Wavelength dependent photochemical charge transfer at the Cu2O–BiVO4 particle interface – evidence for tandem excitation

2018 ◽  
Vol 54 (65) ◽  
pp. 9023-9026 ◽  
Author(s):  
Zongkai Wu ◽  
Ghunbong Cheung ◽  
Jiarui Wang ◽  
Zeqiong Zhao ◽  
Frank E. Osterloh
Keyword(s):  
Charge Transfer ◽  
Surface Photovoltage ◽  
Surface Photovoltage Spectroscopy ◽  
First Time

Surface photovoltage spectroscopy resolves wavelength-dependent photochemical charge transfer between irregularly shaped BiVO4 and Cu2O particles for the first time.

Charge Transfer in c-Si(n++)/TiO2(ALD) at the Amorphous/Anatase Transition: A Transient Surface Photovoltage Spectroscopy Study

2019 ◽  
Vol 12 (2) ◽  
pp. 3140-3149 ◽  
Author(s):  
Steffen Fengler ◽  
Herman Kriegel ◽  
Mauricio Schieda ◽  
Henning Gutzmann ◽  
Thomas Klassen ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Surface Photovoltage ◽  
Spectroscopy Study ◽  
Surface Photovoltage Spectroscopy

scholarly journals Photochemical charge transfer observed in nanoscale hydrogen evolving photocatalysts using surface photovoltage spectroscopy

2015 ◽  
Vol 8 (10) ◽  
pp. 2970-2976 ◽  
Author(s):  
J. Wang ◽  
J. Zhao ◽  
F. E. Osterloh
Keyword(s):  
Charge Transfer ◽  
Space Charge ◽  
Water Splitting ◽  
Surface Photovoltage ◽  
Solar Water ◽  
Surface Photovoltage Spectroscopy ◽  
Solar Water Splitting ◽  
Inorganic Nanostructures ◽  
Carrier Separation

The application of inorganic nanostructures for solar water splitting is currently limited by our understanding of photochemical charge transfer on the nanoscale, where space charge layers are less effective for carrier separation.

The Fluorescent and Photovoltaic Properties of Meso-Teraphenyl Porphyrins with Different Substituents

2011 ◽  
Vol 415-417 ◽  
pp. 1387-1390
Author(s):  
Wei Yin ◽  
Huan Bao Fa ◽  
Chang Guo Chen ◽  
Li Ping Zhang
Keyword(s):  
Charge Transfer ◽  
Fluorescence Intensity ◽  
Surface Photovoltage ◽  
Charge Transfer Process ◽  
Photovoltaic Properties ◽  
Fluorescent Intensity ◽  
Surface Photovoltage Spectroscopy ◽  
Spectral Bands ◽  
P Type ◽  
Derivatives Of

The fluorescent and photovoltaic properties of derivatives of selected substituted meso-phenylporphyrins were studied. It was found that the fluorescent intensity could be enhanced by the electron-donating substituent but weakened by the electron-withdrawing subsituent. The photovoltaic properties and charge transfer process of the compounds were investigated by surface photovoltage spectroscopy (SPS) techniques, which revealed that all the compounds are p-type semiconductors. The spectral bands of all porphyrins could be ascribed to π→π* transitions. Comparing with the fluorescent spectral showed that the stronger the fluorescence intensity of porphyrin was, the weaker the surface photovoltage intensity of it was.

Use of surface photovoltage spectroscopy to probe energy levels and charge carrier dynamics in transition metal (Ni, Cu, Fe, Mn, Rh) doped SrTiO3 photocatalysts for H2 evolution from water

2018 ◽  
Vol 6 (14) ◽  
pp. 5774-5781 ◽  
Author(s):  
Xiaoqing Ma ◽  
Xiaoli Cui ◽  
Zeqiong Zhao ◽  
Mauricio A. Melo ◽  
Emily J. Roberts ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Carrier ◽  
Energy Levels ◽  
Carrier Dynamics ◽  
Surface Photovoltage ◽  
H2 Evolution ◽  
Surface Photovoltage Spectroscopy ◽  
Charge Carrier Dynamics ◽  
Donor States ◽  
Charge Transfer Dynamics

