Great Enhancement of Self‐Powered Photoresponse Performance of C 3 H 8 NSi‐TiO 2 NRAs/n‐Si Heterojunction by Build‐In and Build‐Out Electric Field Jointly Promoting Carrier Separation

2020 ◽  
Vol 6 (8) ◽  
pp. 2000501
Author(s):  
Zhidong Hou ◽  
Guixia Li ◽  
Cuicui Ling ◽  
Hongyan Wang ◽  
Lei Zhu ◽  
...  
Keyword(s):  
Electric Field ◽  
Self Powered ◽  
Carrier Separation

Study on water splitting characteristics of CdS nanosheets driven by the coupling effect between photocatalysis and piezoelectricity

Nanoscale ◽  
2019 ◽  
Vol 11 (18) ◽  
pp. 9085-9090 ◽  
Author(s):  
Yan Zhao ◽  
Xueyan Huang ◽  
Fan Gao ◽  
Lulu Zhang ◽  
Qinfen Tian ◽  
...  
Keyword(s):  
Electric Field ◽  
Water Splitting ◽  
Coupling Effect ◽  
Carrier Separation

This study introduces a built-in electric field in a one-component nanosheet to promote photo-generated carrier separation.

Depolarization electric field and poling voltage‐modulated Pb,La(Zr,Ti)O 3 ‐based self‐powered ultraviolet photodetectors

2020 ◽  
Vol 104 (2) ◽  
pp. 928-935
Author(s):  
Ying Zhang ◽  
Jian Chen ◽  
Yixing Cai ◽  
Qingfeng Zhang ◽  
Yinmei Lu ◽  
...  
Keyword(s):  
Electric Field ◽  
Self Powered ◽  
Poling Voltage ◽  
Ultraviolet Photodetectors

An ultra-fast, self-powered and flexible visible-light photodetector based on graphene/Cu2O/Cu gradient heterostructures

2021 ◽  
Author(s):  
Lujia Cong ◽  
Haitao Zhou ◽  
Mingzhu Chen ◽  
Hongbin Wang ◽  
He Chen ◽  
...  
Keyword(s):  
Electric Field ◽  
Visible Light ◽  
Detection Performance ◽  
Excellent Performance ◽  
Light Detection ◽  
Absorption Layer ◽  
Self Powered

Graphene/Cu2O/Cu flexible self-powered photodetector has high visible light detection performance. This excellent performance is attributes to the inherent built-in electric field of the Cu2O absorption layer.

scholarly journals Hot-carrier Separation Induced by the Electric Field of a p-n Junction Between Titanium Dioxide and Nickel Oxide

2020 ◽  
Author(s):  
Keisuke Nakamura ◽  
Tomoya Oshikiri ◽  
Kosei Ueno ◽  
Hiromichi Ohta ◽  
Hiroaki Misawa
Keyword(s):  
Titanium Dioxide ◽  
Electric Field ◽  
Nickel Oxide ◽  
Hot Carrier ◽  
Carrier Separation

Triboelectrification induced self-powered microbial disinfection using nanowire-enhanced localized electric field

2020 ◽  
Author(s):  
Zheng-Yang Huo ◽  
Young Jun Kim ◽  
In-Yong Suh ◽  
Dong-Min Lee ◽  
Jeong Hwan Lee ◽  
...  
Keyword(s):  
Public Health ◽  
Electric Field ◽  
High Performance ◽  
Rational Design ◽  
Mechanical Vibration ◽  
Microbial Inactivation ◽  
Triboelectric Nanogenerator ◽  
Pressure Drops ◽  
Self Powered ◽  
Air Disinfection

Abstract Air-transmitted pathogens may lead to severe epidemics (e.g., COVID-19) showing huge threats to public health. Inactivation of the pathogenic microbes in the air is an essential process, whereas the feasibility of existing air disinfection technologies has encountered obstacles including only achieving physical separation but no inactivation, obvious pressure drops, and energy intensiveness. Here we report a rapid disinfection method for inactivating air-transmitted bacteria and viruses using the nanowire-enhanced localized electric field to damage the outer structures of microbes. This air disinfection system is driven by a triboelectric nanogenerator that converts mechanical vibration to electricity effectively and achieves self-powered. Assisted by a rational design for the accelerated charging and trapping of microbes, this self-powered air disinfection system promotes the microbial transport and achieves high performance: >99.99% microbial inactivation within 0.025s in a fast airflow (2 m/s) while only causing low pressure drops (<24 Pa). This rapid, self-powered air disinfection method may fill the urgent need for the air-transmitted microbial inactivation to protect public health.

