*
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