Dielectric medium trap state measuring and imaging system and method driven by friction nanometer generator

Abstract

The invention relates to a dielectric medium trap state measuring and imaging system and method driven by a friction nanometer generator, and belongs to the technical field of dielectric media. The system comprises a trap excitation power supply device and a test sample chamber, the trap excitation power supply device comprises an independent layer rotary friction nano generator and a rotary motor, and can output constant charge and high voltage, excite micro-power dielectric barrier uniform discharge on the surface of a dielectric medium, so that electrons are fully sunken and desunken, and desunken current pulses with enough strength and stability are generated; a test sample chamber is used for fixing the dielectric film to be tested and providing controllable filling gas; a test electrode structure is detachable, and electrode groups with different measurement modes can be replaced; and the air gap distance between the upper and lower electrodes can be adjusted. The system has the advantages of being lossless, accurate and capable of achieving two-dimensional imaging, detailed information of trap state distribution on the surface of the high polymer thin film material is further obtained, and detection and improvement of various properties such as insulation, energy storage and micro-nano surface characteristics of the functional material are facilitated.

Description

technical field [0001] The invention belongs to the field of dielectric technology, and relates to a dielectric trap state measurement and imaging system and method driven by a triboelectric nanogenerator. Background technique [0002] Trap state is a crucial and widely influential mesoscopic concept. Trap state density and trap energy level distribution are important basic parameters for energy generation, storage, transportation and conversion devices and materials at various energy scales. A large number of studies have shown that surface trap states have a wide and significant impact on the performance of devices made of polymer materials, such as polymer dielectrics for electrical insulation in electrical energy storage and high-voltage applications, and solar thin films that can generate clean energy Batteries, various nanogenerators, etc. During the manufacturing process of the above-mentioned devices, due to the intrinsic defects of the component materials and the ...

AI Technical Summary

Problems solved by technology

However, because it is difficult to stably control the number of trapped charges and de-trapped charges that have no intrinsic relationship with the external physical field in a single measurement, the test results obtained by existing methods can only be used for qualitative comparison and phenomenological interpretation. To a certain extent, it limits the further development of related disciplines

More importantly, the distribution imaging of surface trap states still faces great challenges, and the realization of this method has a profound impact on the technical level of precision processing of advanced energy materials

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