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A method for improving the stability of organic thin film transistors

An organic thin film and transistor technology, applied in the field of improving the stability of organic thin film transistors, can solve the problems of limited improvement, poor repeatability, complicated preparation process, etc., and achieve the effects of improved stability, easy production and simple method

Inactive Publication Date: 2017-03-08
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have the disadvantages of complex preparation process, limited improvement and poor repeatability.

Method used

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  • A method for improving the stability of organic thin film transistors
  • A method for improving the stability of organic thin film transistors
  • A method for improving the stability of organic thin film transistors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 2 In the structure shown, Si (205) is used as the gate electrode and a layer of 300nm SiO is formed on it by thermal oxidation. 2 (204) as a gate insulating layer. Put the Si chip into the piranha solution prepared by 3:1 concentrated sulfuric acid and hydrogen peroxide, and treat it under heating conditions for 20 minutes, then take it out and wash it with a large amount of deionized water, blow off the water droplets with nitrogen and put it in an oven for drying. Through the mask plate, a layer of 100nm thick Au (202) was evaporated by vacuum evaporation method as the source and drain electrodes. In order to improve the Au and SiO 2 A 5nm Ti film (203) is introduced between the two by thermal evaporation.

[0024] Dissolve P3HT and TPD in chloroform solvent to make 10mg / mL solutions respectively, and mix TPD solution into P3HT solution with a micropipette at a doping concentration of 0.1 wt%. The prepared solution is dropped on the surface of the ...

Embodiment 2

[0028] The same device structure as in Example 1 was adopted, but 0.1 wt% PCBM was doped into the P3HT organic thin film transistor instead of 0.1% TPD during the preparation of the device.

[0029] Figure 5 The on-off ratio of the undoped device and the 0.1%PCBM-doped P3HT organic thin film transistor provided in Example 2 of the present invention vary with time in air. It can be seen from the figure that a small amount of PCBM doped with P3HT can not only greatly increase the switching ratio of the device, but also significantly improve the stability of the device. For example, after 24 hours of storage in air, the on-off ratio of the undoped device dropped sharply from 1450 to 920, while the on-off ratio of the doped 0.1% PCBM device dropped from 14900 to 14745.

[0030] Figure 6 The mobility curves of the undoped device and 0.1%PCBM-doped P3HT organic thin film transistor in air as a function of time provided in Example 2 of the present invention. It can be seen from ...

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Abstract

The invention discloses a method for improving the stability of an organic thin film transistor. The organic thin film transistor includes a gate electrode, a source electrode, a drain electrode, an active layer and an insulating layer. complex organic semiconductor materials. The invention adopts a simple micro-doping method, and uses the organic semiconductor material doped with organic small molecules as the active layer of the organic thin film transistor; effectively improves the stability of the organic thin film transistor, and improves the service life of the device; the method is simple, the cost is low, It is conducive to popularization and application, and has significant economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of organic optoelectronics, and in particular relates to a method for improving the stability of an organic thin film transistor. Background technique [0002] In recent years, the rapid development of organic optoelectronic technology has attracted the attention of the whole world, and this field has become the research and development object of academic research institutions and industries in various countries. At present, organic thin-film transistors (organic thin-film transistors, OTFTs), organic solar cells (organic solar cells, OSCs), organic light-emitting diodes (organic light-emitting diodes, OLEDs), optical waveguides (waveguide) and other electronic devices have been successfully developed . In particular, the commercialization of OTFTs-driven liquid crystal displays, OLEDs display devices, and the successful development of E-ink e-books have further demonstrated the attractive application prosp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/05H01L51/30
CPCH10K85/211H10K85/615H10K85/626
Inventor 马良
Owner MINJIANG UNIV