scholarly journals Anion-exchange-mediated internal electric field for boosting photogenerated carrier separation and utilization

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tong Han ◽  
Xing Cao ◽  
Kaian Sun ◽  
Qing Peng ◽  
Chenliang Ye ◽  
...  
Keyword(s):  
Electric Field ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Photogenerated Carrier ◽  
Internal Electric Field ◽  
Design And Optimization ◽  
Halide Anions ◽  
Valence Electrons ◽  
Simple Chemical ◽  
Carrier Separation

AbstractHeterojunctions modulated internal electric field (IEF) usually result in suboptimal efficiencies in carrier separation and utilization because of the narrow IEF distribution and long migration paths of photocarriers. In this work, we report distinctive bismuth oxyhydroxide compound nanorods (denoted as BOH NRs) featuring surface-exposed open channels and a simple chemical composition; by simply modifying the bulk anion layers to overcome the limitations of heterojunctions, the bulk IEF could be readily modulated. Benefiting from the unique crystal structure and the localization of valence electrons, the bulk IEF intensity increases with the atomic number of introduced halide anions. Therefore, A low exchange ratio (~10%) with halide anions (I–, Br–, Cl–) gives rise to a prominent elevation in carrier separation efficiency and better photocatalytic performance for benzylamine coupling oxidation. Here, our work offers new insights into the design and optimization of semiconductor photocatalysts.

scholarly journals Anion-Exchange-Mediated Internal Electric Field: Boosting Photogenerated Carrier Separation and Utilization

2020 ◽  
Author(s):  
Yadong Li ◽  
Tong Han ◽  
Xing Cao ◽  
Kaian Sun ◽  
Qing Peng ◽  
...  
Keyword(s):  
Electric Field ◽  
Separation Efficiency ◽  
Photogenerated Carrier ◽  
Internal Electric Field ◽  
Design And Optimization ◽  
Halide Anions ◽  
Valence Electrons ◽  
Simple Chemical ◽  
Carrier Separation ◽  
First Time

Abstract Constructing heterojunctions is a commonly used method for heterogeneous photocatalysts to modulate the internal electric field (IEF); however, this method suffers from narrow IEF distribution (primarily limited at the heterojunction interface) and long migration paths of photocarriers, and therefore results in suboptimal efficiencies in carrier separation and utilization. In this work, we report for the first time novel basic bismuth nitrate compound nanorods (denoted as BOH NRs) featuring surface-exposed open channels and a simple chemical composition; by simply modifying the bulk anion layers to overcome the limitations of heterojunctions, the bulk IEF could be readily modulated. A low exchange ratio (~10%) with halide anions (I–, Br–, Cl–) would give rise to a prominent elevation in carrier separation efficiency; for the reaction of photocatalytic oxidative coupling of benzylamine, the conversions over the modified catalysts are 1.6–2 times as high as that over pristine BOH. Benefiting from the unique crystal structure and the localization of valence electrons, the IEF intensity increases with the atomic number of introduced halide anions, leading to an enhanced efficiency of carrier separation and utilization. Our work here offers new insights into the design and optimization of semiconductor photocatalysts.

Electric field dependent photogenerated charge carrier separation in bipyridine containing poly(p-phenylene vinylene)

2001 ◽  
Vol 121 (1-3) ◽  
pp. 1559-1560 ◽  
Author(s):  
Geetha K. Varier ◽  
K.S. Narayan ◽  
G. Nakmanovich ◽  
Y. Eichen ◽  
E. Ehrenfreund
Keyword(s):  
Charge Carrier ◽  
Electric Field ◽  
Phenylene Vinylene ◽  
Photogenerated Charge Carrier ◽  
Field Dependent ◽  
Carrier Separation
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