Impact of electron irradiation on microstructural, dielectric and electrical properties of potassium ion conducting PVA solid polymer composite

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical and Quantum Electronics Pub Date : 2025-01-22 DOI:10.1007/s11082-025-08042-1

B. K. Mahantesha, V. Ravindrachary, L. Rashmi, R. Padmakumari, Shreedatta Hegde, V. C. Petwal

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Abstract

The study investigates the solid polymer composite (SPC) made using solution casting with PVA as the host polymer and KI as the dopant. The SPC was exposed to electron beam doses ranging from 0 to 300 kGy to study its microstructural, optical, thermal, electrical, and dielectric properties. XRD, FTIR, and TGA were used to study the structural and thermal properties. Results showed variations in crystalline phase, charge transfer complex formation, and defects due to crosslinking and chain scission processes. The activation energy for thermal decomposition values matches the onset temperature. UV–Vis studies revealed changes in optical properties with radiation dose, attributed to molecular ordering changes, defects formation, and charge transfer complexes. Electric and dielectric properties were studied using impedance spectroscopy. The highest ac conductivity was achieved for 300 kGy-irradiated SPC, attributed to free radical production. The correlated barrier hopping model was found to be the best fit for characterizing the electrical conduction mechanism of the system. Dielectric measurements revealed non-Debye behavior and substantial dielectric dispersion in the frequency range, increasing with irradiation dose. The results suggest the SPC is a potential candidate for solid-state energy storage and conversion applications.

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电子辐照对钾离子导电PVA固体聚合物复合材料微观结构、介电性能和电学性能的影响

研究了以PVA为主体聚合物，KI为掺杂剂，采用溶液铸造法制备的固体聚合物复合材料（SPC）。将SPC暴露于0 ~ 300 kGy的电子束剂量下，研究其显微结构、光学、热学、电学和介电性能。采用XRD、FTIR、TGA等方法研究了其结构和热性能。结果表明，由于交联和链断裂过程，晶体相、电荷转移络合物的形成和缺陷发生了变化。热分解值的活化能与起始温度相匹配。紫外-可见研究揭示了分子的有序变化、缺陷形成和电荷转移配合物导致的光学性质随辐射剂量的变化。用阻抗谱法研究了材料的电性能和介电性能。由于自由基的产生，300 kgy辐照的SPC达到了最高的交流电导率。发现相关势垒跳变模型最适合描述系统的导电机理。介电测量显示非德拜行为和大量的介电色散在频率范围内，随辐照剂量增加。结果表明，SPC是固态能量存储和转换应用的潜在候选者。

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来源期刊

Optical and Quantum Electronics 工程技术-工程：电子与电气

CiteScore

4.60

自引率

20.00%

发文量

810

审稿时长

3.8 months

期刊介绍： Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest. Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.