Aloe vera gel as natural organic dielectric in electronic application
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Aloe vera gel as an environmentally safe and natural material as an organic dielectric layer used in electronic application has been systematically investigated in this work. The commercially purchased gel was deposited on glass substrate by screen printing technique. Effect of drying temperature and duration on the quality of the Aloe vera layer had been examined. The lowest leakage current density was obtained in sample dried at 40 °C for 30 min but electrical breakdown voltage of the sample had reduced as the drying duration was extended more than 40 min. In addition, effect of successive applying the Aloe vera layer and distance between two electrodes on the leakage current of the dielectric had been reported. It was found that single layered Aloe vera had the lowest leakage current density but there was no significant effect of the distance between two electrodes on the leakage current of the dielectric. The produced natural Aloe vera gel after being dried was having a dielectric constant of 3.39 and therefore it had been demonstrated that this material is a potential candidate to be used as a dielectric material in an organic-based electronic device.
KeywordsPMMA Dielectric Property Root Mean Square Gate Insulator Leakage Current Density
One of the authors (L.Q.K.) would like to acknowledge the financial support given by the Ministry of Higher Education Malaysia under the MyMaster scholarship program and Shin-Etsu Chemical, Japan, for providing the cyanoethyl pullulan (CP) and cyanoethyl polyvinylalcohol (CPVA) for this research. The authors would also like to thank the Research Grant provided by Universiti Sains Malaysia through RU-PRGS (Grant No. 8035003) and USM Short Term Grant (Grant No. 60311034).
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