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| 1 | Design of an all-day electrical power generator based on thermoradiative devices显示文摘Energy harvesting from sun and outer space using thermoradiative devices(TRDs),despite being promising renewable energy sources,is limited only to daytime and nighttime period,respectively.Such a system with 24-hour continuous electric power generation remains an open question thus far.Here,a TRD-based power generator that harvests solar energy via concentrated solar irradiation during daytime and via thermal infrared emission towards the outer space at nighttime is proposed,thus achieving the much sought-after 24-hour electrical power generation.Correspondingly,a rigorous thermodynamical model is developed to investigate the all-day performance characteristics,parametric optimum design,and the role of various energy loss mechanisms.The calculated results predict that the daytime TRD-based system yields a peak efficiency of 12.6%under 10 suns,thus sig-nificantly outperforming the state-of-art record-setting solar thermoelectric generator.This work reveals the potential of TRD towards 24-hour electricity generation and future renewable energy technology. | ZHANG Xin YANG GuoFeng YAN MengQi ANG Lay Kee ANG Yee Sin CHEN JinCan | 2021 | Science China(Technological Sciences)2021，64，10： | 1 |
| 2 | Nonlinear optical response of graphene in terahertz and near-infrared frequency regime显示文摘在这评论,我们在兆兆赫(THz ) 和在红外线附近的频率政体在 graphene 和它的姐妹结构的非线性的光反应上讨论我们的最近的理论工作。由于象 Dirac 一样线性精力动量分散,在 graphene 的第三顺序的非线性的水流在常规半导体是比那强壮得多的。非线性的水流与增加温度和减少的频率很快成长。第三顺序的非线性的水流能象在 10 的中等电场力量下面的线性水流一样强壮 < 啜 class= “ a-plus-plus ” > 4 V/cm。在有低精力的 bilayer graphene (BLG ) ,三角的变弯效果,不是仅仅光反应是强烈非线性的,光非线性在提高的温度是保存得很好的。面对 bandgap (例如 semihydrogenated graphene (SHG )) ,在那里存在二很好分开的线性回答和非线性的反应达到顶点。这建议 SHG 能在二种颜色的相对紧张能与电场被调节的 THz 频率政体作为二颜色的非线性的材料有一个唯一的潜力。在 Kronig-Penney 的 graphene 超点阵结构打周期的潜力,迪拉克锥椭圆形地被使变形。我们发现光非线性在如此的一个系统被保存不仅,全部的光反应被与乐队 anisotropy 成正比的一个因素进一步提高。这建议那 graphene 超点阵是在 THz 设备申请的另一个潜在的候选人。 | Yee Sin ANG Qinjun CHEN Chao ZHANG | 2015 | Frontiers of Optoelectronics2015，8，1： | 1 |
| 3 | Physics of electron emission and injection in two-dimensional materials: Theory and simulation显示文摘Electrically contacting two-dimensional(2D)materials is an inevitable process in the fabrication of devices for both the study of fundamental nanoscale charge transport physics and the design of high-performance novel electronic and optoelectronic devices.The physics of electrical contact formation and interfacial charge injection critically underlies the performance,energyefficiency and the functionality of 2D-material-based devices,thus representing one of the key factors in determining whether 2D materials can be successfully implemented as a new material basis for the development of nextgeneration beyond-silicon solid-state device technology.In this review,the recent developments in the theory and the computational simulation of electron emission,interfacial charge injection and electrical contact formation in 2D material interfaces,heterostructures,and devices are reviewed.Focusing on thermionic charge injection phenomena which are omnipresent in 2Dmaterials-based metal/semiconductor Schottky contacts,we summarize various transport models and scaling laws recently developed for 2D materials.Recent progress on the first-principle density functional theory simulation of 2D-material-based electrical contacts are also reviewed.This review aims to provide a crystalized summary on the physics of charge injection in the 2D Flatlands for bridging the theoretical and the experimental research communities of 2D material device physics and technology. | Yee Sin Ang Liemao Cao Lay Kee Ang | 2021 | InfoMat2021，3，5： | 0 |
| 4 | Symmetry-driven half-integer conductance quantization in Cobalt–fulvalene sandwich nanowire显示文摘Precise manipulation and monitoring spin transport in one-dimensional (1D) systems is a long-sought goal in the field of nano-spintronics. Based on first-principles calculations, we report the observation of half-integer conductance quantization in the Cobalt-fulvalene sandwich nanowire. Compared with a pure monatomic Cobalt wire, the introduction of fulvalene molecules leads to threeimportant features: Firstly, the strong coupling between the fulvalene and the Cobalt prevents the contamination of the ambientair, ensuring both chemical and physical stabilities;Secondly, the fulvalene symmetry-selectively filters out most of the d-typeorbitals of the Cobalt while leaving a single d-type orbital to form an open spin channel around the Fermi level, which offers amechanism to achieve the observed half-integer conductance;Thirdly, it maintains a superexchange coupling between adjacent Coatoms to achieve a high Curie temperature. Spin transport calculations show that this half-metallic nanowire can serve as a perfectspin filter or a spin valve device, thus revealing the potential of Cobalt-fulvalene sandwich nanowire as a promising building blockof high-performance spintronics technology. | Zhuoling Jiang Kah-Meng Yam Yee Sin Ang Na Guo Yongjie Zhang Hao Wang Chun Zhang | 2023 | npj Computational Materials2023，，1： | 0 |
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