New small-molecular benzimidazole derivatives for photovoltaics: synthesis, optical and electrochemical properties and application in perovskite solar cellsстатья
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Дата последнего поиска статьи во внешних источниках: 26 июня 2024 г.
Аннотация:New small molecule photovoltaic materials containing benzimidazole fragment were prepared by cross-coupling of the corresponding 1-bromo-4-(imidazol-2-yl)benzenes withmultiborylated/stannylated polycyclic (het)arenes. Energies of HOMO/LUMO levels were calculated from cyclicvoltammetry 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 lightabsorbing layers and compound SM7 as electron transporting material demonstrated power conversion efficiency values up to 10.78% without doping additives or perovskiteengineering.