Octadecylamine-functionalized single-walled carbon nanotubes for facilitating the formation of a monolithic perovskite layer and stable solar cells

Tiong, Vincent Tiing and Pham, Ngoc Duy and Wang, Teng and Zhu, Tianxiang and Zhao, Xinluo and Zhang, Yaohong and Shen, Qing and Bell, John and Hu, Linhua and Dai, Songyuan and Wang, Hongxia (2018) Octadecylamine-functionalized single-walled carbon nanotubes for facilitating the formation of a monolithic perovskite layer and stable solar cells. Advanced Functional Materials, 28 (10):1705545. ISSN 1616-301X


Abstract

Organic–inorganic lead halide perovskites have shown great future for application in solar cells owing to their exceptional optical and electronic properties. To achieve high‐performance perovskite solar cells, a perovskite light absorbing layer with large grains is desirable in order to minimize grain boundaries and recombination during the operation of the device. Herein, a simple yet efficient approach is developed to synthesize perovskite films consisting of monolithic‐like grains with micrometer size through in situ deposition of octadecylamine functionalized single‐walled carbon nanotubes (ODA‐SWCNTs) onto the surface of the perovskite layer. The ODA‐SWCNTs form a capping layer that controls the evaporation rate of organic solvents in the perovskite film during the postthermal treatment. This favorable morphology in turn dramatically enhances the short‐circuit current density of the perovskite solar cells and almost completely eliminates the hysteresis. A maximum power conversion efficiency of 16.1% is achieved with an ODA‐SWCNT incorporated planar solar cell using (FA0.83MA0.17)0.95Cs0.05Pb(I0.83Br0.17)3 as light absorber. Furthermore, the perovskite solar cells with ODA‐SWCNT demonstrate extraordinary stability with performance retention of 80% after 45 d stability testing under high humidity (60–90%) environment. This work opens up a new avenue for morphology manipulation of perovskite films and enhances the device stability using carbon material.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Research and Innovation Division (12 Jul 2012 -)
Faculty/School / Institute/Centre: Current - Research and Innovation Division (12 Jul 2012 -)
Date Deposited: 17 Sep 2020 23:51
Last Modified: 24 Sep 2020 06:11
Uncontrolled Keywords: grain growth; hysteresis; perovskite solar cells; single-walled carbon nanotubes
Fields of Research (2008): 03 Chemical Sciences > 0399 Other Chemical Sciences > 039999 Chemical Sciences not elsewhere classified
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3499 Other chemical sciences > 349999 Other chemical sciences not elsewhere classified
Identification Number or DOI: https://doi.org/10.1002/adfm.201705545
URI: http://eprints.usq.edu.au/id/eprint/39388

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