Hole-transporting interlayers based on pyrazine-containing conjugated polymers for perovskite solar cells

文献情報

出版日 2023-11-09

DOI 10.1039/D3CP04533A

インパクトファクター 3.676

著者

D. S. Zamoretskov, I. E. Kuznetsov, M. M. Tepliakova, D. K. Sagdullina, V. G. Kurbatov, A. G. Nasibulin, A. V. Akkuratov

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要旨

Hybrid organic–inorganic perovskite solar cells (PSCs) have drawn great attention in the past decade due to the rapid growth of their power conversion efficiency (PCE) and the advantage of their low-cost fabrication. The hole-transport materials (HTMs) play a crucial role in achieving high efficiency and operational stability of PSCs. In this work, we report the synthesis of two novel conjugated polymers by coupling of the alkylsilyl-substituted benzo[1,2-b:4,5-b′]dithiophene unit with the thiophene-bridged pyrazine block and their investigation as dopant-free HTMs in n–i–p PSCs. The devices with polymer PBPyT-ex (poly[(4,8-bis(5-(triisopropylsilyl)thiophen-2-yl)-2,6-benzo[1,2-b:4,5-b′]dithiophene)-alt-5,5′-(2,5-bis(4-(2-ethylhexyl)thiophen-2-yl)pyrazine)]) demonstrate PCEs up to 17.5%, outperforming the 14.9% efficiency of PSCs with PBPyT-in (poly[(4,8-bis(5-(triisopropylsilyl)thiophen-2-yl)-2,6-benzo[1,2-b:4,5-b′]dithiophene)-alt-5,5′-(2,5-bis(3-(2-ethylhexyl)thiophen-2-yl)pyrazine)]), which is attributed to the difference in the quality of HTM films. The results obtained feature the combination of pyrazine, thiophene and benzodithiophene units as a successful example of polymeric HTM backbone design for PSCs with encouraging efficiency and high operational stability over 1500 h under continuous illumination.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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