Multilevel Operation of Resonant Tunneling with Binary Molecules in a Metal鈥揑nsulator鈥揝emiconductor Configuration

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• 作者：Hoon-Seok Seo ; Ryoma Hayakawa ; Toyohiro Chikyow ; Yutaka Wakayama
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：March 27, 2014
• 年：2014
• 卷：118
• 期：12
• 页码：6467-6472
• 全文大小：349K
• 年卷期：v.118,no.12(March 27, 2014)
• ISSN：1932-7455

文摘

We attained multilevel manipulation of resonant tunneling in a metal鈥搃nsulator鈥搒emiconductor (MIS) structure, in which heterogeneous molecules of copper hexadecafluorophthalocyanine (F₁₆CuPc) and copper phthalocyanine (CuPc) were embedded in an insulating layer to form a double-tunneling junction. Resonant tunneling was observed in samples with either molecule, revealing that the molecules worked as intermediate electrodes for the tunneling current. The carrier transport was ascribed to resonant tunneling through the energy levels of individual molecules. That is, the threshold voltage of resonant tunneling can be controlled according to the energy levels of the molecules. We achieved multilevel resonant tunneling operation with binary molecules of F₁₆CuPc and CuPc, in which the carriers were injected into the respective molecules at corresponding threshold voltages. Our findings point to a new multilevel operation of resonant tunneling through organic molecules in a practical MIS device structure.