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Mesoporous SnO<sub>2</sub> Nanoparticle-Based Electron Transport Layer for Perovskite Solar Cells

Mesoporous SnO2 Nanoparticle-Based Electron Transport Layer for Perovskite Solar Cells

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ULLAH, Sami, Muhammad Faraz Ud DIN, Jafar KHAN KASI, Ajab KHAN KASI, Karol VEGSO, Mario KOTLAR, Matej MICUSIK, Matej JERGEL, Vojtech NADAZDY, Azhar FAKHARUDDIN, 2022. Mesoporous SnO2 Nanoparticle-Based Electron Transport Layer for Perovskite Solar Cells. In: ACS Applied Nano Materials. ACS Publications. 5(6), pp. 7822-7830. eISSN 2574-0970. Available under: doi: 10.1021/acsanm.2c00840

@article{Ullah2022Mesop-57972, title={Mesoporous SnO2 Nanoparticle-Based Electron Transport Layer for Perovskite Solar Cells}, year={2022}, doi={10.1021/acsanm.2c00840}, number={6}, volume={5}, journal={ACS Applied Nano Materials}, pages={7822--7830}, author={Ullah, Sami and Din, Muhammad Faraz Ud and Khan Kasi, Jafar and Khan Kasi, Ajab and Vegso, Karol and Kotlar, Mario and Micusik, Matej and Jergel, Matej and Nadazdy, Vojtech and Fakharuddin, Azhar} }

Vegso, Karol Kotlar, Mario Mesoporous SnO<sub>2</sub> Nanoparticle-Based Electron Transport Layer for Perovskite Solar Cells Din, Muhammad Faraz Ud 2022-07-08T08:35:12Z Fakharuddin, Azhar Khan Kasi, Ajab Kotlar, Mario Jergel, Matej Ullah, Sami Khan Kasi, Jafar Fakharuddin, Azhar A perovskite solar cell (PSC) featuring a mesoporous architecture can facilitate perovskite layer formation over a large area via increasing the number of heterogeneous nucleation sites. The morphology of the electron transport layer (ETL) and its interface with the perovskite layer is one of the key factors to boost the performance of a PSC. Tin dioxide (SnO<sub>2</sub>) is considered as a promising ETL in PSCs owing to its high carrier mobility, good transmittance, deep conduction band level, and efficient photoelectron extraction. Generally, the mesoporous SnO<sub>2</sub> (m-SnO<sub>2</sub>) ETL has a higher surface-to-volume ratio compared to a compact SnO2 layer. Herein, we report on an m-SnO<sub>2</sub> ETL prepared by anodizing a metallic tin film on a fluorine-doped tin oxide (FTO) substrate in NaOH solution under an ambient atmosphere. In particular, we developed a bilayer architecture of the m-SnO<sub>2</sub> ETL based on the fabrication of two consecutive m-SnO<sub>2</sub> layers. The morphology of each layer was controlled by varying the anodization voltage and time at a constant solution concentration during the growth process. This unique approach enabled the deposition of an m-SnO<sub>2</sub> ETL with sufficient coverage of the FTO substrate, which is difficult to achieve with a single layer of m-SnO<sub>2</sub>. In particular, the scanning electron and atomic force microscopy analyses confirmed that the m-SnO<sub>2</sub> layer covers completely the FTO substrate. The device fabricated with this bilayer m-SnO<sub>2</sub> ETL achieved a 27% improvement in power conversion efficiency compared to that with a single layer of m-SnO<sub>2</sub>. Din, Muhammad Faraz Ud Micusik, Matej Jergel, Matej Ullah, Sami Khan Kasi, Jafar Khan Kasi, Ajab Nadazdy, Vojtech 2022 2022-07-08T08:35:12Z Vegso, Karol Micusik, Matej Nadazdy, Vojtech eng

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