Electricpolarization

Department of Chemistry and Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Hong Kong, China

Endpoint detection and response (EDR) is a system that gathers and analyzes security threat-related information from computer ...

Zhao, D. et al. Boron-doped nitrogen-deficient carbon nitride-based Z-scheme heterostructures for photocatalytic overall water splitting. Nat. Energy 6, 388–397 (2021).

A chief experience officer (CXO) is an executive in the C-suite who ensures positive interactions with an organization's ...

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Circularly polarized light

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Photonpolarization

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Polarization is important in wireless communications systems. The physical orientation of a wireless antenna corresponds to the polarization of the radio waves received or transmitted by that antenna. Thus, a vertical antenna receives and emits vertically polarized waves, and a horizontal antenna receives or emits horizontally polarized waves. The best short-range communications is obtained when the transmitting and receiving (source and destination) antennas have the same polarization. The least efficient short-range communications usually takes place when the two antennas are at right angles (for example, one horizontal and one vertical). Over long distances, the atmosphere can cause the polarization of a radio wave to fluctuate, so the distinction between horizontal and vertical becomes less significant.

A MAC address (media access control address) is a 12-digit hexadecimal number assigned to each device connected to the network.

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Speech recognition, or speech-to-text, is the ability of a machine or program to identify words spoken aloud and convert them ...

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Ellipticalpolarization

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Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Collaborative Innovation Center of Advanced Energy Materials, School of Materials and Energy, Guangdong University of Technology, Guangzhou, China

Zhang, Y., Li, Y., Xin, X. et al. Internal quantum efficiency higher than 100% achieved by combining doping and quantum effects for photocatalytic overall water splitting. Nat Energy 8, 504–514 (2023). https://doi.org/10.1038/s41560-023-01242-7

In general, a framework is a real or conceptual structure intended to serve as a support or guide for the building of something that expands the structure into something useful. See More.

A learning management system (LMS) is a software application or web-based technology used to plan, implement and assess a ...

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Polarization

Employee self-service (ESS) is a widely used human resources technology that enables employees to perform many job-related ...

All data generated in this study are provided in the article, its Supplementary Information and the Source data provided with this paper.

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Qualitative data is descriptive information that focuses on concepts and characteristics, rather than numbers and statistics.

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Polarization, also called wave polarization, is an expression of the orientation of the lines of electric flux in an electromagnetic field ( EM field ). Polarization can be constant -- that is, existing in a particular orientation at all times, or it can rotate with each wave cycle.

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State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, China

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polarization中文

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Some wireless antennas transmit and receive EM waves whose polarization rotates 360 degrees with each complete wave cycle. This type of polarization, called elliptical or circular polarization, can be either clockwise or counterclockwise. The best communications results are obtained when the transmitting and receiving antennas have the same sense of polarization (both clockwise or both counterclockwise). The worst communications usually takes place when the two antennas radiate and receive in the opposite sense (one clockwise and the other counterclockwise).

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Cloud networking is a type of IT infrastructure in which the cloud hosts some or all of an organization's networking resources.

A spam trap is an email address that's used to identify and monitor spam email. It's also a type of honeypot because it uses a ...

Politicalpolarization

This research is supported by the National Natural Science Foundation of China (22261142666, 52172237), the Shaanxi Science Fund for Distinguished Young Scholars (2022JC-21), the Research Fund of the State Key Laboratory of Solidification Processing (NPU), China (grant no. 2021-QZ-02) and the Fundamental Research Funds for the Central Universities (3102019JC005, D5000220033). All funds were awarded to X.L. We thank the members of the Analytical and Testing Center of Northwestern Polytechnical University for help with X-ray diffraction, XPS and SEM characterization.

Sun, X. et al. Enhanced superoxide generation on defective surfaces for selective photooxidation. J. Am. Chem. Soc. 141, 3797 (2019).

Polarization affects the propagation of EM fields at infrared ( IR ), visible, ultraviolet ( UV ), and even X-ray wavelength s. In ordinary visible light, there are numerous wave components at random polarization angles. When such light is passed through a special filter, the filter blocks all light except that having a certain polarization. When two polarizing filters are placed so a ray of light passes through them both, the amount of light transmitted depends on the angle of the polarizing filters with respect to each other. The most light is transmitted when the two filters are oriented so they polarize light in the same direction. The least light is transmitted when the filters are oriented at right angles to each other.

Pan, Z., Zhang, G. & Wang, X. Polymeric carbon nitride/reduced graphene oxide/Fe2O3: all-solid-state Z-scheme system for photocatalytic overall water splitting. Angew. Chem. Int. Ed. 58, 7102–7106 (2019).

polarization极化

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Chen, X., Wang, J., Chai, Y., Zhang, Z. & Zhu, Y. Efficient photocatalytic overall water splitting induced by the giant internal electric field of a g-C3N4/rGO/PDIP Z-scheme heterojunction. Adv. Mater. 33, 2007479 (2021).

Multiple exciton generation (MEG), where two or more electron–hole pairs are produced from the absorption of one high-energy photon, could increase the efficiency of light absorbing devices. However, demonstrations of the effect are still scarce in photocatalytic hydrogen production. Moreover, many photocatalytic systems for overall water splitting suffer from poor charge carrier separation. Here we show that a CdTe quantum dot/vanadium-doped indium sulphide (CdTe/V-In2S3) photocatalyst has a built-in electric field and cascade energy band structure sufficient to effectively extract excitons and separate carriers, allowing MEG to be exploited for hydrogen production. We achieve a tunable energy band structure through quantum effects in CdTe and doping engineering of V-In2S3, which induces a 14-fold enhancement in the CdTe/V-In2S3 interfacial built-in electric field intensity relative to pristine CdTe/V-In2S3. We report an internal quantum efficiency of 114% at 350 nm for photocatalytic hydrogen production, demonstrating the utilization of MEG effects. The solar-to-hydrogen efficiency is 1.31%.

X.L. and Y.Z. proposed the experimental concepts, designed the experiments and prepared the paper. X.L. supervised the project. Y.Z., X.X., Y.W., P.G., R.W. and B.W. carried out the experiments and conducted the materials characterization. W.H. and A.J.S. revised the paper. Y.L. finished the computation. All authors discussed the results and approved the final version of the paper.

Materials Research Institute, School of Engineering and Materials Science, Faculty of Science and Engineering, Queen Mary University of London, London, UK

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