Biological phototransistor based on protein molecules and preparation method thereof

A phototransistor, protein molecule technology, applied in the field of photoelectric sensing, can solve problems such as low utilization rate, achieve good biocompatibility, good sensitivity and specificity, and broaden the response band effect.

Pending Publication Date: 2022-05-17
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the forbidden band width of zinc oxide is 3.34eV, and the photoresponse band is limited to 360nm-390nm, which can only absorb ultraviolet light in sunlight, but ultraviolet light only accounts for about 3% of the entire solar spectrum, so zinc oxide devices are not sensitive to sunlight. The utilization rate of light energy is low

Method used

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  • Biological phototransistor based on protein molecules and preparation method thereof
  • Biological phototransistor based on protein molecules and preparation method thereof
  • Biological phototransistor based on protein molecules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] figure 1 It is a structural schematic diagram of the biophototransistor based on protein molecules in Example 1 of the present invention.

[0036] Such as figure 1 As shown, the phototransistor structure in Embodiment 1 mainly includes: a substrate, a dielectric layer, a channel layer, two gold electrodes, and a photosensitive active layer arranged sequentially from bottom to top.

[0037] The substrate in Embodiment 1 is a silicon substrate, and the dielectric layer is silicon dioxide with a thickness of 300 nm.

[0038] The channel layer is nano-scale sheet-shaped zinc oxide grown by CVD, and its size is a two-dimensional sheet-like structure with a length of 8 μm and a width of 7 μm. In some other embodiments, the size of the flaky zinc oxide can be appropriately selected according to the actual situation, and the range is generally a square or rectangular two-dimensional sheet structure with a length of 2-8 μm and a width of about 2-8 μm.

[0039] The pre-designe...

Embodiment 2

[0060] The difference between this example and Example 1 is that in the preparation of the protein-based biophotoelectric transistor, the light-sensitive protein molecules were drip-coated on the surface of the semiconductor transistor, and then air-dried for 2 hours before testing.

Embodiment 3

[0062] The difference between this example and Example 1 is that in the preparation of the protein-based biophotoelectric transistor, the channel layer of the semiconductor transistor, that is, the sheet-shaped zinc oxide has a size of 2 μm in length and 7 μm in width.

[0063] In summary, the biological phototransistor device made according to the preparation method of the present invention can further explore and study the light response characteristics of the light-sensitive protein molecule bacteriorhodopsin, which belongs to the application field research of biological photosensitive materials; in addition , In the past, the research on photocells based on protein molecules needed to provide an electrolyte conductive loop environment for the device, and the electrolyte solution would bring a greater influence on the dark current of the device loop. The biophototransistor based on protein molecules can provide a conductive channel for the device through the semiconductor ma...

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Abstract

The invention provides a biological phototransistor based on protein molecules and a preparation method thereof, and belongs to the field of photoelectric sensing. The biological phototransistor comprises a substrate, a dielectric layer, a channel layer and a photosensitive active layer. The method comprises the following steps: growing a silicon dioxide dielectric layer on a silicon substrate, transferring a semiconductor material to the dielectric layer to prepare a channel layer, exposing a pre-designed electrode pattern on the semiconductor material by using an electron beam exposure method, and evaporating an electrode to prepare a semiconductor transistor. And grafting photosensitive protein molecules serving as a photosensitive active layer onto the semiconductor transistor to prepare the biological photoelectric transistor.

Description

technical field [0001] The invention belongs to the technical field of photoelectric sensing, and in particular relates to a biophotoelectric transistor based on protein molecules and a preparation method thereof. Background technique [0002] The statements in this section only provide background information related to the present disclosure and may not constitute prior art. [0003] As a representative of the third-generation semiconductor materials, zinc oxide has the advantages of wide band gap, high thermal conductivity, high stability, and low cost. The nano-ZnO structure has a large specific surface area and high carrier mobility, which makes it a hot spot in the research of optoelectronic materials in recent years. However, the forbidden band width of zinc oxide is 3.34eV, and the photoresponse band is limited to 360nm-390nm, which can only absorb ultraviolet light in sunlight, but ultraviolet light only accounts for about 3% of the entire solar spectrum, so zinc ox...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/46H01L51/42
CPCH10K71/12H10K85/761H10K30/65H10K2102/00Y02E10/549
Inventor 刘文清张涛王海露刘方武丁昆
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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