Extended visible light harvesting and boosted charge carrier dynamics in heterostructured zirconate–FeS2 photocatalysts for efficient solar water splitting

2018 ◽  
Vol 29 (22) ◽  
pp. 18957-18970 ◽  
Author(s):  
Ali M. Huerta-Flores ◽  
J. M. Mora-Hernández ◽  
Leticia M. Torres-Martínez ◽  
Edgar Moctezuma ◽  
D. Sánchez-Martínez ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Visible Light ◽  
Water Splitting ◽  
Light Harvesting ◽  
Carrier Dynamics ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Carrier Dynamics

Significant Improvements on BiVO4@CoPi Photoanode Solar Water Splitting Performance by Extending Visible-Light Harvesting Capacity and Charge Carrier Transportation

2020 ◽  
Vol 3 (5) ◽  
pp. 4474-4483 ◽  
Author(s):  
D. Amaranatha Reddy ◽  
Yujin Kim ◽  
Hyung Seop Shim ◽  
K. Arun Joshi Reddy ◽  
Madhusudana Gopannagari ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Visible Light ◽  
Water Splitting ◽  
Light Harvesting ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Carrier Transportation

Photoelectrochemistry of Semiconducting Oxide Materials for Solar Water Splitting: Characterization of Charge Carrier Dynamics Using IMPS

2019 ◽  
Author(s):  
Gerko Oskam ◽  
Ingrid Rodríguez-Gutiérrez ◽  
Manuel Rodríguez-Pérez ◽  
Alberto Vega-Poot ◽  
Geonel Rodríguez-Gattorno
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Carrier Dynamics ◽  
Oxide Materials ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Carrier Dynamics

Titania Coated Hematite Nanostructures for Solar Water Splitting Applications

Nano LIFE ◽  
2016 ◽  
Vol 06 (02) ◽  
pp. 1650008 ◽  
Author(s):  
Timur Sh. Atabaev ◽  
Sanjar Atabaev
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Light Harvesting ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Activity ◽  
Solar Water ◽  
Analysis Techniques ◽  
Solar Water Splitting ◽  
Titania Layer ◽  
Carrier Separation

In this study, we report the successful preparation of hematite nanostructures coated with thin titania layer for potential solar water splitting applications. The prepared samples were studied systematically by a range of analysis techniques. We showed that resulting hybrid hematite-titania nanosystem exhibited improved photoelectrochemical activity for solar water splitting compared to the bare hematite only. We also showed that this enhancement was achieved through an improvement in light harvesting and better charge carrier separation. Thus, these findings may open new perspectives for the development of photoelectrodes used in photoelectrochemical water splitting applications.

scholarly journals Electrochemical Fabrication of Cu2O-Nanowires-based Photo-cathodes for Enhanced Solar Water Splitting

2018 ◽  
Author(s):  
Iqra Reyaz Hamdani ◽  
Ashok N. Bhaskarwar
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Light Harvesting ◽  
Radial Distance ◽  
Nanowire Arrays ◽  
Carrier Diffusion ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Carrier Diffusion ◽  
Cu Foil

Solar-power driven photoelectrochemical (PEC) water splitting using semiconductor photoelectrodes is one of the most promising approaches for energy conversion, in terms of production of renewable hydrogen with a minimum carbon footprint. There are, however, enormous challenges to be overcome to obtain sufficient solar water-splitting efficiency, such as over-potential losses due to fast recombination rates of charge carriers, electrode photo-degradation, limited light-harvesting capacities, to name a few. In this work, we report an extensive study on Cu2O based photocathode for hydrogen evolution reaction (HER) in terms of enhancing its solar-to-hydrogen (STH) conversion efficiency, while using low-cost fabrication methods. We have addressed the inefficiency of Cu2O which mainly arises due to incompatible light absorption and charge carrier diffusion lengths, by fabricating highly reproducible Cu2O-nanowire arrays on Cu substrate. The reported optimal thickness of Cu2O for efficient absorption of sunlight is around 2-4 µm, while the minority charge carrier diffusion length is limited to 200-250 nm only. The nanostructured Cu2O, especially in the form of nanowire arrays, improves its performance through morphology control, by improving the light-harvesting capacity along the full length of wire and providing a shorter diffusion path length corresponding to the radial distance in the wire, towards the electrolyte. We prepared the photocathode by anodizing Cu foil to Cu(OH)2 nanowires at 10 mA/cm2, followed by oxidation to Cu2O nanowires in an inert atmosphere. Experimental measurements showed that the process was highly reproducible and resulted in an increased current density from -0.5 mA/cm2 for planar Cu2O to -82.3 mA/cm2 for Cu2O nanowires, both at 0.9 V cathodic bias. The photocurrent density was enhanced from -0.15 mA/cm2 for planar Cu2O to -5.54 mA/cm2 for the nanowire morphology, while using visible light source in all cases. All the photoelectrodes were reproducible in the regime of 4 µm thicknesses of Cu2O nanowires, oxidized over Cu-foil substrates. The STH efficiency calculated for all the fabricated photoelectrodes was as high as 3.54% ± 0.21%, in comparison to 0.24% for the planar Cu2O photoelectrodes.

Carrier Engineering of Zr-mediated Ta3N5 Film as Efficient Photoanode for Solar Water Splitting

2021 ◽  
Author(s):  
Xin Zou ◽  
Xueyang Han ◽  
Chengxiong Wang ◽  
Yunkun Zhao ◽  
Chun Du ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Photoelectrochemical Water Splitting ◽  
Promising Candidate ◽  
Visible Light Absorption ◽  
Solar Water ◽  
Solar Water Splitting

Ta3N5 is regarded as a promising candidate material with adequate visible light absorption and band structure for photoelectrochemical water splitting. However, the performance of Ta3N5 is severely limited by the...

Two photon tandem photoanode with black phosphorous quantum dot sensitized BiVO4 for solar water splitting

2022 ◽  
Author(s):  
Bingjun Jin ◽  
Yoonjun Cho ◽  
Cheolwoo Park ◽  
Jeehun Jeong ◽  
Sungsoon Kim ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Light Harvesting ◽  
Charge Recombination ◽  
Solar Water ◽  
Two Photon ◽  
Solar Water Splitting ◽  
Pec Water Splitting

The photoelectrochemical (PEC) water splitting efficiency is profoundly restricted by the limited light harvesting, rapid charge recombination, and sluggish water oxidation kinetics, in which the construction of a photoelectrode requires...

Time-Resolved Observations of Photo-Generated Charge-Carrier Dynamics in Sb2Se3 Photocathodes for Photoelectrochemical Water Splitting

ACS Nano ◽  
2018 ◽  
Vol 12 (11) ◽  
pp. 11088-11097 ◽  
Author(s):  
Wooseok Yang ◽  
Seungmin Lee ◽  
Hyeok-Chan Kwon ◽  
Jeiwan Tan ◽  
Hyungsoo Lee ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Carrier Dynamics ◽  
Photoelectrochemical Water Splitting ◽  
Time Resolved ◽  
Charge Carrier Dynamics
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