Carbon Nanotubes in TiO2 Nanofiber Photoelectrodes for High-Performance Perovskite Solar Cells

Munkhbayar Batmunkh, Thomas Macdonald, Cameron Shearer, Munkhjargal Bat-Erdene, Yun Wang, Mark Biggs, Ivan Parkin, Thomas Nann, Joseph Shapter

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    43 Citations (Scopus)

    Abstract

    1D semiconducting oxides are unique structures that have been widely used for photovoltaic (PV) devices due to their capability to provide a direct pathway for charge transport. In addition, carbon nanotubes (CNTs) have played multifunctional roles in a range of PV cells because of their fascinating properties. Herein, the influence of CNTs on the PV performance of 1D titanium dioxide nanofiber (TiO2 NF) photoelectrode perovskite solar cells (PSCs) is systematically explored. Among the different types of CNTs, single-walled CNTs (SWCNTs) incorporated in the TiO2 NF photoelectrode PSCs show a significant enhancement (≈40%) in the power conversion efficiency (PCE) as compared to control cells. SWCNTs incorporated in TiO2 NFs provide a fast electron transfer within the photoelectrode, resulting in an increase in the short-circuit current (J sc) value. On the basis of our theoretical calculations, the improved open-circuit voltage (V oc) of the cells can be attributed to a shift in energy level of the photoelectrodes after the introduction of SWCNTs. Furthermore, it is found that the incorporation of SWCNTs into TiO2 NFs reduces the hysteresis effect and improves the stability of the PSC devices. In this study, the best performing PSC device constructed with SWCNT structures achieves a PCE of 14.03%.

    Original languageEnglish
    Article number1600504
    Pages (from-to)1600504-1-1600504-11
    Number of pages11
    JournalAdvanced Science
    Volume4
    Issue number4
    DOIs
    Publication statusPublished - 2017

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  • Cite this

    Batmunkh, M., Macdonald, T., Shearer, C., Bat-Erdene, M., Wang, Y., Biggs, M., Parkin, I., Nann, T., & Shapter, J. (2017). Carbon Nanotubes in TiO2 Nanofiber Photoelectrodes for High-Performance Perovskite Solar Cells. Advanced Science, 4(4), 1600504-1-1600504-11. [1600504]. https://doi.org/10.1002/advs.201600504