Quasi-Two-Dimensional Halide Perovskite Single Crystal Photodetector

Kai Wang, Congcong Wu, Dong Yang, Yuanyuan Jiang, Shashank Priya

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The robust material stability of the quasi-two-dimensional (quasi-2D) metal halide perovskites has opened the possibility for their usage instead of three-dimensional (3D) perovskites. Further, devices based on large area single crystal membranes have shown increasing promise for photoelectronic applications. However, growing inch-scale quasi-2D perovskite single crystal membranes (quasi-2D PSCMs) has been fundamentally challenging. Here we report a fast synthetic method for synthesizing inch-scale quasi-2D PSCMs, namely (C4H9NH3)n(CH3NH3)n?1PbnI3n+1 (index n = 1, 2, 3, 4, and ?), and demonstrate their application in a single-crystal photodetector. A quasi-2D PSCM has been grown at the water-air interface where spontaneous alignment of alkylammonium cations and high chemical potentials enable uniform orientation and fast in-plane growth. Structural, optical, and electrical characterizations have been conducted as a function of quantum well thickness, which is determined by the index n. It is shown that the photodetector based on the quasi-2D PSCM with the smallest quantum well thickness (n = 1) exhibits a strikingly low dark current of ∼10-13 A, higher on/off ratio of ∼104, and faster response time in comparison to those of photodetectors based on quasi-2D PSCMs with larger quantum well thickness (n > 1). Our study paves the way toward the merging the gap between single crystal devices and the emerging quasi-2D perovskite materials.

Original languageEnglish (US)
Pages (from-to)4919-4929
Number of pages11
JournalACS nano
Volume12
Issue number5
DOIs
StatePublished - May 22 2018

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Photodetectors
Perovskite
halides
photometers
Single crystals
single crystals
Semiconductor quantum wells
membranes
Membranes
quantum wells
perovskites
Metal halides
photoelectronics
metal halides
Dark currents
Chemical potential
dark current
Merging
perovskite
Cations

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "The robust material stability of the quasi-two-dimensional (quasi-2D) metal halide perovskites has opened the possibility for their usage instead of three-dimensional (3D) perovskites. Further, devices based on large area single crystal membranes have shown increasing promise for photoelectronic applications. However, growing inch-scale quasi-2D perovskite single crystal membranes (quasi-2D PSCMs) has been fundamentally challenging. Here we report a fast synthetic method for synthesizing inch-scale quasi-2D PSCMs, namely (C4H9NH3)n(CH3NH3)n?1PbnI3n+1 (index n = 1, 2, 3, 4, and ?), and demonstrate their application in a single-crystal photodetector. A quasi-2D PSCM has been grown at the water-air interface where spontaneous alignment of alkylammonium cations and high chemical potentials enable uniform orientation and fast in-plane growth. Structural, optical, and electrical characterizations have been conducted as a function of quantum well thickness, which is determined by the index n. It is shown that the photodetector based on the quasi-2D PSCM with the smallest quantum well thickness (n = 1) exhibits a strikingly low dark current of ∼10-13 A, higher on/off ratio of ∼104, and faster response time in comparison to those of photodetectors based on quasi-2D PSCMs with larger quantum well thickness (n > 1). Our study paves the way toward the merging the gap between single crystal devices and the emerging quasi-2D perovskite materials.",
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Quasi-Two-Dimensional Halide Perovskite Single Crystal Photodetector. / Wang, Kai; Wu, Congcong; Yang, Dong; Jiang, Yuanyuan; Priya, Shashank.

In: ACS nano, Vol. 12, No. 5, 22.05.2018, p. 4919-4929.

Research output: Contribution to journalArticle

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T1 - Quasi-Two-Dimensional Halide Perovskite Single Crystal Photodetector

AU - Wang, Kai

AU - Wu, Congcong

AU - Yang, Dong

AU - Jiang, Yuanyuan

AU - Priya, Shashank

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