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Method for preparing composite field effect transistor

A field effect transistor and compound technology, applied in the field of microelectronic devices, can solve the problems of insignificant effect, affect the electrical performance of the device, reduce the mobility, etc., and achieve the effect of saving the amount of organic matter, improving the performance of the device, and reducing the cost.

Active Publication Date: 2018-10-16
BEIJING SCITECH NANOTECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Organic field-effect transistors based on conjugated polymer molecules have attracted attention due to their wide application in low-cost, flexible, large-area electrical devices such as integrated circuits, pressure sensors, and organic memory elements. Large, highly free conformation and irregular interchain winding phenomenon will reduce its mobility, and then affect the electrical properties of the device
Although it has been reported that the performance of polymer field effect transistors can be improved by optimizing its molecular structure, the effect is not significant

Method used

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  • Method for preparing composite field effect transistor
  • Method for preparing composite field effect transistor
  • Method for preparing composite field effect transistor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Dissolve the polymer molecule (PCDTPT) in o-dichlorobenzene to obtain a uniformly dispersed solution, dilute so that the concentration of the polymer solution is at 0.01mg / mL ( figure 2 a), graphene powder (100mg) is soaked in polymer dilute solution and has reached full adsorption ( figure 2 b), and then use cellulose acetate membrane (pore size 0.2μm) to carry out suction filtration, repeatedly rinse with o-dichlorobenzene and suction filtration to remove excess polymer molecules on the surface of graphene, so as to ensure that only a few layers of polymer molecules are adsorbed on graphite Alkene surfaces (infrared to characterize the presence of polymer molecules). The obtained composite powder was placed in an oven at 80°C and fully dried to remove the residual o-dichlorobenzene solvent. After drying, it could be uniformly dispersed in DMF to prepare a uniform dispersion of polymer-graphene composite structure (0.08mg / mL) ( image 3 ) for subsequent fabrica...

Embodiment 2

[0048] (1) Dissolve the polymer molecule (CDTBTZ) in o-dichlorobenzene to obtain a uniformly dispersed solution, dilute to make the concentration of the polymer solution 0.05mg / mL, soak the graphene powder (500mg) in the dilute polymer solution To achieve full adsorption, use cellulose acetate membrane (pore size 0.2 μm) to carry out suction filtration, repeatedly rinse with o-dichlorobenzene and suction filtration to remove excess polymer molecules on the surface of graphene, so as to ensure that only a few layers of polymer molecules are adsorbed on the graphene surface. Graphene surface (infrared to characterize the presence of polymer molecules) ( Figure 5 ). The optical photo of the polymer-graphene composite on the filter membrane after suction filtration is as follows: Figure 6 shown. The obtained composite powder was placed in an oven at 80°C and fully dried to remove the residual o-dichlorobenzene solvent. After drying, it could be uniformly dispersed in DMF to pr...

Embodiment 3

[0052] (1) Dissolve the polymer molecule (P3HT) in chlorobenzene to obtain a uniformly dispersed solution, dilute to make the concentration of the polymer solution at 0.03mg / mL, soak the graphene powder (300mg) in the dilute polymer solution to achieve sufficient Adsorption, and then use aluminum oxide filter membrane (pore size 0.02μm) for suction filtration, repeated washing with o-dichlorobenzene and suction filtration to remove excess polymer molecules on the surface of graphene, to ensure that only a few layers of polymer molecules are adsorbed on graphene surface (infrared to characterize the presence of polymer molecules) ( Figure 8 ). The composite powder obtained is placed in an oven at 120°C and fully dried to remove residual chlorobenzene solvent. After drying, it can be uniformly dispersed in tetrahydrofuran to prepare a uniform dispersion of polymer-graphene composite structure (0.01mg / mL), so that Subsequent fabrication of molecular devices. Performance test c...

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Abstract

The invention belongs to the field of microelectronic devices, and in particular, relates to a method for preparing a composite field effect transistor. The method comprises the following steps: 1), dissolving polymer molecules in an organic solvent to obtain polymer solution, and soaking graphene in the polymer solution to obtain mixed dispersion liquid; 2), carrying out the extraction filtrationand cleaning of the mixed dispersion to obtain a graphene compound absorbing polymers on the surface; 3), redispersing the graphene compound in the organic solvent to prepare compound dispersion liquid; 4), adding the compound dispersion liquid to a silicon wafer having a microcolumn structure in a dripping manner, and covering the silicon wafer with a flat substrate, enabling the polymer-graphene compound to self-assemble into a regular one-dimensional array at the position of a microcolumn on the surface of a panel, and forming the composite field effect transistor. Compared with a simple polymer field effect transistor, the prepared field effect transistor of a polymer-graphene composite structure is significantly improved in performance, the method is simple and convenient, and the cost is low.

Description

technical field [0001] The invention belongs to the field of microelectronic devices, and in particular, provides a simple and efficient method for preparing high-performance compound field-effect transistors through non-covalent adsorption between graphene and polymers. Background technique [0002] Organic field-effect transistors based on conjugated polymer molecules have attracted attention due to their wide application in low-cost, flexible, large-area electrical devices such as integrated circuits, pressure sensors, and organic memory elements. Large, highly liberalized conformation and irregular interchain winding phenomena will reduce their mobility, thereby affecting the electrical properties of the device. Although it has been reported that the performance of polymer field effect transistors can be improved by optimizing its molecular structure, the effect is not significant. In order to further improve the performance of the conjugated polymer field effect transi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/40H01L51/05H01L51/30
CPCH10K85/113H10K71/00H10K2102/00H10K10/40H10K10/46
Inventor 吴雨辰刘芸江雷
Owner BEIJING SCITECH NANOTECH CO LTD
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