scholarly journals Vapor-Transport Synthesis and Annealing Study of ZnxMg1–xO Nanowire Arrays for Selective, Solar-Blind UV-C Detection

ACS Omega ◽  
2018 ◽  
Vol 3 (5) ◽  
pp. 4899-4907 ◽  
Author(s):  
Ebraheem Ali Azhar ◽  
Jignesh Vanjaria ◽  
Seungho Ahn ◽  
Thomas Fou ◽  
Sandwip K. Dey ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Vapor Transport ◽  
Solar Blind ◽  
Annealing Study ◽  
Uv C

scholarly journals Solar-blind ultraviolet photodetector based on vertically aligned single-crystalline β-Ga2O3 nanowire arrays

Nanophotonics ◽  
2020 ◽  
Vol 9 (15) ◽  
pp. 4497-4503
Author(s):  
Liying Zhang ◽  
Xiangqian Xiu ◽  
Yuewen Li ◽  
Yuxia Zhu ◽  
Xuemei Hua ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Light Trapping ◽  
High Surface ◽  
Volume Ratio ◽  
Average Diameter ◽  
Nanowire Arrays ◽  
Etching Technique ◽  
Inductively Coupled ◽  
Solar Blind ◽  
Vertically Aligned

AbstractVertically aligned nanowire arrays, with high surface-to-volume ratio and efficient light-trapping absorption, have attracted much attention for photoelectric devices. In this paper, vertical β-Ga2O3 nanowire arrays with an average diameter/height of 110/450 nm have been fabricated by the inductively coupled plasma etching technique. Then a metal-semiconductor-metal structured solar-blind photodetector (PD) has been fabricated by depositing interdigital Ti/Au electrodes on the nanowire arrays. The fabricated β-Ga2O3 nanowire PD exhibits ∼10 times higher photocurrent and responsivity than the corresponding film PD. Moreover, it also possesses a high photocurrent to dark current ratio (Ilight/Idark) of ∼104 and a ultraviolet/visible rejection ratio (R260 nm/R400 nm) of 3.5 × 103 along with millisecond-level photoresponse times.

Enhanced-Performance Self-Powered Solar-Blind UV-C Photodetector Based on n-ZnO Quantum Dots Functionalized by p-CuO Micro-pyramids

2021 ◽  
Author(s):  
Norah Alwadai ◽  
Somak Mitra ◽  
Mohamed Nejib Hedhili ◽  
Hadeel Alamoudi ◽  
Bin Xin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Blind ◽  
Zno Quantum Dots ◽  
Self Powered ◽  
Uv C

scholarly journals Solar-blind ultraviolet photodetector based on graphene/vertical Ga2O3 nanowire array heterojunction

Nanophotonics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 1557-1562 ◽  
Author(s):  
Tao He ◽  
Yukun Zhao ◽  
Xiaodong Zhang ◽  
Wenkui Lin ◽  
Kai Fu ◽  
...  
Keyword(s):  
Response Times ◽  
Nanowire Array ◽  
Graphene Film ◽  
Fast Response ◽  
Nanowire Arrays ◽  
Monolayer Graphene ◽  
Ultraviolet Photodetector ◽  
Solar Blind ◽  
Decay Times ◽  
First Time

AbstractIn this paper, a solar-blind ultraviolet photodetector (PD) based on the graphene/vertical Ga2O3 nanowire array heterojunction was proposed and demonstrated. To the best of our knowledge, it is the first time that vertical Ga2O3 nanowire arrays have been realized. Ga2O3 nanowires were obtained by thermally oxidizing GaN nanowires grown by molecular beam epitaxy on n-doped Si substrate. Then, a monolayer graphene film was transferred to Ga2O3 nanowires to form the graphene/vertical Ga2O3 nanowire array heterojunction and transparent electrodes. The fabricated device exhibited a responsivity (R) of 0.185 A/W and rejection ratio (R258 nm/R365 nm) of 3×104 at the bias of −5 V. Moreover, the fast response times of this PD were 9 and 8 ms for the rise and decay times under 254 nm illumination, respectively, which are attributed to the unique properties of nanowire arrays and the graphene/vertical Ga2O3 nanowire array heterojunction structure.

Self-Powered Solar-Blind Ultrafast UV-C Diamond Detectors with Asymmetric Schottky Contacts

2021 ◽  
Author(s):  
Marco Girolami ◽  
Valerio Serpente ◽  
Matteo Mastellone ◽  
Marco Tardocchi ◽  
Marica Rebai ◽  
...  
Keyword(s):  
Schottky Contacts ◽  
Solar Blind ◽  
Self Powered ◽  
Uv C

Current Advances in Solar-blind Photodetection Technology: Using Ga2O3 & AlGaN

2022 ◽  
Author(s):  
Urvashi Varshney ◽  
Neha Aggarwal ◽  
Govind Gupta
Keyword(s):  
Solar Blind ◽  
The World ◽  
Ultraviolet C ◽  
Novel Coronavirus ◽  
Uv C

Different variants of novel coronavirus disease are spreading and emerging rapidly all over the world causing a health pandemic. With this sudden outbreak, ultraviolet-C (UV-C) sterilizing devices are being significantly...

