Photoelectrochemical Characterization of p-type InAlP on GaAs for Solar Water Splitting Application

Title
Photoelectrochemical Characterization of p-type InAlP on GaAs for Solar Water Splitting Application
Authors
송진동박석인Mostafa Afifi HassanJin-Ho KangSantosh S. PatilMuhammad Ali JoharSang-Wan Ryu
Keywords
InAlP; Photocathode; Photoelectrochemical; Water splitting
Issue Date
2019-01
Publisher
Journal of the Korean Physical Society
Citation
VOL 74, NO 2-121
Abstract
The photoelectrochemical characteristics of p-InAlP grown on GaAs were investigated to exploit the potential of that material future as a photocathode in solar water splitting. The flat band potential was measured, and electrochemical impedance spectroscopy was performed to propose an equivalent circuit model and circuit elements fitted for charge transport analysis. Low photocatalytic activity was attributed to the band alignment with the water redox level. Since the valence band of InAlP is close to the water oxidation level, it causes inefficient hole transport to the counter electrode and the accumulation of holes in the photocathode.
URI
http://pubs.kist.re.kr/handle/201004/70045
ISSN
0374-4884
Appears in Collections:
KIST Publication > Article
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