scholarly journals Easy Fabrication of Performant SWCNT-Si Photodetector

Electronics ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 271
Author(s):  
Daniele Capista ◽  
Maurizio Passacantando ◽  
Luca Lozzi ◽  
Enver Faella ◽  
Filippo Giubileo ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Carbon Nanotube ◽  
Light Intensity ◽  
Vapor Deposition ◽  
Incident Light ◽  
Chemical Vapor ◽  
Visible Range ◽  
Sensitive Area ◽  
Incident Light Intensity ◽  
Simple Method

We propose a simple method to fabricate a photodetector based on the carbon nanotube/silicon nitride/silicon (CNT/Si3N4/Si) heterojunction. The device is obtained by depositing a freestanding single-wall carbon nanotube (SWCNT) film on a silicon substrate using a dry transfer technique. The SWCNT/Si3N4/Si heterojunction is formed without the thermal stress of chemical vapor deposition used for the growth of CNTs in other approaches. The CNT film works as a transparent charge collecting electrode and guarantees a uniform photocurrent across the sensitive area of the device. The obtained photodetector shows a great photocurrent that increases linearly with the incident light intensity and grows with the increasing wavelength in the visible range. The external quantum efficiency is independent of the light intensity and increases with the wavelength, reaching 65% at 640 nm.

Strain and Photovoltaic Sensitivities of Dumbbell-Shape GNR-Base Sensors

2019 ◽  
Author(s):  
Jowesh Avisheik Goundar ◽  
Takuya Kudo ◽  
Qinqiang Zhang ◽  
Ken Suzuki ◽  
Hideo Miura
Keyword(s):  
Vapor Deposition ◽  
Tensile Strain ◽  
Incident Light ◽  
Chemical Vapor ◽  
Strain Sensors ◽  
Gauge Factor ◽  
Uniaxial Tensile ◽  
Incident Light Intensity ◽  
Highly Sensitive ◽  
Electronic Behavior

Abstract The area-arrayed dumbbell-shape Graphene Nano-Ribbons (GNRs) were fabricated by using chemical vapor deposition and photolithography technologies. The electronic behavior of the fabricated GNR-FET structure was evaluated for its photonic properties with an incident light intensity of 1-mW. The 200-nm wide GNRs structure showed metallic properties, while those with the width of 40 nm showed semiconductive properties as was expected. The light-induced photocurrent was observed in all the fabricated GNRs structures. The average photocurrent observed in the 2-mm wide graphene structure was 3.3 A/m2 and that observed in the 40-nm wide area-arrayed GNRs structure was 261 A/m2, respectively. Based on this photocurrent, the external photosensitivity of the 40-nm wide GNRs structure was about 2.6 × 105 A/W.m2 and this value was much larger than that of conventional Si-base solar cells. In addition, the effect of strain on the resistivity of GNRs was measured. Uniaxial tensile strain was applied to the area-arrayed GNRs structures with the width from 200 nm to 40 nm. The gauge factor obtained from the GNRs with the width wider than 100 nm was about 3, and that with the width of 40 nm was about 160. Therefore, highly-sensitive strain sensors can be realized by using GNRs thinner than 70 nm.

Partial Emergence of the Bivalve Donax Vittatus in Response to Abrupt Changes in Light Intensity and before Spawning

1998 ◽  
Vol 78 (2) ◽  
pp. 669-672 ◽  
Author(s):  
Alan D. Ansell ◽  
Carmen-Pia Günther ◽  
Michael T. Burrows
Keyword(s):  
Light Intensity ◽  
Incident Light ◽  
Visible Range ◽  
Upward Movement ◽  
Incident Light Intensity ◽  
Normal Position ◽  
Subsequent Removal ◽  
Video Recordings ◽  
Abrupt Changes