The photovoltage onset reveals the energetics of the donor states, while photovoltage size and reversibility provide information on the charge transfer dynamics of the dopants and their ability to oxidize methanol.

scholarly journals P3HT:PCBM Bulk-Heterojunctions: Observing Interfacial and Charge Transfer States with Surface Photovoltage Spectroscopy

2014 ◽  
Vol 118 (27) ◽  
pp. 14723-14731 ◽  
Author(s):  
Frank E. Osterloh ◽  
Michael A. Holmes ◽  
Jing Zhao ◽  
Lilian Chang ◽  
Steven Kawula ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Surface Photovoltage ◽  
Bulk Heterojunctions ◽  
Surface Photovoltage Spectroscopy

Direct imaging of charge transfer

1996 ◽  
Vol 54 ◽  
pp. 680-681
Author(s):  
Yimei Zhu ◽  
J. Tafto
Keyword(s):  
Charge Transfer ◽  
Electron Diffraction ◽  
Scattering Amplitude ◽  
High Temperature Superconductors ◽  
Charge Carriers ◽  
Image Charge ◽  
Net Charge ◽  
Long Time ◽  
Electron Holes ◽  
First Time

The electron holes confined to the CuO2-plane are the charge carriers in high-temperature superconductors, and thus, the distribution of charge plays a key role in determining their superconducting properties. While it has been known for a long time that in principle, electron diffraction at low angles is very sensitive to charge transfer, we, for the first time, show that under a proper TEM imaging condition, it is possible to directly image charge in crystals with a large unit cell. We apply this new way of studying charge distribution to the technologically important Bi2Sr2Ca1Cu2O8+δ superconductors.Charged particles interact with the electrostatic potential, and thus, for small scattering angles, the incident particle sees a nuclei that is screened by the electron cloud. Hence, the scattering amplitude mainly is determined by the net charge of the ion. Comparing with the high Z neutral Bi atom, we note that the scattering amplitude of the hole or an electron is larger at small scattering angles. This is in stark contrast to the displacements which contribute negligibly to the electron diffraction pattern at small angles because of the short g-vectors.

scholarly journals An In-Situ Reaction Route to Molecular Level Dispersed Bisimide and ZnO Nanorod Hybrids with Efficient Photo-Induced Charge Transfer

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Chunzheng Lv ◽  
Lirong He ◽  
Jiahong Tang ◽  
Feng Yang ◽  
Chuhong Zhang
Keyword(s):  
Charge Transfer ◽  
Electric Field ◽  
Self Assembly ◽  
Molecular Level ◽  
Surface Photovoltage ◽  
Zno Nanorod ◽  
In Situ Reaction ◽  
Perylene Bisimide ◽  
Induced Charge

AbstractAs an important photoconductive hybrid material, perylene/ZnO has attracted tremendous attention for photovoltaic-related applications, but generally faces a great challenge to design molecular level dispersed perylenes/ZnO nanohybrids due to easy phase separation between perylenes and ZnO nanocrystals. In this work, we reported an in-situ reaction method to prepare molecular level dispersed H-aggregates of perylene bisimide/ZnO nanorod hybrids. Surface photovoltage and electric field-induced surface photovoltage spectrum show that the photovoltage intensities of nanorod hybrids increased dramatically for 100 times compared with that of pristine perylene bisimide. The enhancement of photovoltage intensities resulting from two aspects: (1) the photo-generated electrons transfer from perylene bisimide to ZnO nanorod due to the electric field formed on the interface of perylene bisimide/ZnO; (2) the H-aggregates of perylene bisimide in ZnO nanorod composites, which is beneficial for photo-generated charge separation and transportation. The introduction of ordered self-assembly thiol-functionalized perylene-3,4,9,10-tetracarboxylic diimide (T-PTCDI)/ ZnO nanorod composites induces a significant improvement in incident photo-to-electron conversion efficiency. This work provides a novel mentality to boost photo-induced charge transfer efficiency, which brings new inspiration for the preparation of the highly efficient solar cell.

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
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