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    Metal oxide electron transport materials for perovskite solar cells: a review
    (Springer Science and Business Media Deutschland GmbH, 2021) Valadi, Kobra; Taheri-Ledari, Reza; Akın, Seçkin; Maleki, Ali; Shalan, Ahmed Esmail
    Solar electricity is an unlimited source of sustainable fuels, yet the efficiency of solar cells is limited. The efficiency of perovskite solar cells improved from 3.9% to reach 25.5% in just a few years. Perovskite solar cells are actually viewed as promising by comparison with dye-sensitized solar cells, organic solar cells, and the traditional solar cells made of silicon, GaAs, copper indium gallium selenide (CIGS), and CdTe. Here, we review bare and doped metal oxide electron transport layers in the perovskite solar cells. Charge transfer layers have been found essential to control the performance of perovskite solar cells by tuning carrier extraction, transportation, and recombination. Both electron and hole transport layers should be used for charge separation and transport. TiO2 and 2,2′,7,7′-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene are considered as the best electron and hole transport layers. Metal oxide materials, either bare or doped with different metals, are stable, cheap, and effective.
  • Küçük Resim
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    Neodymium and praseodymium doped perovskite materials for highly stable CuInS2-hole-transport layer-based perovskite solar cells
    (John Wiley and Sons Inc, 2021) Taheri-Ledari, Reza; Gharibi, Saideh; Maleki, Ali; Akın, Seçkin; Shalan, Ahmed Esmail
    Organic–inorganic hybrid perovskite (PSK) technology is a new class of solar cells which have attracted great attention due to the rapid progress in photovoltaic performance and ease of processing pathways. Herein, a novel method for the enhancement of the photovoltaic and photoelectric properties of the triple-cation Cs/MA/FA PSK layer is presented. For this purpose, two lanthanide ions, including praseodymium (Pr3+) and neodymium (Nd3+), are prepared in nanoscale and incorporated into the PSK structure as B-site dopants, which results in an improved crystallinity, prolonged charge-recombination process, and increased light harvesting while yielding higher efficiency. Moreover, inorganic copper indium sulfide (CuInS2) hole-transport layer is used instead of the high cost and organic spiro-OMeTAD to reduce production costs and enhance the device stability of PSK photovoltaics. Ultimately, a notable efficiency of 15.75% with a significant short-circuit current density of 24.54 mA cm−2 is achieved by the utilization of PSK + Pr layer in a large-scale (1.4 × 1.4 cm2) perovskite solar cell. More importantly, the devices maintain 94.3% of their initial performance for 10 day/night cycles under ambient conditions.