Photoelectric detector based on colloidal quantum dots and graphene utilized as photoelectrode and manufacturing method thereof

A technology of colloidal quantum dots and photodetectors, which is applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electric solid-state devices, etc., can solve the problems of difficult adjustment of response spectrum peak position and low electron mobility, and achieve effective separation , enhance the interaction, improve the effect of sensitivity
CN102306707AInactive Publication Date: 2012-01-04BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2012-01-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a photoelectric detector based on colloidal quantum dots and grapheme utilized as a photoelectrode and a manufacturing method thereof and belongs to the fields of photoelectric conversion, new energy materials and technologies. The method comprises the following steps: preparing a graphene film on a clean ITO (indium tin oxide) glass surface by an electrophoresis method, and then preparing a layer of colloidal quantum-dot film on the graphene film; spinning an organic polymer active layer on the photoelectrode; and finally evaporating the photoelectrode to obtain a photoelectric detector. The method for manufacturing the structure of the photoelectric detector provided by the invention is simple and low-priced; spectral bands induced by the detector can be adjusted according to the compositions of the polymers and the spectral band range of the incident sunlight absorbed by the polymers; PbS colloidal quantum dots with different particle sizes can absorb near-infrared light with different wavelengths and different near-infrared spectrums in the incident sunlight can be absorbed by the photoelectric detector with the colloidal quantum dots; and the quantum dots dotted on the graphene film can interact with the graphene, so that photon-generated carriers can be effectively separated and rapidly transmitted, and the photoelectric detection sensitivity is improved.
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Description

technical field

[0001] The invention relates to a photodetector based on colloidal quantum dots and graphene as a photoelectrode and a preparation method thereof, belonging to the fields of photoelectric conversion, new energy materials and technologies. Background technique

[0002] Photodetectors are mainly used for ray measurement and detection, industrial automatic control, photometry, etc. in the visible or near-infrared bands. The detection of mid-infrared (MIR) and far-infrared (FIR) radiation is widely used in remote sensing, thermal Imaging, night vision, space positioning and many other fields have important military and civilian significance.

[0003] In our modern life, light-emitting diodes, transistors, and solar cells based on semiconductor heterojunctions are widely used in satellite TV systems and mobile communication systems. However, with the advent of nanotechnology, semiconductor heterojunctions with nanometer dimensions have shown great application pot...

Claims

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