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Planar conjugated molecule compound and monomolecular field effect transistor comprising same

A technology of field-effect transistors and molecular compounds, applied in the field of single-molecule field-effect transistors, can solve problems such as poor stability and integration, sensitivity to dielectric layer thickness, and difficult process implementation, and achieve good conjugation, face-to-face stacking, The effect of strong grid electric field control ability

Pending Publication Date: 2022-03-22
北京未名元上分子技术有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the most mature system in the control strategy of single-molecule field-effect transistor devices is based on the electrostatic field generated by traditional solid-state gates, but the control efficiency of this control method is low, and the stability and integration of single-molecule field-effect transistor devices are poor. , the device is sensitive to the thickness of the dielectric layer, especially the current dielectric layer is mostly made of silicon dioxide, hafnium dioxide and other materials. It is extremely difficult to prepare a solid dielectric layer with a thickness matching the molecular size. , and the low dielectric constant of silicon dioxide also limits its application in advanced manufacturing processes

Method used

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  • Planar conjugated molecule compound and monomolecular field effect transistor comprising same
  • Planar conjugated molecule compound and monomolecular field effect transistor comprising same
  • Planar conjugated molecule compound and monomolecular field effect transistor comprising same

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preparation example Construction

[0056] The third aspect of the present application provides the preparation method of the unimolecular field effect transistor provided in the second aspect of the present application, which includes the following steps:

[0057] 1) preparing a graphene gate electrode layer on the substrate;

[0058] 2) Preparation of Bi on the upper surface of the graphene gate electrode layer 2 SeO 5 medium bottom layer;

[0059] 3) at Bi 2 SeO 5 Prepare the top layer of h-BN medium on the upper surface of the bottom layer of the medium;

[0060] 4) preparing a graphene electrode layer on the upper surface of the h-BN dielectric top layer;

[0061] 5) the graphene electrode layer is constructed into a nano-gap to obtain a graphene point electrode, and the graphene point electrode includes a graphene source terminal electrode and a graphene drain terminal electrode;

[0062] 6) connecting the graphene point electrode to the molecular heterojunction through an amide bond; the molecular h...

Embodiment 1

[0085] Example 1 Preparation of Single Molecular Field Effect Transistor Based on Compound A1

[0086] (1) Synthesis of compound A1:

[0087]

[0088] Weigh compound 1-1 (12.5g, 0.07mol) and compound 1-2 (27.1g, 0.05mol) in a dry 75mL Schlenk tube, add 30mL diphenyl ether (Ph 2 (0), react at 250° C. for 10 h until the purple color disappears, stop heating after the reaction ends, add water, then extract with dichloromethane, dry the extract with anhydrous sodium sulfate, and finally purify the product by column chromatography, Compound 1-3 was obtained. 1 H NMR (500MHz, Chloroform-d): δ7.72-7.65(m, 2H), 7.59(d, J=7.6Hz, 1H), 7.57-7.51(m, 1H), 7.45(dd, J=8.3, 6.6Hz, 2H), 7.37-7.29(m, 1H). 13 C NMR (125MHz, CDCl 3 ): δ143.49, 141.77, 139.63, 133.86, 131.25, 130.98, 130.73, 127.68, 127.11, 123.92. High-resolution mass spectrometry (electrospray time-of-flight mass spectrometry) in positive ion mode (proton number / charge number) (HRMS (TOF-ESI + )(m / z)):m / z:692.05.

[00...

Embodiment 2

[0101] Example 2 Preparation of Unimolecular Field Effect Transistor Based on Compound A2

[0102] (1) Synthesis of compound A2:

[0103]

[0104] Weigh compound 2-1 (3.4g, 0.005mol) and magnesium (Mg, 0.243g, 0.01mol) in a dry 500mL round bottom flask, add 200mL tetrahydrofuran to dissolve it, then add 1 iodine pellet, Locally heat the reaction system with a drying gun until the iodine particles disappear, the reaction will exotherm by itself, keep a slight boiling state and reflux for 1 hour to generate compound 2-2; drop the mixed solution of 10mL ethylene oxide and 20mL tetrahydrofuran under nitrogen atmosphere Added to the reaction system containing compound 2-2, reflux reaction at room temperature for 2 hours, the system after the reaction was rotary evaporated, and finally separated and purified by column chromatography to obtain compound 2-3. 1 H NMR (500MHz, Chloroform-d): δ8.46(dd, J=11.9, 1.5Hz, 2H), 8.37(t, J=7.5Hz, 1H), 8.23-8.15(m, 5H), 7.95(t ,J=7.5Hz,1H),7...

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Abstract

The invention provides a planar conjugated molecule compound and a monomolecular field effect transistor comprising the same, the planar conjugated molecule compound has good conjugacy and planarity, can realize face-to-face accumulation, and is beneficial to carrier transmission; in the single-molecule field effect transistor, the planar conjugated molecule compound can be stably connected to gaps of two-dimensional single-layer graphene with a nano gap array through an amide covalent bond to form a molecular heterojunction, and a novel two-dimensional material with atomic level flatness and controllable atomic layer thickness is adopted. Van der Waals hetero-structures are formed through Van der Waals stacking and assembling of different two-dimensional materials, accurate control of preparation of the single-molecule field effect transistor and stability of measurement can be achieved, and the single-molecule field effect transistor has high gate electric field regulation and control capacity and good stability and integration.

Description

technical field [0001] The present application relates to the technical field of field effect transistors, in particular to a planar conjugated molecular compound and a single molecule field effect transistor containing it. Background technique [0002] The rapid growth of nanotechnology research has led to the development of computing devices, solar energy harvesting, chemical sensing, photonics and optoelectronics, biomedical electronics (such as cell-chip junctions, electronic cells, electronic therapy and prosthetics), and biofuel cells. Come a great revelation. The development of electronic devices based on controllable molecular conduction meets the urgent need for further device miniaturization on the one hand and the need for organic and inorganic materials for biomedical and nanoelectronic applications on the other hand. Among them, organic molecular field effect transistors have molecular-level dimensions. Applying a gate voltage in a molecular heterojunction can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/50C07C211/31C07D487/22C07D471/06H01L51/05H01L51/40
CPCC07C211/50C07C211/31C07D487/22C07D471/06C07C2603/54H10K71/15H10K71/12H10K85/624H10K85/6572
Inventor 郭雪峰李佩慧张苗贾传成常新月
Owner 北京未名元上分子技术有限公司
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