Long range charge transport in Molecular Electronic devices

分子电子器件中的长程电荷传输

• 批准号: RGPIN-2015-05991
• 负责人: McCreery, Richard
• 金额: $ 4.3万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632318
• 关键词: Long; range; charge; transport; Molecular

The field of molecular electronics (ME) seeks to enhance electronic functions of conventional microelectronic devices by incorporating molecules into electronic circuits to improve performance, lower costs, reduce power demands and provide novel electronic functions. Our group was the first to develop a reliable, reproducible molecular junction with sufficient lifetime (~ years) and temperature tolerance (-260 to +300 °C) for practical applications. This junction enabled an audio processing function not possible with silicon, and a prototype developed in 2014 is currently being evaluated for commercialization in an audio accessory market exceeding $2B/year worldwide. Of particular importance in such devices are the electron transport mechanisms over distances in the 1–25 nm range, which differ fundamentally from the transport in either conventional semiconductors or in the thicker films (>50 nm) in widely studied “organic” electronics. We plan to explore novel transport mechanisms that exploit molecular orbitals for charge transport, with the ultimate objective of rationally designing novel electronic behaviours using variations in molecular structure. We have reported initial results on an ionization mechanism strongly dependent on molecular structure and operative over 5–20 nm, distances too great for quantum mechanical tunneling. A transport distance range of 1–25 nm not only avoids the pitfalls of “organic electronics” but also enables “ballistic” transport, which can enable very high frequency operation (>1000 GHz). We will use the robust molecular junction structure developed over the past decade to pursue three related fundamental subprojects on how molecular structure affects electronic behaviour:

分子电子学 (ME) 领域寻求通过将分子合并到电子电路中来增强传统微电子器件的电子功能，以提高性能、降低成本、减少功率需求并提供新颖的电子功能。我们的团队是第一个开发出可靠、可重复的分子结，具有足够的使用寿命（约年）和耐温性（-260 至 +300 °C）的实际应用。该结点实现了硅无法实现的音频处理功能，2014 年开发的原型目前正在全球每年超过 20 亿美元的音频配件市场进行商业化评估。在此类器件中特别重要的是 1-25 nm 范围内的电子传输机制，这与传统半导体或广泛研究的“有机”电子器件中的较厚薄膜（> 50 nm）中的传输有着根本的不同。我们计划探索利用分子轨道进行电荷传输的新颖传输机制，最终目标是利用分子结构的变化合理设计新颖的电子行为。我们报告了电离机制的初步结果，该机制强烈依赖于分子结构，并且可在 5-20 nm 范围内工作，对于量子力学隧道效应来说，这个距离太大了。 1-25 nm 的传输距离范围不仅避免了“有机电子”的陷阱，而且还实现了“弹道”传输，从而可以实现非常高的频率操作（> 1000 GHz）。我们将利用过去十年开发的强大的分子连接结构来开展三个相关的基础子项目，研究分子结构如何影响电子行为：