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A kind of organic/inorganic hybrid perovskite photodetector and preparation method thereof

A photodetector and perovskite technology, applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electric solid-state devices, etc., can solve the problem of low external quantum efficiency and achieve high external quantum efficiency and wide spectral response

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer photodetector based on PDPP3T:PC71BM can achieve a wider spectral detection (near-infrared response can reach 1000nm), but its external quantum efficiency in the visible region is lower than that of perovskite detectors.

Method used

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  • A kind of organic/inorganic hybrid perovskite photodetector and preparation method thereof
  • A kind of organic/inorganic hybrid perovskite photodetector and preparation method thereof
  • A kind of organic/inorganic hybrid perovskite photodetector and preparation method thereof

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Embodiment

[0050] (1) Put the ITO substrate in the lotion, acetone, isopropanol, and deionized water for ultrasonic cleaning, then blow dry with ordinary nitrogen, dry the sheet in an oven at 120°C for 20 minutes, and finally use ultraviolet ozone treatment ITO surface.

[0051] (2) The treated ITO was placed in a spin coater, PEDOT:PSS was added dropwise, spin-coated at 3000rpm / min for 60s, annealed at 120°C for 20 minutes, and dried on a hot table at 120°C.

[0052] (3) Transfer the substrate spin-coated with PEDOT:PSS to a glove box, weigh 666mg of lead iodide and dissolve it in 1ml of N,N-dimethylformamide, dissolve it at 65°C for 3 hours, and dissolve the dissolved iodide The lead solution was spin-coated on the substrate at 3000 rpm / min, and the substrate was annealed at 70° C. for 10 minutes to remove the solvent. Spin-coat the IPA solution of methyl iodide on the lead iodide film, and anneal at 100°C for 55min.

[0053] (4) Weigh 5mg of PDPP3T and 10mg of PC71BM in 1ml of chlor...

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Abstract

The invention belongs to the field of photoelectric materials, and discloses an organic / inorganic hybrid perovskite photodetector and a preparation method thereof. The photodetector is composed of a substrate, an anode, a hole transport layer, a perovskite layer, a near-infrared absorbing layer and a cathode layered in sequence. The perovskite layer is made of perovskite with visible light response. The preparation material of the near-infrared absorbing layer is an organic polymer material with near-infrared response. The invention adopts a lamination method and utilizes an organic near-infrared polymer detection material to improve the quantum efficiency of a lead perovskite photoelectric detection device within and outside the near-infrared range. This leads to the realization of organic / inorganic hybrid perovskite photodetectors with high external quantum efficiency and broad spectral response.

Description

technical field [0001] The invention belongs to the field of photoelectric materials, in particular to an organic / inorganic hybrid perovskite photodetector and a preparation method thereof. Background technique [0002] Among various optoelectronic materials, perovskite materials have attracted great attention from researchers due to their advantages such as high light absorption coefficient, low exciton binding energy, and long carrier diffusion distance. In just eight years, calcium The photoelectric conversion efficiency of titanium oxide solar cells has been increased from 3.8% to 22.1%. Recently, researchers have begun to apply perovskite in photodetectors. Yang Yang et al. first used perovskite as a photosensitive layer to prepare a detection rate of 10 14 Jones' detectors (Dou,L.; Yang,Y.M.; Dou,J.; Hong,Z.; Chang,W.-H.; Li,G.; Yang,Y.,Nat.Commun.2014,5, 5404-5409). Afterwards, Paul et al. realized a perovskite photodetector with low dark current and high detection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/10H10K85/60H10K30/10Y02E10/549
Inventor 马东阁杨德志王玉坤
Owner SOUTH CHINA UNIV OF TECH