Ambipolar solution-processed hybrid perovskite phototransistors

Abstract

Organolead halide perovskites have attracted substantial attention because of their excellent physical properties, which enable them to serve as the active material in emerging hybrid solid-state solar cells. Here we investigate the phototransistors based on hybrid perovskite films and provide direct evidence for their superior carrier transport property with ambipolar characteristics. The field-effect mobilities for triiodide perovskites at room temperature are measured as 0.18 (0.17) cm 2 V −1 s −1 for holes (electrons), which increase to 1.24 (1.01) cm 2 V −1 s −1 for mixed-halide perovskites. The photoresponsivity of our hybrid perovskite devices reaches 320 A W −1 , which is among the largest values reported for phototransistors. Importantly, the phototransistors exhibit an ultrafast photoresponse speed of less than 10 μs. The solution-based process and excellent device performance strongly underscore hybrid perovskites as promising material candidates for photoelectronic applications.

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Cited by papers we hold 5

• State of the Art and Prospects for Halide Perovskite Nanocrystals · 2021
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• Carrier lifetime enhancement in halide perovskite via remote epitaxy · 2019
  Not checked
• Single crystal hybrid perovskite field-effect transistors · 2018
  Not checked
• Plausible carrier transport model in organic-inorganic hybrid perovskite resistive memory devices · 2018
  Not checked
• Accelerated discovery of stable lead-free hybrid organic-inorganic perovskites via machine learning · 2018
  No notice

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