Carbon-based perovskite solar cells (C-PSCs) are attracting considerable attention in the field of photovoltaic technology due to their potential for cost-effective production and exceptional long-term stability. However, a key barrier to their growth is the limited power conversion efficiency (PCE). This study demonstrates an approach to improve the PCE of C-PSCs by introducing a hybrid TiO2+TiAcAc/SnO2 electron transporting layer through a low-temperature process (≤150°C). The technique involves incorporating titanium diisopropoxide bis(acetylacetonate) (TiAcAc) into TiO2 and modifying the interface between the electron transporting layer (ETL) and perovskite by using an ultrathin SnO2 film. The addition of TiAcAc effectively closes the voids among the TiO2 nanoparticles, resulting in a more compact TiO2 coating. Consequently, the inclusion of TiAcAc in TiO2 leads to an augmentation of the open circuit voltage (VOC) to 1.10V. Moreover, an ultrathin SnO2 film is applied to passivate the interface between TiO2+TiAcAc and the perovskite layers. This results in an increased fill factor (FF) by reducing interface defects. Therefore, the device with an active area of 0.09 cm2, utilizing a TiO2+TiAcAc/SnO2 ETL and fabricated under ambient conditions with a relative humidity of 35%RH, achieves a maximum PCE of 16.00%, with an open-circuit voltage (VOC) of 1.09V, a short-circuit current density (JSC) of 20.34 mA cm-2, and a fill factor (FF) of 72.00%. It is expected that this work will offer an effective approach to raise the photovoltaic performance of the C-PSCs.
| Published in | Abstract Book of the 2024 International PhD School on Perovskite PV |
| Page(s) | 48-48 |
| Creative Commons |
This is an Open Access abstract, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Carbon-based Perovskite Solar Cells, Electron Transporting Layer, Tio2, TiAcAc, SnO2
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