Bionic adaptive sensor based on organic transistor and preparation method and application thereof

An adaptive and device technology, applied in semiconductor/solid-state device manufacturing, electric solid-state devices, semiconductor devices, etc., can solve problems such as no reports, achieve excellent signal amplification, achieve rapid attenuation, and be easy to prepare

Active Publication Date: 2019-01-04
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the use of OFETs to simulate the advanced functions of sensory systems and nerve centers has become the frontier of OFET functional research, and a series of flexible and stretchable bionic intelligent structures have emerged (Tee, Benjamin C.K., Chortos, A., and Bao Z., Science, 2015, 350, 313; Kim, Y., Chortos, A., Xu, W., and Bao Z., Science, 2018, 360, 998.), but using OFET to simulate sensory adaptation Behavior not yet reported

Method used

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  • Bionic adaptive sensor based on organic transistor and preparation method and application thereof
  • Bionic adaptive sensor based on organic transistor and preparation method and application thereof
  • Bionic adaptive sensor based on organic transistor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 1) After the glass substrate is ultrasonically rinsed with secondary water, ethanol and acetone, and blown dry with nitrogen, the vacuum degree is 7×10 -4 Under the condition of Pa Aluminum is vapor-deposited on the substrate at a speed of 30nm to obtain the gate electrode;

[0066] 2) Spin-coat polyvinyl alcohol cinnamate (PVC) on the patterned gate electrode obtained in step 1), wherein the concentration of PVC is 30 mg / mL, the solvent is chlorobenzene, and the rotation speed is 3500 rpm. Spin coating to obtain a PVC lower insulating layer with a thickness of 100nm;

[0067] 3) UV curing treatment is carried out on the PVC lower insulating layer obtained in step 2). The UV curing wavelength is 265nm, and the curing time is 20 minutes, and heat treatment is carried out on a hot stage for 1 hour, and then octadecyltrichlorosilane (OTS) gas phase is carried out. Modification, the modification is carried out in a vacuum oven at a temperature of 120°C for 3 hours;

[0...

Embodiment 2

[0074] Utilize the slow adaptation OFET gained in embodiment 1 to carry out electrical performance test, test result is as follows:

[0075] 1) Bias response test:

[0076] The output signal of the source-drain current under continuous gate voltage is as follows Figure 4 It can be seen that the source-drain current attenuates rapidly when the gate voltage remains constant, and the attenuation parameter is around 300 milliseconds, which is equivalent to the attenuation speed of the slow-adaptive receptors on human skin. It shows that the slow-adaptive OFET obtained above can effectively simulate the tactile slow adaptation.

[0077] 2) Speed ​​response test:

[0078] For the human body, for the same intensity of stimulation, the faster the stimulation is applied, the stronger the human body's feeling will be. The speed response test is carried out on the obtained adaptive OFET, and the test results are as follows: Figure 5 As shown, it can be seen that when the gate volta...

Embodiment 3

[0084] According to the method of Example 1, only the parylene in the upper insulating layer obtained by chemical vapor deposition in step 5) is replaced by the PVA obtained by spin coating, that is, the fast adaptable OFET provided by the present invention is obtained;

[0085] Step 5) specifically includes:

[0086] 5) the semiconductor intermediate layer that step 4) obtains is carried out oxygen Plasma surface hydrophilization treatment, and the time is 20 seconds, and power is 24W, and spin-coats polyvinyl alcohol (PVA) on the semiconductor intermediate layer, and the concentration of PVA is 15mg / mL, the solvent is a mixed solvent of 50% ethanol and 50% deionized water, the rotating speed is 3000rpm, and the thickness of the PVA layer obtained is 50nm. Afterwards, heat treatment at 100°C for 1 hour on a hot stage, and then spin-coat a layer of PVC on the obtained PVA layer to smooth the surface. The concentration of PVC is 20mg / mL, the solvent is chlorobenzene, and the r...

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Abstract

The invention discloses a bionic adaptive sensor based on an organic transistor and a preparation method and application thereof. The adaptive OFET comprises a gate electrode, a lower insulating layer, a semiconductor intermediate layer, an upper insulating layer, a semiconductor transport layer and a source electrode and a drain electrode simultaneously positioned on the semiconductor transport layer in sequence from bottom to top. The adaptive OFET structure has universality. The materials of the semiconductor transport layer, semiconductor intermediate layer and insulating layer can be selected flexibly, and the thickness and interface characteristic of each layer can be adjusted flexibly, so that the adaptive decay time parameter can be between 10<-2>s and 10<2>s, the adaptive decay can be adjusted flexibly in the range of 0% to 100%, which is matched with the adaptive behaviors of touch, vision, smell, cold and hot sensation and the like of a human body.

Description

technical field [0001] The invention relates to the fields of organic bioelectronics and flexible multifunctional sensing, in particular to a bionic adaptive sensor based on organic transistors and its preparation method and application. Background technique [0002] Sensory adaptation refers to a physiological phenomenon in which the frequency of action potentials on sensory nerve fibers gradually decreases under the stimulation of a long-term external signal. Through the process of sensory adaptation, organisms can not only effectively perceive the strength of external signals, but also actively adapt to changes in the external environment. Adaptation phenomena widely exist in the human body's visual, auditory, tactile, olfactory and taste sensory systems, such as people's adaptation to light, temperature, noise, smell, etc. Better to pay attention to new stimuli that are more meaningful. As one of the fundamental properties of receptors, the adaptation process plays an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/05H01L51/40
CPCH10K10/466
Inventor 狄重安申弘光金文龙朱道本
Owner INST OF CHEM CHINESE ACAD OF SCI
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