Carbon nanotubes in TiO2 nanofiber photoelectrodes for high-performance perovskite solar cells

Batmunkh, M., Macdonald, T.J., Shearer, C.J., Bat-Erdene, M., Wang, Y., Biggs, M.J. ORCID: 0000-0002-2131-3677, Parkin, I.P., Nann, T. and Shapter, J.G., 2017. Carbon nanotubes in TiO2 nanofiber photoelectrodes for high-performance perovskite solar cells. Advanced Science, 4 (4): 1600504. ISSN 2198-3844

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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%.

Item Type: Journal article
Publication Title: Advanced Science
Creators: Batmunkh, M., Macdonald, T.J., Shearer, C.J., Bat-Erdene, M., Wang, Y., Biggs, M.J., Parkin, I.P., Nann, T. and Shapter, J.G.
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Date: April 2017
Volume: 4
Number: 4
ISSN: 2198-3844
Identifiers:
NumberType
10.1002/advs.201600504DOI
Divisions: Schools > School of Science and Technology
Depositing User: Linda Sullivan
Date Added: 25 Apr 2018 08:44
Last Modified: 25 Apr 2018 08:44
URI: http://irep.ntu.ac.uk/id/eprint/33319

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