Interpreting interfacial semiconductor–liquid capacitive characteristics impacted by surface states: a theoretical and experimental study of CuGaS2

2020 ◽  
Vol 22 (35) ◽  
pp. 19631-19642
Author(s):  
Botong Miao ◽  
Kassoum Sangaré ◽  
Asif Iqbal ◽  
Benoît Marsan ◽  
Kirk H. Bevan
Keyword(s):  
Experimental Study ◽  
Doping Concentration ◽  
Surface States ◽  
Flat Band ◽  
Flat Band Potential ◽  
First Order

A first-order approach is presented to estimate the doping concentration and flat band potential of a semiconductor photoanode subject to surface states.

Influence of Surface States on the Evaluation of the Flat Band Potential of TiO2

2014 ◽  
Vol 6 (4) ◽  
pp. 2401-2406 ◽  
Author(s):  
Hao Ge ◽  
Hui Tian ◽  
Yangen Zhou ◽  
Shuyao Wu ◽  
Daliang Liu ◽  
...  
Keyword(s):  
Surface States ◽  
Flat Band ◽  
Flat Band Potential

Flat band potential of as-grown n-MoSe2 single crystal electrodes

1988 ◽  
Vol 110 (1) ◽  
pp. 293-299 ◽  
Author(s):  
R. Srivastava ◽  
V. M. Pathak ◽  
V. V. Rao
Keyword(s):  
Single Crystal ◽  
Flat Band ◽  
Flat Band Potential

Fermi level pinning or semiconductor electrodes in aqueous and non aqueous electrolytes: influence of the modification of the electrode surface

1989 ◽  
Vol 67 (3) ◽  
pp. 382-388 ◽  
Author(s):  
O. Savadogo
Keyword(s):  
Fermi Level ◽  
Acidic Medium ◽  
Open Circuit ◽  
Flat Band ◽  
Flat Band Potential ◽  
Fermi Level Pinning ◽  
Material Surfaces ◽  
Electrolyte Interface ◽  
Semiconductor Electrodes ◽  
Minority Carriers

Modification of several semiconductors material surfaces with H4SiW12O40•nH2O have been carried out to produce an increase in the open circuit photopotential at the semiconductor/electrolyte interface (Voc) without changing the flat-band potential. The augmentation of Voc is shown to be attributed to a decrease of the minority carriers recombination at the semiconductor/electrolyte interface along with the suppression of Fermi level pinning. The enhancement of Voc and the electrocatalytic activity of the hydrogen evolution reaction in acidic medium of the derivatized electrodes is attributed to the Fermi level unpinning. Keywords: photoelectrodes, photoelectrocatalysis, pinning, modification improvement.

FeCoW multimetal oxide-coated W:BiVO4 photoanode for efficient oxygen evolution

2018 ◽  
Vol 2 (9) ◽  
pp. 2053-2059 ◽  
Author(s):  
Xiaorong Liang ◽  
Jiale Xie ◽  
Jinyun Xiong ◽  
Liangping Gong ◽  
Chang Ming Li
Keyword(s):  
Oxygen Evolution ◽  
Flat Band ◽  
Flat Band Potential ◽  
Negative Shift

A FeCoW multimetal oxide-coated W:BiVO4 photoanode performs a 3.8 times photocurrent and a negative shift of the flat-band potential by 280 mV in comparison to a W:BiVO4 photoanode.

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