Porous Single-Wall Carbon Nanotube Templates Decorated with All-inorganic Perovskite Nanocrystals for Ultraflexible Photodetectors

Chandrasekar Perumal Veeramalai, Shengyi Yang*, Jinquan Wei, Muhammad Sulaman, Ruonan Zhi, Muhammad Imran Saleem, Yi Tang, Yurong Jiang, Bingsuo Zou

*Corresponding author for this work

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Abstract

As an inevitable optoelectronic material with unique properties, halide perovskites have attracted increasing attention in recent years. Meanwhile, the hybridization of nanostructured perovskites with one-dimensional (1D) or two-dimensional (2D) functional materials has exhibited unique applications in nanotechnology. In this communication, a highly conducting porous single-wall carbon nanotube (p-SWCNT) template decorated with phase-pure CsPbBr3 nanocrystals by a simple solution-phase technique was demonstrated, and the ultraflexible photodetector Au/p-SWCNT:CsPbBr3/Au showed high sensitivity even in a highly bending state. Also, the mechanism of wetting CsPbBr3 along the p-SWCNT and the detailed fabrication process for the ultraflexible photodetectors were highlighted. The direct contact (in situ) on the p-SWCNT by crystallization of the perovskite precursor can effectively enhance the charge transfer at their interface. At an applied bias of +5 V, the optimized photodetector Au/p-SWCNT:CsPbBr3/Au exhibits a maximum photoresponsivity of 41.0 AW-1 with a specific detectivity of 1.67 × 1012 Jones under an incident 232 μW/cm2 520 nm illumination. In addition, it exhibits excellent mechanical and electrical properties even under high strain (i.e., bending angle up to -17°) and recovers the original performance after repeated bending cycles up to 1000 times. Our experimental results showed that such hybrid materials provide a promising method for rigid and flexible optoelectronic devices.

Original languageEnglish
Pages (from-to)459-467
Number of pages9
JournalACS Applied Nano Materials
Volume3
Issue number1
DOIs
Publication statusPublished - 24 Jan 2020

Keywords

  • CsPbBr
  • flexible photodetector
  • inorganic perovskite nanocrystals
  • porous single-wall carbon nanotube (p-SWCNT)
  • visible light photodetector

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Perumal Veeramalai, C., Yang, S., Wei, J., Sulaman, M., Zhi, R., Saleem, M. I., Tang, Y., Jiang, Y., & Zou, B. (2020). Porous Single-Wall Carbon Nanotube Templates Decorated with All-inorganic Perovskite Nanocrystals for Ultraflexible Photodetectors. ACS Applied Nano Materials, 3(1), 459-467. https://doi.org/10.1021/acsanm.9b02051