Imaging photogenerated charge carriers on surfaces and interfaces of photocatalysts with surface photovoltage microscopy

2018 ◽  
Vol 47 (22) ◽  
pp. 8238-8262 ◽  
Author(s):  
Ruotian Chen ◽  
Fengtao Fan ◽  
Thomas Dittrich ◽  
Can Li
Keyword(s):  
Charge Separation ◽  
Charge Carriers ◽  
Surface Photovoltage ◽  
Surface Photovoltage Spectroscopy ◽  
Surfaces And Interfaces ◽  
Recent Advances

Recent advances in imaging and characterizing charge separation on surfaces and interfaces of photocatalysts by surface photovoltage spectroscopy were reviewed and highlighted.

Development of Novel Photoelectrode Materials with Improved Charge Separation Properties

2014 ◽  
Vol 975 ◽  
pp. 224-229 ◽  
Author(s):  
Leigh Russell Sheppard ◽  
Marta Bello Lamo ◽  
Thomas Dittrich ◽  
Richard Wuhrer
Keyword(s):  
Photoelectron Spectroscopy ◽  
Charge Separation ◽  
Secondary Ion Mass Spectrometry ◽  
Surface Region ◽  
Charge Carriers ◽  
Near Surface ◽  
Surface Photovoltage Spectroscopy ◽  
Related Defect ◽  
Compositional Gradients ◽  
Secondary Ion

This investigation was aimed at identifing the scope for exploiting segregation phenomena to improve the ability of doped TiO2 to separate photo-generated charge carriers. By applying several controlled conditions of temperature and oxygen activity during the annealing of Nb-doped TiO2 (0.65 at. %), compositional gradients were imposed within the surface and near-surface regions due to solute segregation. These compositional gradients were characterised using secondary ion mass spectrometry (SIMS) and Xray photoelectron spectroscopy (XPS), and then tested for charge separation abilities using surface photovoltage spectroscopy (SPS). This investigation has revealed that processing Nb-doped TiO2 under conditions that favour the depletion of Nb from the surface and near-surface region yields stronger charge separation. While this is attributed to the formation of a homo-junction that is providing additional driving force for charge separation, the altered impact of Nb5+ and related defect disorder may also play a role. This investigation has provided encouraging preliminary outcomes to stimulate further investigations.

Charge Separation in Type II Tunneling Multilayered Structures of CdTe and CdSe Nanocrystals Directly Proven by Surface Photovoltage Spectroscopy

2010 ◽  
Vol 132 (17) ◽  
pp. 5981-5983 ◽  
Author(s):  
Dieter Gross ◽  
Iván Mora-Seró ◽  
Thomas Dittrich ◽  
Abdelhak Belaidi ◽  
Christian Mauser ◽  
...  
Keyword(s):  
Charge Separation ◽  
Surface Photovoltage ◽  
Cdse Nanocrystals ◽  
Type Ii ◽  
Multilayered Structures ◽  
Surface Photovoltage Spectroscopy

Surface Photovoltage Spectroscopy Resolves Interfacial Charge Separation Efficiencies in ZnO Dye-Sensitized Solar Cells

2018 ◽  
Vol 122 (5) ◽  
pp. 2582-2588 ◽  
Author(s):  
Manuel Rodríguez-Pérez ◽  
Esdras J. Canto-Aguilar ◽  
Rodrigo García-Rodríguez ◽  
Alexandra T. De Denko ◽  
Gerko Oskam ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Separation ◽  
Dye Sensitized Solar Cells ◽  
Surface Photovoltage ◽  
Surface Photovoltage Spectroscopy ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Interfacial Charge

scholarly journals Photochemical Charge Separation in Poly(3-hexylthiophene) (P3HT) Films Observed with Surface Photovoltage Spectroscopy

2013 ◽  
Vol 117 (51) ◽  
pp. 26905-26913 ◽  
Author(s):  
Frank E. Osterloh ◽  
Michael A. Holmes ◽  
Lilian Chang ◽  
Adam J. Moulé ◽  
Jing Zhao
Keyword(s):  
Charge Separation ◽  
Surface Photovoltage ◽  
Surface Photovoltage Spectroscopy

Investigation of charge separation in particulate oxysulfide and oxynitride photoelectrodes by surface photovoltage spectroscopy

2017 ◽  
Vol 683 ◽  
pp. 140-144 ◽  
Author(s):  
Masanori Kodera ◽  
Jiarui Wang ◽  
Benjamin A. Nail ◽  
Jingyuan Liu ◽  
Haruki Urabe ◽  
...  
Keyword(s):  
Charge Separation ◽  
Surface Photovoltage ◽  
Surface Photovoltage Spectroscopy

Investigation of P3HT/n-Si heterojunction using surface photovoltage spectroscopy

Vacuum ◽  
2012 ◽  
Vol 86 (12) ◽  
pp. 2158-2161 ◽  
Author(s):  
Yongchang Sang ◽  
Aimin Liu ◽  
Weifeng Liu ◽  
Dawei Kang
Keyword(s):  
Surface Photovoltage ◽  
Surface Photovoltage Spectroscopy

Sustainable one-pot synthesis of strontium phosphate nanoparticles with effective charge carriers for photocatalytic degradation of carcinogenic naphthylamine derivative

2021 ◽  
Author(s):  
Balamurugan Arumugam ◽  
Balamurugan Muthukutty ◽  
Shen-Ming Chen ◽  
Baishnisha Amanulla ◽  
Sayee Kannan Ramaraj
Keyword(s):  
Photocatalytic Degradation ◽  
Charge Separation ◽  
Effective Charge ◽  
Congo Red ◽  
Charge Carriers ◽  
Precipitation Method ◽  
One Pot ◽  
One Pot Synthesis ◽  
Strontium Phosphate

Sustainable one-pot precipitation method was applied for synthesizing strontium phosphate nanoparticles (SrPO NPs) and utilized as effective charge separation photocatalyst for degradation of oncogenic napthylamine derivative (Congo red). Significant photocatalytic...

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