Publication: Effects of spent coffee grounds in pectin polysaccharide thin film on resistive switching characteristics
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Date
2024-08-01
Authors
Leong Hao Zhe
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Abstract
Although inorganic-based Resistive Random Access Memory (ReRAM) has shown promising performance to fulfil the current requirement of high-speed dense memories, it can lead to generation of e-waste which harms the environment. Hence, bio-organic-based ReRAM is developed as a sustainable alternative. The purpose of this research is to improve the resistive switching (RS) performance of pectin ReRAM device through comparing the effect of different spent coffee grounds (SCGs) concentration incorporated into the thin film and the effect of different thin film drying temperature, on the RS performance of the device. Therefore, different concentration of SCGs (0 wt%, 1 wt%, 3 wt%, 5 wt%, and 7 wt%) was incorporated into 5.5 mg/ml pectin precursor solution by microwave-assisted solvent exchange technique. Then, the prepared precursor solutions were spin-coated onto ITO-coated PET substrates and dried at different temperatures (120 oC, 140 oC, 160 oC and 180 oC) for 2 hours before sputtered with gold top electrode. Several characterization techniques were used such as PSA, FTIR, EDX, TGA, goniometer, zeta potential analysis, AFM and SPA to evaluate the effect of SCGs in pectin thin film on RS behaviour. The results showed that pectin ReRAM device with 5 wt% SCGs incorporated and dried at 140 oC has the best RS performance, providing an ON/OFF ratio of 3.53 x 104, which is 101.71% higher compared with pristine pectin ReRAM device. In conclusion, this study demonstrates the potential of SCGs as a promising additive to enhance the RS performance of bio-organic-based ReRAM.