Electrically Sorted Single-Walled Carbon Nanotubes-Based Electron Transporting Layers for Perovskite Solar Cells
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Yu, LePing
Tawfik, Sherif Abdulkader
Spencer, Michelle JS
Shaw, Paul E
Batmunkh, Munkhbayar
Shapter, Joseph G
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Abstract
Incorporation of as prepared single-walled carbon nanotubes (SWCNTs)into the electron transporting layer (ETL)is an effective strategy to enhance the photovoltaic performance of perovskite solar cells (PSCs). However, the fundamental role of the SWCNT electrical types in the PSCs is not well understood. Herein, we prepared semiconducting (s-)and metallic (m-)SWCNT families and integrated them into TiO2 photoelectrodes of the PSCs. Based on experimental and theoretical studies, we found that the electrical type of the nanotubes plays an important role in the devices. In particular, the mixture of s-SWCNTs and m-SWCNTs (2:1 w/w)-based PSCs exhibited a remarkable efficiency of up to 19.35%, which was significantly higher than that of the best control cell (17.04%). In this class of PSCs, semiconducting properties of s-SWCNTs play a critical role in extracting and transporting electrons, whereas m-SWCNTs provide high conductance throughout the electrode.
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iScience
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14
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© 2019 The Author(s). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
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Chemical sciences
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
Energy Materials
Materials Science
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Bati, ASR; Yu, L; Tawfik, SA; Spencer, MJS; Shaw, PE; Batmunkh, M; Shapter, JG, Electrically Sorted Single-Walled Carbon Nanotubes-Based Electron Transporting Layers for Perovskite Solar Cells, iScience, 2019, 14, pp. 100112