Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Default user image.

Mohamed Abdellah

Researcher

Default user image.

Photodetector Based on Spontaneously Grown Strongly Coupled MAPbBr3/N-rGO Hybrids Showing Enhanced Performance

Author

  • Yingying Tang
  • Mingli Liang
  • Minwei Zhang
  • Alireza Honarfar
  • Xianshao Zou
  • Mohamed Abdellah
  • Tönu Pullerits
  • Kaibo Zheng
  • Qijin Chi

Summary, in English

Recently, metal-halide perovskites have emerged as a candidate for optoelectronic applications such as photodetectors. However, the poor device performance and instability have limited their future commercialization. Herein, we report the spontaneous growth of perovskite/N-rGO hybrid structures using a facile solution method and their applications for photodetectors. In the hybrid structures, perovskites were homogeneously wrapped by N-rGO sheets through strong hydrogen bonding. The strongly coupled N-rGOs facilitate the charge carrier transportation across the perovskite crystals but also distort the surface lattice of the perovskite creating a potential barrier for charge transfer. We optimize the addition of N-rGO in the hybrid structures to balance interfacial structural distortion and the intercrystal conductivity. High-performance photodetection up to 3 × 104 A/W, external quantum efficiency exceeding 105%, and detectivity up to 1012 Jones were achieved in the optimal device with the weight ratio between perovskites and N-rGO to be 8:1.5. The underlying mechanism behind the optimal N-rGO addition ratio in the hybrids has also been rationalized via time-resolved spectroscopic studies as a reference for future applications.

Department/s

  • NanoLund
  • Chemical Physics

Publishing year

2020-01-08

Language

English

Pages

858-867

Publication/Series

ACS Applied Materials and Interfaces

Volume

12

Issue

1

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Theoretical Chemistry
  • Condensed Matter Physics

Keywords

  • hybrid material
  • hydrogen bonding
  • perovskite/N-rGO
  • photodetector
  • time-resolved spectroscopy

Status

Published

ISBN/ISSN/Other

  • ISSN: 1944-8244