Buried individuals of the bivalve Donax vittatus (Bivalvia: Donacidae) respond to change in incident light intensity by adjusting their position in the sediment. Video recordings of activity in aquarium tanks in natural daylight revealed that individuals responded to shading by moving upwards, causing some to partially emerge from the sand. Subsequent removal of the shading stimulated reburial to the normal position. Recordings in laboratory aquaria show similar upward movement and partial emergence occurring when illumination in the visible range is switched off. Upward movement and partial emergence of D. vittatus has also been observed to take place prior to spawning.

scholarly journals All organic multiferroic magnetoelectric complexes with strong interfacial spin-dipole interaction

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Yuying Yang ◽  
Zhiyan Chen ◽  
Xiangqian Lu ◽  
Xiaotao Hao ◽  
Wei Qin
Keyword(s):  
Magnetic Field ◽  
Light Intensity ◽  
Room Temperature ◽  
Incident Light ◽  
Dipole Interaction ◽  
Interfacial Interaction ◽  
Magnetoelectric Coupling ◽  
Incident Light Intensity ◽  
Organic Ferromagnets ◽  
Magnetoelectric Coefficient

AbstractThe organic magnetoelectric complexes are beneficial for the development on flexible magnetoelectric devices in the future. In this work, we fabricated all organic multiferroic ferromagnetic/ferroelectric complexes to study magnetoelectric coupling at room temperature. Under the stimulus of external magnetic field, the localization of charge inside organic ferromagnets will be enhanced to affect spin–dipole interaction at organic multiferroic interfaces, where overall ferroelectric polarization is tuned to present an organic magnetoelectric coupling. Moreover, the magnetoelectric coupling of the organic ferromagnetic/ferroelectric complex is tightly dependent on incident light intensity. Decreasing light intensity, the dominated interfacial interaction will switch from spin–dipole to dipole–dipole interaction, which leads to the magnetoelectric coefficient changing from positive to negative in organic multiferroic magnetoelectric complexes.

A renewable photocatalytic system with dramatic photocatalytic activity for H2 evolution and constant light energy utilization: Eosin Y sensitized ZnWO4 nanoplates loaded with CuO nanoparticles

2021 ◽  
Author(s):  
Xiaoluo Bao ◽  
Xiaokun Wang ◽  
Xiangqing Li ◽  
Lixia Qin ◽  
Taiyang Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Light Intensity ◽  
Incident Light ◽  
Cuo Nanoparticles ◽  
Energy Utilization ◽  
Limited Attention ◽  
Eosin Y ◽  
H2 Evolution ◽  
Incident Light Intensity ◽  
Photocatalytic System

It is necessary for the commercialization of sunlight-driven H2 evolution to develop an efficient photocatalytic system whose energy utilization is independent on incident light intensity. Unfortunately, limited attention has been...

Highly Efficient Field Emission from Carbon Nanotube−Nanohorn Hybrids Prepared by Chemical Vapor Deposition

ACS Nano ◽  
2010 ◽  
Vol 4 (12) ◽  
pp. 7337-7343 ◽  
Author(s):  
Ryota Yuge ◽  
Jin Miyawaki ◽  
Toshinari Ichihashi ◽  
Sadanori Kuroshima ◽  
Tsutomu Yoshitake ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Field Emission ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Highly Efficient

Synthesis of single-crystalline GeS nanoribbons for high sensitivity visible-light photodetectors

2015 ◽  
Vol 3 (31) ◽  
pp. 8074-8079 ◽  
Author(s):  
Changyong Lan ◽  
Chun Li ◽  
Yi Yin ◽  
Huayang Guo ◽  
Shuai Wang
Keyword(s):  
Visible Light ◽  
Vapor Deposition ◽  
High Performance ◽  
Incident Light ◽  
Chemical Vapor ◽  
High Sensitivity ◽  
Single Crystalline ◽  
Promising Application ◽  
Photo Detection ◽  
First Time

Single-crystalline GeS nanoribbons were synthesized by chemical vapor deposition for the first time. The nanoribbon photodetectors respond to the entire visible incident light with a response edge at around 750 nm and a high responsivity, indicating their promising application for high performance broadband visible-light photo-detection.

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