Depletion layer controls photocatalytic hydrogen evolution with p-type gallium phosphide particles

2019 ◽  
Vol 7 (30) ◽  
pp. 18020-18029 ◽  
Author(s):  
Zeqiong Zhao ◽  
Emma J. Willard ◽  
Julius R. Dominguez ◽  
Zongkai Wu ◽  
Frank E. Osterloh
Keyword(s):  
Space Charge ◽  
Hydrogen Evolution ◽  
Gallium Phosphide ◽  
Depletion Layer ◽  
Space Charge Layer ◽  
Layer Model ◽  
Photocatalytic Hydrogen Evolution ◽  
Charge Layer ◽  
P Type ◽  
Low Activity

p-Type gallium phosphide (p-GaP) is an established photocathode material for hydrogen evolution, however, photocatalytic hydrogen evolution from p-GaP photocatalysts generally proceeds with very low activity. This can be understood on the basis of the space charge layer model presented here.

scholarly journals Charge-transfer engineering strategies for tailored ionic conductivity at oxide interfaces

2020 ◽  
Vol 8 (33) ◽  
pp. 11354-11359
Author(s):  
F. Gunkel ◽  
D. V. Christensen ◽  
N. Pryds
Keyword(s):  
Charge Transfer ◽  
Ionic Conductivity ◽  
Space Charge ◽  
Space Charge Layer ◽  
Confined Space ◽  
Ion Conduction ◽  
Oxide Interfaces ◽  
Charge Layer ◽  
Oxygen Ion ◽  
P Type

Based on the example of the p-type LaAlO3/SrTiO3 interface, we discuss charge-transfer phenomena that tailor the ionic conductivity along oxide heterointerfaces, by providing a confined space-charge layer as channel for oxygen ion conduction.

Semiconducting Behavior of Non-Solid Electrochemical State of Carbon Steel in Electrolyte Solution

2013 ◽  
Vol 785-786 ◽  
pp. 944-947
Author(s):  
Wei Dong Liu ◽  
Yi Xiao ◽  
Jian Feng Gu ◽  
Qi Jun Zhong ◽  
Li Bin Yu ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Space Charge ◽  
Sulfate Solution ◽  
Space Charge Layer ◽  
Sodium Sulfate Solution ◽  
Acid Base ◽  
Charge Layer ◽  
Capacitance Variation ◽  
P Type ◽  
Semiconducting Behavior

In this paper, the semiconducting behavior of non-solid electrochemical state of carbon steel in acid, base and salt solutions was studied by utilizing potential-capacitance and Mott-Schottky analysis. It was pointed out that the capacitance variation of space charge layer of non-solid electrochemical state of carbon steel in different solution was different. The non-solid electrochemical state showed p-type semiconducting behavior in 5 sulfuric acid and 5 % sodium sulfate solution. However, it showed n-type semiconducting behavior in 5 % sodium hydroxide, suggesting that the space charge layer of non-solid electrochemical state of the carbon steel in different electrolytes might be asymmetric.

Space charge layer effect at the platinum anode/BaZr0.9Y0.1O3−δ electrolyte interface in proton ceramic fuel cells

2020 ◽  
Vol 8 (25) ◽  
pp. 12566-12575
Author(s):  
Min Chen ◽  
Xiaobin Xie ◽  
Jinhu Guo ◽  
Dongchu Chen ◽  
Qing Xu
Keyword(s):  
Fuel Cells ◽  
Space Charge ◽  
Proton Conductor ◽  
Space Charge Layer ◽  
Layer Model ◽  
Charge Layer ◽  
Platinum Anode ◽  
Layer Effect ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

Space charge layer model at the Pt anode/BZY10 proton conductor interface.

SPACE-CHARGE LAYER, INTRINSIC "BULK" AND SURFACE COMPLEX DEFECTS IN ZnO NANOPARTICLES — A HIGH-FIELD ELECTRON PARAMAGNETIC RESONANCE ANALYSIS

2013 ◽  
Vol 06 (04) ◽  
pp. 1330004 ◽  
Author(s):  
RÜDIGER-A. EICHEL ◽  
EMRE ERDEM ◽  
PETER JAKES ◽  
ANDREW OZAROWSKI ◽  
JOHAN VAN TOL ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Space Charge ◽  
Zno Nanoparticles ◽  
High Field ◽  
Space Charge Layer ◽  
Paramagnetic Resonance ◽  
Charge Layer ◽  
Type Formula ◽  
Field Electron ◽  
Electron Paramagnetic

The defect structure of ZnO nanoparticles is characterized by means of high-field electron paramagnetic resonance (EPR) spectroscopy. Different point and complex defects could be identified, located at the "bulk" or the surface region of the nanoparticles. In particular, by exploiting the enhanced g-value resolution at a Larmor frequency of 406.4 GHz, it could be shown that the resonance commonly observed at g = 1.96 is comprised of several overlapping resonances from different defects. Based on the high-field EPR analysis, the development of a space-charge layer could be monitored that consists of (shallow) donor-type [Formula: see text] defects at the "bulk" and acceptor-type [Formula: see text] and complex [Formula: see text] defects at the surface. Application of a core-shell model allows to determine the thickness of the depletion layer to 1.0 nm for the here studied compounds [J.J. Schneider et al., Chem. Mater.22, 2203 (2010)].

ACTIVATION ENERGY FOR HOLE INJECTION AND ANALYSIS OF THE SPACE CHARGE LAYER IN ANTHRACENE CRYSTALS

1974 ◽  
Vol 3 (12) ◽  
pp. 1459-1462
Author(s):  
Masahiro Kotani ◽  
Yoko Watanabe ◽  
Tomoko Kato
Keyword(s):  
Activation Energy ◽  
Space Charge ◽  
Space Charge Layer ◽  
Hole Injection ◽  
Charge Layer

Effect of the electric field in the space-charge layer on the efficiency of short-wave photoelectric conversion in GaAs Schottky diodes

1997 ◽  
Vol 31 (10) ◽  
pp. 1053-1056 ◽  
Author(s):  
T. V. Blank ◽  
Yu. A. Gol’dberg ◽  
O. V. Konstantinov ◽  
O. I. Obolenskii ◽  
E. A. Posse
Keyword(s):  
Electric Field ◽  
Space Charge ◽  
Schottky Diodes ◽  
Short Wave ◽  
Space Charge Layer ◽  
Photoelectric Conversion ◽  
Charge Layer
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