Dagar, J;
Castro-Hermosa, S;
Lucarelli, G;
Zampetti, A;
Cacialli, F;
Brown, TM;
(2019)
Low-Temperature Solution-Processed Thin SnO2/Al2O3 Double Electron Transport Layers Toward 20% Efficient Perovskite Solar Cells.
IEEE Journal of Photovoltaics
, 9
(5)
pp. 1309-1315.
10.1109/JPHOTOV.2019.2928466.
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Abstract
We present planar perovskite solar cells incorporating thin SnO 2 /Al 2 O 3 double electron transport layers between the perovskite and an indium tin oxide bottom electrode. When measured under 1 sun illumination, we obtained a maximum power conversion efficiency (PCE) of 20.1% and a steady state efficiency of 17.8% for the best cell. These values were ~20%-30% higher in relative terms than those of cells with SnO 2 only (i.e., a maximum PCE of 15.3% and a steady state PCE of 14.9%). Insertion of the thin UV-irradiated solution-processed nanoparticle Al 2 O 3 interlayer effectively enhanced the wettability of the electron transport layer, provided enhanced interface area, as well as a lower work function, leading to improved charge extraction. Incorporation of an Al 2 O 3 layer between the perovskite and SnO 2 layers also improved the rectification ratios of the diodes as well as both series and shunt resistances. Our devices are fabricated using fully solution-processed transport and active semiconducting layers processed at low temperatures (≤150 °C).
| Type: | Article |
|---|---|
| Title: | Low-Temperature Solution-Processed Thin SnO2/Al2O3 Double Electron Transport Layers Toward 20% Efficient Perovskite Solar Cells |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JPHOTOV.2019.2928466 |
| Publisher version: | https://doi.org/10.1109/JPHOTOV.2019.2928466 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Electron transport layer, maximum power point tracking, planar perovskite solar cell (PSC), SnO2 layer, SnO2/Al2O3 double layer |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10083341 |
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