Vacuum-filtration enabled large-area CsPbBr3 films on porous substrates for flexible photodetectors

2019 ◽  
Vol 7 (43) ◽  
pp. 13402-13409 ◽  
Author(s):  
Qishuo Tan ◽  
Guo Ye ◽  
Yan Zhang ◽  
Xiaojia Du ◽  
Haining Liu ◽  
...  
Keyword(s):  
Large Area ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Inorganic Perovskite ◽  
One Step ◽  
Flexible Photodetector ◽  
Photodetector Arrays ◽  
Porous Substrates

Here, we report a vacuum-filtration method to produce centimeter-scale continuous polycrystalline inorganic perovskite (CsPbBr3) film directly on flexible porous substrates in one step, and demonstrate large-area flexible photodetector arrays.

Synthesis and Characterization of Reduced Graphene Oxide Film as Electronic Material

2011 ◽  
Vol 287-290 ◽  
pp. 2356-2359
Author(s):  
Juan Yang ◽  
Chuan Liang Zang ◽  
Lei Sun ◽  
Nan Zhao ◽  
Ya Zhou Zhou
Keyword(s):  
Graphene Oxide ◽  
Raw Materials ◽  
Large Area ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Structure And Morphology ◽  
Reduced Graphene ◽  
Thermal Annealing Process ◽  
Ft Ir

Large area graphene oxide (GO) film was prepared by vacuum filtration method through a membrane with a pore size of 25 nm, using GO sheets suspension as raw materials. The film was thermal treated in Ar/H2 atmosphere at 600°C to make the film electrical conductive. The structure and morphology of the obtained film were investigated by XRD, Raman, FT-IR and SEM. Results showed that most oxygen-containing functional groups in GO film were reduced during the thermal annealing process. The obtained reduced film showed excellent electrical conductivity and the average sheet resistance of the reduced film was 11.3 Ω□-1.

Large-area CsPbBr3 perovskite films grown with effective one-step RF-magnetron sputtering

2021 ◽  
Vol 129 (24) ◽  
pp. 245303
Author(s):  
Fan Xu ◽  
Yujiao Li ◽  
Beilei Yuan ◽  
Yongzheng Zhang ◽  
Haoming Wei ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Rf Magnetron Sputtering ◽  
Large Area ◽  
One Step

scholarly journals The Photodetectors Based on Lateral Monolayer MoS2/WS2 Heterojunctions

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Caihong Li ◽  
Juntong Zhu ◽  
Wen Du ◽  
Yixuan Huang ◽  
Hao Xu ◽  
...  
Keyword(s):  
Communication Systems ◽  
Transition Metal Dichalcogenides ◽  
Chemical Vapor ◽  
Large Area ◽  
Optical Signals ◽  
Metal Dichalcogenides ◽  
One Step ◽  
The One ◽  
Charge Carrier Trapping ◽  
Sharp Interfaces

AbstractMonolayer transition metal dichalcogenides (TMDs) show promising potential for next-generation optoelectronics due to excellent light capturing and photodetection capabilities. Photodetectors, as important components of sensing, imaging and communication systems, are able to perceive and convert optical signals to electrical signals. Herein, the large-area and high-quality lateral monolayer MoS2/WS2 heterojunctions were synthesized via the one-step liquid-phase chemical vapor deposition approach. Systematic characterization measurements have verified good uniformity and sharp interfaces of the channel materials. As a result, the photodetectors enhanced by the photogating effect can deliver competitive performance, including responsivity of ~ 567.6 A/W and detectivity of ~ 7.17 × 1011 Jones. In addition, the 1/f noise obtained from the current power spectrum is not conductive to the development of photodetectors, which is considered as originating from charge carrier trapping/detrapping. Therefore, this work may contribute to efficient optoelectronic devices based on lateral monolayer TMD heterostructures.

Influence of Impregnation-Vacuum Filtration Conditions on Ni Dispersion and Activity of Ni-Cordierite for Hydrogenation

2013 ◽  
Vol 781-784 ◽  
pp. 312-319
Author(s):  
Shao Wen Liu ◽  
Zhuo Long Guan ◽  
Lei Qing ◽  
Jiu Ling Chen ◽  
Hai Nan Wang ◽  
...  
Keyword(s):  
Solution Concentration ◽  
Catalytic Performance ◽  
Filtration Time ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Structured Catalysts ◽  
Preparation Conditions ◽  
Vacuum Degree ◽  
Close Relationship ◽  
Impregnation Time

The influence of the preparation conditions of the impregnation-vacuum filtration method was investigated systematically on the Ni dispersion and the activity of Ni-cordierite structured catalysts in hydrogenation of m-dinitrobenzene to m-phenylenediamine. H2-TPD measurement showed that the Ni dispersion has close relationship with the impregnation solution concentration of nickel nitrate, the impregnation time, the vacuum degree, the vacuum filtration time and the calcination temperature. The hydrogenation activity test and nitrogen physisorption investigation showed that the catalytic performance of Ni-cordierite is dependent upon the Ni dispersion and the chemisorption mode of m-dinitrobenzene on Ni particles.

