Beyond electrostatic modification: design and discovery of functional oxide phases via ionic-electronic doping
Beyond electrostatic modification: design and discovery of functional oxide phases via ionic-electronic doping
复制标题
DOI：
10.1080/23746149.2018.1523686
复制
发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Hai-Tian Zhang;Zhen Zhang;Hua Zhou;Hidekazu Tanaka;D. Fong;S. Ramanathan
中科院分区：
文献类型：
--
作者：
Hai-Tian Zhang;Zhen Zhang;Hua Zhou;Hidekazu Tanaka;D. Fong;S. Ramanathan
摘要将离子输运与载流子调制相结合来实现新的物理性质和亚稳相的发现，是功能材料和器件物理学的一个新的研究领域。实现功能的范例远远超出了带状半导体中载流子的积累或耗尽，或者简单地通过绝缘电解液移动离子。相反，通过仔细选择电子或结构脆弱的材料，人们可以通过极端的离子掺杂浓度来坍塌或打开带隙，或者重新配置它们的整个晶体结构来创造新的相。在这样的系统中，电子-电子和电子-晶格相互作用可以通过电场独立地耦合或控制，而不受离子掺杂的热约束。贯穿这些研究的统一主题是通过界面通过电场引入离子和电子，其中电化学起主导作用。在这篇综述中，我们简要地总结了这一新兴的离子电子学领域，并用二元和复合氧化物以及选定的2D材料系统的例子讨论了迄今为止的主要结果。我们通过强调基础科学理解方面的差距和在未来电子、光子和能源技术中使用这种新器件的前景来结束审查。图形摘要
ABSTRACT A new research field of functional materials and device physics is rising that combines ionic transport with charge carrier modulation to realize emergent physical properties and discovery of metastable phases. The paradigm for enabling function extends far beyond carrier accumulation or depletion in band semiconductors or simply moving ions through an insulating electrolyte. Rather, by carefully selecting electronically or structurally fragile materials, one can collapse or open band gaps via extreme ionic dopant concentration, or reconfigure their entire crystal structure to create new phases. Electron–electron and electron–lattice interactions can be coupled or controlled independently in such systems via electric fields without thermal constraints by use of ionic dopants. The unifying theme across these studies is to introduce ions and electrons via electric fields through interfaces, with electrochemistry playing a dominant role. In this review, we briefly summarize this nascent field of iontronics and discuss principal results to date with examples from binary and complex oxides as well as selected 2D materials systems. We conclude the review by highlighting gaps in fundamental scientific understanding and prospects for the use of such novel devices in future electronic, photonic and energy technologies. Graphical Abstract