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Issue 20, 2018
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Nb-doped amorphous titanium oxide compact layer for formamidinium-based high efficiency perovskite solar cells by low-temperature fabrication

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Abstract

Low-temperature processed perovskite solar cells (PSCs) were prepared using an amorphous niobium-doped titanium oxide (Nb/TiOx) film as a compact layer (CL) combined with a brookite TiO2 mesoporous layer. Nb concentration of 4% in amorphous TiOx CL was found to improve the photocurrent-voltage performances of formamidinium (FA) and methylammonium (MA)-mixed perovskite, (FAPbI3)0.85(MAPbBr3)0.15, and FA0.85Cs0.15PbI3 perovskite solar cells, which were fabricated on 100 °C and 130 °C-annealed TiOx CLs; these solar cells exhibited conversion efficiencies up to 19.1% and 19.8%, respectively. The Nb/TiOx-based FA0.85Cs0.15PbI3 perovskite cell obtained entirely by a low temperature process (130 °C or less) exhibited high stability against light soaking without encapsulation of the device.

Graphical abstract: Nb-doped amorphous titanium oxide compact layer for formamidinium-based high efficiency perovskite solar cells by low-temperature fabrication

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Publication details

The article was received on 19 Mar 2018, accepted on 23 Apr 2018 and first published on 24 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA02540A
Citation: J. Mater. Chem. A, 2018,6, 9583-9591

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    Nb-doped amorphous titanium oxide compact layer for formamidinium-based high efficiency perovskite solar cells by low-temperature fabrication

    Y. Numata, R. Ishikawa, Y. Sanehira, A. Kogo, H. Shirai and T. Miyasaka, J. Mater. Chem. A, 2018, 6, 9583
    DOI: 10.1039/C8TA02540A

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