An ultrafast-temporally-responsive flexible photodetector with high sensitivity based on high-crystallinity organic–inorganic perovskite nanoflake

Nanoscale ◽  
2017 ◽  
Vol 9 (34) ◽  
pp. 12718-12726 ◽  
Author(s):  
Wei Zheng ◽  
Richeng Lin ◽  
Zhaojun Zhang ◽  
Qixian Liao ◽  
Jiajun Liu ◽  
...  
Keyword(s):  
Early Warning ◽  
High Sensitivity ◽  
Wearable Devices ◽  
Inorganic Perovskite ◽  
High Crystallinity ◽  
Security Personnel ◽  
Flexible Photodetector

Flexible cameras are important early warning wearable devices to protect security personnel from dangerous events.

scholarly journals Low Vacuum Filtration Method as an Alternative Extracellular Vesicle Concentration Method: Comparison with Ultracentrifugation and Differential Centrifugation

2020 ◽  
Author(s):  
Anna Drożdż ◽  
Agnieszka Kamińska ◽  
Magdalena Surman ◽  
Agnieszka Gonet-Surówka ◽  
Robert Jach ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Culture Media ◽  
Membrane Surface ◽  
Method Comparison ◽  
Environmental Scanning Electron Microscopy ◽  
Drug Carriers ◽  
Differential Centrifugation ◽  
Isolation Method ◽  
Filtration Method ◽  
Vacuum Filtration

Recent years brought great focus in the field of development of extracellular vesicles (EVs) based drug-delivery systems. Considering possible applications of EVs as a drug carriers the isolation process is a crucial step. To solve problems related with EV isolation, we created and validated a new EVs isolation method – Low Vacuum Filtration (LVF) and compared it with two commonly applied procedures - differential centrifugation (DC) and ultracentrifugation (UC). EVs isolated from endothelial cells culture media have been characterized by a) transmission electron microscopy (TEM) b) nanoparticle tracking analysis (NTA), c) western blot and d) Fourier-Transform Infrared Spectroscopy (FTIR). Additionally, the membrane surface have been imaged with Environmental Scanning Electron Microscopy (ESEM). We showed that LVF is reproducible and efficient method for EVs isolation form conditioned media. Additionally, we observed correlation between ATR-FTIR spectra quality and the EVs and proteins concentration. ESEM imaging confirmed that actual pore diameter are close to the values calculated theoretically. LVF method is an easy, fast and inexpensive EVs isolation method which allows for isolation of both ectosomes and exosomes from high volume sources with good repeatability. We think that it could be an efficient alternative for commonly applied methods.

scholarly journals Fabrication of Silver Nanowire/Polydimethylsiloxane Dry Electrodes by a Vacuum Filtration Method for Electrophysiological Signal Monitoring

ACS Omega ◽  
2020 ◽  
Vol 5 (18) ◽  
pp. 10260-10265 ◽  
Author(s):  
Ravinder Reddy Kisannagar ◽  
Pallavi Jha ◽  
Ambuja Navalkar ◽  
Samir K. Maji ◽  
Dipti Gupta
Keyword(s):  
Silver Nanowire ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Dry Electrodes ◽  
Signal Monitoring ◽  
Electrophysiological Signal

Printed High‐Density and Flexible Photodetector Arrays via Size‐matched Heterogeneous Micro‐/Nanostructure

2020 ◽  
Vol 8 (15) ◽  
pp. 2000370
Author(s):  
Qi Pan ◽  
Sisi Chen ◽  
Meng Su ◽  
Pengwei Li ◽  
Zeying Zhang ◽  
...  
Keyword(s):  
High Density ◽  
Flexible Photodetector ◽  
Photodetector Arrays

One-step solution deposition of CsPbBr3 based on precursor engineering for efficient all-inorganic perovskite solar cells

2019 ◽  
Vol 7 (39) ◽  
pp. 22420-22428 ◽  
Author(s):  
Dewei Huang ◽  
Pengfei Xie ◽  
Zhenxiao Pan ◽  
Huashang Rao ◽  
Xinhua Zhong
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Solution Deposition ◽  
Inorganic Perovskite ◽  
One Step ◽  
Novel Strategy ◽  
Precursor Engineering

A novel strategy of adopting cesium acetate and methylammonium acetate increases the concentration of CsPbBr3 precursor solution assisting one-step deposition.

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