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Field and electron beam-induced luminescence phenomena in polypropylene thin films

机译:聚丙烯薄膜中的场和电子束诱导的发光现象

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摘要

Field-induced luminescence of insulating polymers is an exciting field of research. Being intrinsically related with the high-field electronic properties of the material, it provides a way to investigate electrical ageing and breakdown processes. It is particularly suited for those materials used in high field applications, e.g. thin films of polypropylene in capacitors. One of the puzzling aspects of electroluminescence in wide band gap polymers is that the emission spectra are only reproduced under electron beam irradiation. In this communication, we report for the first time the field and electron beam induced luminescence in polypropylene films. Measurements were performed on 17 μmthick bi-oriented polypropylene films. The home-designed electron gun provides electrons of up to 10 keV in energies. Emission spectra acquired for different beam energies are compared to the electroluminescence spectra obtained under AC stress for fields in the range 150-300 kV/mm. The nature of the excitation process in field and electron beam-induced luminescence is discussed together with the nature of emitting species and their significance for ageing study.
机译:隔膜诱导的绝缘聚合物发光是令人兴奋的研究领域。本质上与材料的高场电子性质有关,它提供了研究电老化和击穿过程的方法。特别适用于高场应用中使用的材料,例如,电容器中聚丙烯的薄膜。宽带间隙聚合物中的电致发光的令人费解的方面之一是仅在电子束照射下再现发射光谱。在这种通信中,我们首次报告该领域和电子束诱导聚丙烯薄膜的发光。在17μMTHICKBI取向的聚丙烯薄膜上进行测量。家居设计的电子枪在能量中提供高达10 kev的电子。将针对不同光束能量获得的发射光谱与在150-300kV / mm范围内的AC应力下获得的电致发光光谱进行比较。与发光物种的性质及其对老化研究的意义一起讨论了现场和电子束诱导的发光中的激发过程的性质。

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