A one-step method to synthesize CH 3 NH 3 PbI 3 :MoS 2 nanohybrids for high-performance solution-processed photodetectors in the visible region

Perumal Veeramalai Chandrasekar, Shengyi Yang, Jinming Hu, Muhammad Sulaman, Muhammad Imran Saleem, Yi Tang, Yurong Jiang, Bingsuo Zou

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18 Citations (Scopus)

Abstract

A facile method to synthesize a CH 3 NH 3 PbI 3 : MoS 2 nanohybrid for high-performance solution-processed photodetectors is presented. The interfacial charge carriers transfer due to the existence of heterojunctions between the 2D MoS 2 nanosheet and perovskite cuboids are utilized to enhance the device performance. The dark current of the photodiode Au/CH 3 NH 3 PbI 3 : MoS 2 /Au was suppressed and its photocurrent was enhanced when compared to a pristine perovskite nanocrystal device Au/CH 3 NH 3 PbI 3 /Au. The lowest dark current of 0.34 × 10 -9 A was observed from the photodiode Au/CH 3 NH 3 PbI 3 : MoS 2 /Au and the photoresponsivity and photosensitivity increased from 312 mA W -1 to 696 mA W -1 and from 9.02 to 87.47, respectively, showing an enhancement of 123.1% and 869.7%. Also, the rising time and falling time were reduced from 73 ms to 50 ms and 60 ms to 16 ms, respectively, when compared to those for the pristine perovskite nanocrystal-based photodiode Au/CH 3 NH 3 PbI 3 /Au. Therefore, this method provides a simple and effective approach to synthesize 2D nanosheet blended organic-inorganic nanohybrids for application in optoelectronic devices.

Original languageEnglish
Article number085707
JournalNanotechnology
Volume30
Issue number8
DOIs
Publication statusPublished - 22 Feb 2019

Keywords

  • CH NH PbI perovskites
  • MoS nanosheets
  • dark current
  • solution-processed photodetector

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Chandrasekar, P. V., Yang, S., Hu, J., Sulaman, M., Saleem, M. I., Tang, Y., Jiang, Y., & Zou, B. (2019). A one-step method to synthesize CH 3 NH 3 PbI 3 :MoS 2 nanohybrids for high-performance solution-processed photodetectors in the visible region Nanotechnology, 30(8), Article 085707. https://doi.org/10.1088/1361-6528/aaf608