Preparing a flexible porous polymer TFTs

Proton field effect transistor (the FET) is a very promising and may be coupled to conventional electronic techniques and biological systems. All FET has a gate (Gate), a drain (Drain), a source (source) terminal of three, each group corresponding to substantially the bipolar transistor (Base), a collector (Collector) and an emitter (Emitter ), use of different gate bias can fine tune the carrier density in the proton conductive material charge. And wherein the electrically conductive material may be made of conventional ceramic oxide, a solid acid, polymers and biological material, plays a key role in the biochemical events and conducting electronic signals. Wherein the porous organic polymer having a large specific surface area, high porosity, good structure stability as well as the advantages of high modularity, is a very promising microscopic proton carrier. Designed with hydrophilic sites rich organic polymer to form a hydrogen bond network may accelerate the flow of protons, while the film-forming polymers are also easily processed and have good mechanical strength. However, to date there are few reports FET prepared utilizing these organic porous polymer film material. 柔性多孔聚合物薄膜场效应晶体管的制备 Recently, Fujian Institute of structure of matter Academy of Sciences Xu Gang and Wang Ruihu researcher in \” Adv .Mater. \”published a paper entitled\” Flexible Porous Organic Polymer Membranes for Protonic Field-Effect Transistors \”paper, the paper reported , a novel based on sulfur ureido polymer film proton field effect transistor . The novel polymeric films have good flexibility and robustness, and the process makes it possible to characterize porous organic polymer film based, hydration and furthermore at room temperature, the mobility of protons in this polymer film up to 5.7 × 10 3 cm 2 V 1 s 1 . By changing the voltage applied to the gate, which can flow up to the proton current is 3.3 times (4.3 × 10 17 ~ 14.1 × 10 17 cm – [123 ] 3 ) monitoring and control.

柔性多孔聚合物薄膜场效应晶体管的制备 Preparation 1. FIG thiourea group of the polymer film and characterization of
In the synthesis easier thiourea as a base, at room temperature by a condensation reaction can be easily thiourea porous organic polymer film is prepared. 1, using (4-aminophenyl) terephthalamide benzene and 1,3,5-isothiocyanate in DMF was added phytic acid can be obtained brown translucent emulsion, this emulsion coating after the glass substrate, another glass plate using a flattened, to obtain a transparent porous polymer film, and the thickness of the film can be adjusted by varying the number of the starting material. The results show that the BET specific surface area of ​​this polymer film colloid, pore volume, and N

2 were adsorbed amount up to 51 m 2 g 1 , 0.176cm 3 g 1 , and 121 cm 3 g 1 , this multi-level structure helps increase the carrier concentration and mobility, in order to achieve high proton conductivity. Known, microstructure and morphology of the polymer film play an important role in proton-exchange properties and the proton conductivity of the transistor. 2, the surface of the polymer film is very smooth, and no voids exist, SEM results show that the organic polymer films exhibit a layered structure, and the film thickness is about 0.95 ~ 0.98μm. EDS results indicated that phytic acid have uniformly doped porous polymer film material, such a material can thus be used as a storage medium over the conduction and proton exchange. AC impedance spectroscopy studies showed that electrochemical proton conductivity of the polymer film at 98% RH and 90%, respectively, up to 1.1 × 10 3 , and 2.8 × 10 3 S cm 1 . The value of the existing proton conductivity of the material reported in the same or even better. This result is due to a higher water absorption capacity may provide more mobility by hydrogen protons.

柔性多孔聚合物薄膜场效应晶体管的制备 Figure 2. SEM thioureido optical polymer film characterized
Thanks to good proton conductivity, such novel porous organic polymer film may be constructed as a FET channel. In the newly assembled FET, Si / SiO

2 substrate is used as the gate of the FET, Pd is used as a source electrode and a drain electrode, and this thiourea-based polymer film is used as the channel material . In practice tests, the proton mobility of the organic polymer film can reach 5.7 × 10 3 cm 2 V [ 123] – 1 s 1 , and the numerical results have been reported similar proton conductor. Further, the organic polymer film of proton transport and also electrostatic voltage. Test results show that the stability of such polymer films also have good short-term stability, since the proton relaxation effect on the proton in the FET, this repeated experiment interval is five minutes, and this phenomenon is similar to the role of short-term memory , this result indicates that the FET-based porous polymer film can be used as a promising synaptic bionic device. Conclusion:

This design and manufacture an organic polymer film material having a high proton mobility. And explore the first polymeric film material such as the proton conductive material is applied in the FET devices. Thanks to the hydrogen bonding network in the porous polymer, such a film material may reach 5.7 × 10

3 cm 2 V 1 s 1 proton mobility. Further, the proton current in the polymer film can be adjusted to 3.3 by the gate voltageTimes. Given the unique advantages of such a film material in a modular and functional aspects of the structure, physical and electrical properties of the polymer backbone and can be adjusted thereto by combining the guest molecule is further improved. This study provides a promising modular proton-conducting material is a biological electronic applications. Principle and Characterization thioureido polymeric film field effect transistor

3. FIG. 柔性多孔聚合物薄膜场效应晶体管的制备
Reference: Hong Zhong et al Flexible Porous Organic Polymer Membranes for Protonic Field-EffectTransistors DOI:. 10.1002 / adma.202000730.https: //doi.org/10.1002/adma.202000730.

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