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Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits

Professor

Portrait of Tönu Pullerits; Photo: Kennet Ruona

CuInSe2 Quantum Dots Hybrid Hole Transfer Layer for Halide Perovskite Photodetectors

Author

  • Ruiqi Guo
  • Fei Huang
  • Kaibo Zheng
  • Tönu Pullerits
  • Jianjun Tian

Summary, in English

A novel hybrid hole transport layer (HTL) of CuInSe2 quantum dots (QDs)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was developed to enhance the performance of halide metal perovskite (MAPbI3)-based photodetectors. The introduction of CuInSe2 QDs not only improved the wettability of the PEDOT:PSS HTL for the growth of perovskite crystals but also facilitated the transportation of holes from the perovskite to the HTL. As a result, both responsivity and detectivity of the device were increased dramatically by CuInSe2 QDs hybrid HTL, showing excellent photoresponsivity of 240 mA/W, larger ratio of photocurrent density to dark current density of 4.1 × 106, fast on-off switching properties of <0.02 s, and remarkable detectivity values of 1.02 × 1013 Jones at 580 nm and above 5.01 × 1012 Jones over the visible light region without an external bias voltage. In addition, the photodetectors also showed excellent thermal stability in the range of 10-110 °C. Therefore, a unique design idea of a hole transport material would be an anticipated direction for efficient halide metal perovskite-based devices.

Department/s

  • Chemical Physics
  • NanoLund: Center for Nanoscience

Publishing year

2018-10-25

Language

English

Pages

35656-35663

Publication/Series

ACS Applied Materials and Interfaces

Volume

10

Issue

41

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Materials Chemistry
  • Condensed Matter Physics

Keywords

  • CuInSe QDs
  • PEDOT:PSS
  • perovskite
  • photodetector
  • quantum dots

Status

Published

ISBN/ISSN/Other

  • ISSN: 1944-8244