In praise and in search of highly-polarizable semiconductors: Technological promise and discovery strategies
In praise and in search of highly-polarizable semiconductors: Technological promise and discovery strategies
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DOI：
10.1063/1.5124795
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发表时间：
2019-10-01
期刊：
影响因子：
6.1
通讯作者：
Ravichandran, J.
中科院分区：
文献类型：
--
作者：
Jaramillo, R.;Ravichandran, J.
材料的介电响应是电子学和光子学的基础。在高频下，介电极化率设定光密度和吸收的尺度。在低频，介电极化率决定了结和器件的能带图，非线性效应使可调电容器和电光调制器成为可能。更复杂但同样重要的是介电响应在屏蔽束缚和移动的电荷中的作用。这些效应控制缺陷电荷捕获和复合速率，设置绝缘体-金属转变的尺度，并介导电荷载流子之间以及电荷载流子与声子之间的相互作用。从这个角度来看，我们通过强调高度可极化半导体的潜力来促进其发现，以改善现有的光电器件技术并实现新的光电器件技术。然后，我们建议发现策略的基础上，固态化学原理和最近的努力，在计算材料筛选的建设。(C)2019年作者。
The dielectric response of materials underpins electronics and photonics. At high frequencies, dielectric polarizability sets the scale for optical density and absorption. At low frequencies, dielectric polarizability determines the band diagram of junctions and devices, and nonlinear effects enable tunable capacitors and electro-optic modulators. More complicated but no less important is the role of dielectric response in screening bound and mobile charges. These effects control defect charge capture and recombination rates, set the scale for insulator-metal transitions, and mediate interactions among charge carriers and between charge carriers and phonons. In this perspective, we motivate the discovery of highly polarizable semiconductors by highlighting their potential to improve existing and enable new optoelectronic device technologies. We then suggest discovery strategies based on solid state chemical principles and building on recent efforts in computational materials screening. (C) 2019 Author(s).