Vertically aligned ZnO/Ga2O3 core/shell nanowire arrays as self-driven superior sensitivity solar-blind photodetectors

2019 ◽  
Vol 7 (10) ◽  
pp. 3056-3063 ◽  
Author(s):  
Daotong You ◽  
Chunxiang Xu ◽  
Jie Zhao ◽  
Wei Zhang ◽  
Feifei Qin ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Core Shell ◽  
Solar Blind ◽  
Vertically Aligned

Well-aligned ZnO/Ga2O3 core/shell nanowire arrays were fabricated by VPT and the sputtering method as self-driven solar-blind photodetectors.

ZnO-CdZnS Core-Shell Nanocable Arrays for Highly Efficient Photoelectrochemical Hydrogen Generation

2010 ◽  
Vol 1256 ◽  
Author(s):  
Yoon Myung ◽  
Dong Myung Jang ◽  
Yong Jei Sohn ◽  
Tae Kwang Sung ◽  
Gyeong Bok Jung ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Nanowire Arrays ◽  
Vapor Transport ◽  
Photoelectrochemical Cell ◽  
Core Shell ◽  
Zno Nanowire ◽  
Large Area ◽  
Vertically Aligned ◽  
Transport Method ◽  
Vapor Transport Method

AbstractHigh-density TiO2-CdS and ZnO-CdS core-shell nanocable arrays were synthesized on large-area Ti substrates. The CdS layers were deposited on the pre-grown vertically-aligned TiO2 (rutile) and ZnO nanowire arrays, with a controlled thickness (10~50 nm), using the vapor transport method. The ZnO-CdS nanocables consisted of single-crystalline wurtzite CdS shells whose [001] direction was aligned along the [001] wire axis of the wurtzite ZnO core, which is distinctive from the polycrystalline shell of the TiO2-CdS nanocables. We fabricated the photoelectrochemical cell using the ZnO-CdS photoelectrode exhibits much more efficient hydrogen generation than that using the TiO2-CdS one.

scholarly journals Self-powered solar-blind α-Ga2O3 thin-film UV-C photodiode grown by halide vapor-phase epitaxy

APL Materials ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 101108
Author(s):  
Jinho Bae ◽  
Ji-Hyeon Park ◽  
Dae-Woo Jeon ◽  
Jihyun Kim
Keyword(s):  
Thin Film ◽  
Vapor Phase ◽  
Vapor Phase Epitaxy ◽  
Ga2o3 Thin Film ◽  
Solar Blind ◽  
Self Powered ◽  
Uv C

Self-powered solar-blind ultrafast UV-C diamond detectors with asymmetric Schottky contacts

Carbon ◽  
2021 ◽  
Author(s):  
Marco Girolami ◽  
Valerio Serpente ◽  
Matteo Mastellone ◽  
Marco Tardocchi ◽  
Marica Rebai ◽  
...  
Keyword(s):  
Schottky Contacts ◽  
Solar Blind ◽  
Self Powered ◽  
Uv C

SCALE PHYSICAL MODELING METHOD OF THE UV-C BAND COMMUNICATION SYSTEM

2020 ◽  
Vol 6 ◽  
pp. 141-147
Author(s):  
G.S. VASILIEV ◽  
O.R. KUZICHKIN ◽  
D.I. SURZHIK ◽  
I.S. KONSTANTINOV
Keyword(s):  
Communication System ◽  
Physical Modeling ◽  
Communication Systems ◽  
Large Scale ◽  
Initial Conditions ◽  
Signal To Noise Ratio ◽  
Scale Model ◽  
Filter Model ◽  
Solar Blind ◽  
Uv C

Communication systems of the solar-blind ultraviolet range UV-C from 200 to 280 nm enable communication in the absence of line of sight due to the strong scattering of UV radiation in the atmosphere. Creating a full-scale model of the UV communication system at the initial stage of technical implementation can be extremely difficult due to the high requirements for the components of the optical receiver and transmitter. An urgent task is to develop a technique for large-scale physical modeling of the UV-C coupling system, which allows evaluating the performance of the system under new conditions with new components based on experimental results obtained for initial conditions with initial components. Based on the analytical model of the UV communication system, a signal-to-noise ratio (SNR) conversion coefficient is introduced in the new system compared to the original one. The simulation of the UV communication system with varying light levels and the solar-blind filter model showed the effectiveness of the proposed method for simplifying the implementation of the UV communication system.

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