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Ion-assisted Resonant Injection and Charge Storage in Carbon-based Molecular Junctions
Journal of the American Chemical Society ( IF 15.0 ) Pub Date : 2020-06-21 , DOI: 10.1021/jacs.0c03943
Mustafa Supur 1 , Shailendra K Saxena 1 , Richard L McCreery 1
Affiliation  

Resonant injection and resulting charge storage were examined in a large-area carbon/tetraphenylporphyrin(TPP)/LiF/carbon junction, where the LiF layer provides mobile ions in acetonitrile (ACN) vapor. Resonant electron transfer into TPP molecules occurs at <+1V in the presence of mobile ions, enabled by ionic screening of the carbon electrode. Injection of holes, i.e. formation of TPP radi-cal cation, inside the junction was monitored by in-situ photocurrent measurements. Following the injection, despite the lack of a redox counter-reaction or conventional electrolyte, persistent faradaic current peaks dominate the IV cycle of the junction (±2V) in ACN vapor, enhancing the reversible charge storage by a factor of 78 compared to that in vacuum.

中文翻译:

碳基分子结中的离子辅助共振注入和电荷存储

在大面积的碳/四苯基卟啉 (TPP)/LiF/碳结中检查共振注入和由此产生的电荷存储,其中 LiF 层提供乙腈 (ACN) 蒸汽中的移动离子。在移动离子存在的情况下,共振电子转移到 TPP 分子时发生在 <+1V,这通过碳电极的离子屏蔽实现。通过原位光电流测量监测结内的空穴注入,即TPP自由基阳离子的形成。注入后,尽管缺乏氧化还原反反应或常规电解质,但持续的法拉第电流峰值主导着 ACN 蒸气中结 (±2V) 的 IV 循环,与在 ACN 中的可逆电荷存储相比,可逆电荷存储提高了 78 倍。真空。
更新日期:2020-06-21
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