Semiconducting carbon nanotubes as crystal growth templates and grain bridges in perovskite solar cells

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Grain size control and boundary passivation of perovskite films are the key to obtaining efficient perovskite solar cells. In order to accomplish both goals, semiconducting single-walled carbon nanotubes are added to perovskite films as additives, functioning as both the crystal growth templates and charge bridges between the perovskite grains. The resulting perovskite films display more uniform and larger crystal grains compared with conventional films owing to the long and flexible single-walled carbon nanotubes, retarding the crystal growth and functioning as the cross-linker between perovskite grains. In addition, sodium deoxycholates attached on the carbon nanotubes passivated the grain boundaries by forming Lewis adducts. Thanks to the improved quality of the photoactive layers by using semiconducting carbon nanotubes, a power conversion efficiency of 19.5% was obtained which is higher than 18.1% of reference devices with no additives.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2019-06
Language
English
Article Type
Article
Citation

JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.21, pp.12987 - 12992

ISSN
2050-7488
DOI
10.1039/c9ta02629k
URI
http://hdl.handle.net/10203/263109
Appears in Collection
MS-Journal Papers(저널논문)
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