1D-2D Synergistic MXene-Nanotubes Hybrids for Efficient Perovskite Solar Cells

Abdulaziz S R Bati; Mengmeng Hao; Thomas J Macdonald; Munkhbayar Batmunkh; Yusuke Yamauchi; Lianzhou Wang; Joseph G Shapter

doi:10.1002/smll.202101925

1D-2D Synergistic MXene-Nanotubes Hybrids for Efficient Perovskite Solar Cells

Small. 2021 Aug;17(32):e2101925. doi: 10.1002/smll.202101925. Epub 2021 Jul 2.

Authors

Abdulaziz S R Bati^{1

2}, Mengmeng Hao^{1

3}, Thomas J Macdonald⁴, Munkhbayar Batmunkh⁵, Yusuke Yamauchi^{1

3

6}, Lianzhou Wang^{1

3}, Joseph G Shapter¹

Affiliations

¹ Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia.
² Centre for Organic Photonics & Electronics, School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia.
³ School of Chemical Engineering, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia.
⁴ Department of Chemistry and Centre for Processable Electronics, Imperial College London, London, W12 0BZ, United Kingdom.
⁵ Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast, Queensland, 4222, Australia.
⁶ JST-ERATO Yamauchi Materials Space-Tectonics Project and International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.

PMID: 34213834
DOI: 10.1002/smll.202101925

Abstract

Incorporation of 2D MXenes into the electron transporting layer (ETL) of perovskite solar cells (PSCs) has been shown to deliver high-efficiency photovoltaic (PV) devices. However, the ambient fabrication of the ETLs leads to unavoidable deterioration in the electrical properties of MXene due to oxidation. Herein, sorted metallic single-walled carbon nanotubes (m-SWCNTs) are employed to prepare MXene/SWCNTs composites to improve the PV performance of PSCs. With the optimized composition, a power conversion efficiency of over 21% is achieved. The improved photoluminescence and reduced charge transfer resistance revealed by electrochemical impedance spectroscopy demonstrated low trap density and improved charge extraction and transport characteristics due to the improved conductivity originating from the presence of nanotubes as well as the reduced defects associated with oxygen vacancies on the surface of the SnO₂ . The MXene/SWCNTs strategy reported here provides a new avenue for realizing high-performance PSCs.

Keywords: 2D materials; MXenes; carbon nanotubes; perovskite solar cells.

Abstract

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