CuInSe2 Quantum Dots Hybrid Hole Transfer Layer for Halide Perovskite Photodetectors

Ruiqi Guo, Fei Huang, Kaibo Zheng, Tonu Pullerits, Jianjun Tian*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

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 X 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.
Original languageEnglish
JournalACS Applied Materials and Interfaces
Volume10
Issue number41
Pages (from-to)35656-35663
Number of pages8
ISSN1944-8244
DOIs
Publication statusPublished - 2018

Keywords

  • Quantum dots
  • CuInSe2 QDs
  • PEDOT:PSS
  • Perovskite
  • Photodetector

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