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@article{1746796, author = {Mohammed, Mustafa K. A. and Shekargoftar, Masoud}, article_location = {Cambridge}, article_number = {2}, doi = {http://dx.doi.org/10.1039/d0se01493a}, keywords = {Zinc Oxide}, language = {eng}, issn = {2398-4902}, journal = {Sustainable Energy and Fuels}, title = {Surface treatment of ZnO films with carbon nanotubes for efficient and stable perovskite solar cells}, url = {https://doi.org/10.1039/D0SE01493A}, volume = {5}, year = {2021} }
TY - JOUR ID - 1746796 AU - Mohammed, Mustafa K. A. - Shekargoftar, Masoud PY - 2021 TI - Surface treatment of ZnO films with carbon nanotubes for efficient and stable perovskite solar cells JF - Sustainable Energy and Fuels VL - 5 IS - 2 SP - 540-548 EP - 540-548 PB - Royal Society of Chemistry SN - 23984902 KW - Zinc Oxide UR - https://doi.org/10.1039/D0SE01493A N2 - Organohalide lead perovskites (PVKs) are among the leading materials for the fabrication of high-efficiency and low-cost photovoltaic devices. Deposition of a suitable electron transport layer (ETL) plays a pivotal role in the manufacturing of perovskite solar cells (PSCs). Among all reported ETLs, zinc oxide (ZnO) has not been developed properly compared with its counterparts such as TiO2 and SnO2. In this work, we fabricated PSCs based on low-temperature solution-processed ZnO nanoparticles under ambient conditions. The degradation of PVK films on the ZnO ETL has been widely reported in the literature. We demonstrate that the localization of positive ions resulting from hydroxyl groups (-OH) present at the ZnO surface is a reason for this issue. In order to deactivate these groups, we treated the surface of the ZnO ETL with carbon nanotubes (CNTs) before the deposition of the PVK film. We found that CNTs modify the ZnO surface and stop the potential reaction between the ZnO and PVK films. The results demonstrate that the CNT modification of ZnO resulted in a PVK film with larger grains without any pinholes. Upon incorporation of CNTs into our devices, we improved the power conversion efficiency of the PSC from 15.05% to 18.79%, possibly due to the higher quality of the PVK film and improved charge extraction properties. Most importantly, PSCs based on the ZnO/CNT ETL showed better ambient and thermal stability compared to the reference PSCs. ER -
MOHAMMED, Mustafa K. A. and Masoud SHEKARGOFTAR. Surface treatment of ZnO films with carbon nanotubes for efficient and stable perovskite solar cells. \textit{Sustainable Energy and Fuels}. Cambridge: Royal Society of Chemistry, 2021, vol.~5, No~2, p.~540-548. ISSN~2398-4902. Available from: https://dx.doi.org/10.1039/d0se01493a.
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