A visualizable means for verifying the manner of charge transfer in WO3-based type-II heterostructures

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7825-7832 ◽  
Author(s):  
Lulu Zhang ◽  
Jie Yuan ◽  
Cankun Jiang ◽  
Xueyan Huang ◽  
Yan Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Carrier ◽  
Type Ii ◽  
Carrier Transfer

Research into photocatalytic mechanisms and charge carrier transfer is of vital significance.

Towards direct enzyme wiring: a theoretical investigation of charge carrier transfer mechanisms between glucose oxidase and organic semiconductors

2019 ◽  
Vol 21 (6) ◽  
pp. 2968-2976 ◽  
Author(s):  
Gintautas Bagdžiūnas ◽  
Arūnas Ramanavičius
Keyword(s):  
Charge Transfer ◽  
Charge Carrier ◽  
Glucose Oxidase ◽  
Organic Semiconductors ◽  
Theoretical Investigation ◽  
Glucose Biosensors ◽  
Carrier Transfer ◽  
Amperometric Glucose Biosensors ◽  
Transfer Mechanisms

We have evaluated charge transfer between enzyme glucose oxidase (GOx) and organic semiconductors, both of which were applied in the design of amperometric glucose biosensors.

NiS co-catalyst decorated Zn3In2S6/g-C3N4 type-II ball-flower like nanosphere heterojunction for efficient photocatalytic hydrogen production

2021 ◽  
Author(s):  
Xiang-yin Ji ◽  
Rui-tang Guo ◽  
Zhi-dong Lin ◽  
Long-fei Hong ◽  
Ye Yuan ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Charge Carrier ◽  
Hydrothermal Method ◽  
Type Ii ◽  
Electron Hole ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Production ◽  
Carrier Transfer

Promoting the separation of photo-generated electron-hole pairs and enhancing the charge carrier transfer are critical in photocatalysis. In our work, ball-flower like NiS/Zn3In2S6/g-C3N4 photocatalyst fabricated by hydrothermal method exhibited superior...

Lead-Free Metal Halide Perovskite Nanocrystals for Photocatalysis in Water

2019 ◽  
Author(s):  
Subhajit Bhattacharjee ◽  
Sonu Pratap Chaudhary ◽  
Sayan Bhattacharyya
Keyword(s):  
Charge Carrier ◽  
Wide Spectrum ◽  
Real Life ◽  
Metal Halide ◽  
Lead Free ◽  
Water Medium ◽  
Type I ◽  
Type Ii ◽  
Perovskite Layer ◽  
Halide Perovskites

<p>Metal halide perovskites with high absorption coefficient, direct generation of free charge carriers, excellent ambipolar charge carrier transport properties, point-defect tolerance, compositional versatility and solution processability are potentially transforming the photovoltaics and optoelectronics industries. However their limited ambient stability, particularly those of iodide perovskites, obscures their use as photocatalysts especially in aqueous medium. In an unprecedented approach we have exploited the photo-absorption property of the less toxic lead-free Cs<sub>3</sub>Bi<sub>2</sub>X<sub>9 </sub>(X = Br, I) nanocrystals (NCs) to catalyse the degradation of water pollutant organic dye, methylene blue (MB) in presence of visible light at room temperature. After providing a proof-of-concept with bromide perovskites in isopropanol, the perovskites are employed as photocatalysts in water medium by designing perovskite/Ag<sub>2</sub>S and perovskite/TiO<sub>2 </sub>composite systems, with Type I (or quasi Type II) and Type II alignments, respectively. Ag<sub>2</sub>S and TiO<sub>2</sub> coatings decelerate penetration of water into the perovskite layer while facilitating charge carrier extraction. With a minimal NC loading, Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub>/Ag<sub>2</sub>S degrades ~90% MB within an hour. Our approach has the potential to unravel the photocatalytic properties of metal halide perovskites for a wide spectrum of real-life applications. </p>

scholarly journals Deciphering the role of quantum dot size in the ultrafast charge carrier dynamics at the perovskite–quantum dot interface

2020 ◽  
Vol 8 (42) ◽  
pp. 14834-14844
Author(s):  
Piotr Piatkowski ◽  
Sofia Masi ◽  
Pavel Galar ◽  
Mario Gutiérrez ◽  
Thi Tuyen Ngo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Charge Carrier ◽  
Rate Constants ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Carrier Transfer ◽  
Charge Carrier Dynamics ◽  
Conduction Bands

Charge-carrier transfer (CT) from the perovskite host to PbS QDs were studied using fs-transient absorption and THz techniques. The CT rate constants increase with the size of QDs due to a change in the position of valence and conduction bands in PbS QDs.

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