Enhancement of the Oxygen Evolution Using a 21-mu m-Thin c-Si Photoanode with a Nano-Pyramid Texture

Title
Enhancement of the Oxygen Evolution Using a 21-mu m-Thin c-Si Photoanode with a Nano-Pyramid Texture
Author
이정호
Keywords
SILICON SOLAR-CELLS; WATER; PHOTOELECTRODES; NANOPARTICLES; PHOTOCATHODES; ELECTROLYSIS; FILMS; XPS; Si nanopyramid; thin c-Si photoanode; water splitting
Issue Date
2017-12
Publisher
ELECTROCHEMICAL SOC INC
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v. 164, No. 14, Page. 1129-1132
Abstract
It is beneficial to reduce thickness of high-purity of c-Siwafer for cost-effective water splitting system based on silicon photoelectrode. However, a thin Si absorber causes insufficient absorption of light and it should be needed to solve problems. Here, a 21-mu m-thin Si photoanode for which a NiOx-coated silicon nanopyramid (SiNP) is employed is presented as a solution. The NiOx/n-SiNP structures improved the light absorption as well as the total number of catalytic sites to enable photo-oxidation reactions. A photocurrent of 7.7 mA/cm(2) was generated at the equilibrium potential of the OER (E-OER = 1.23 V vs. a reversible hydrogen electrode in a 1 M KOH solution). Also, the photoanode did not show any degradation over the 24 hr of a photoelectrochemical water-oxidation process. (c) 2017 The Electrochemical Society. All rights reserved.
URI
http://jes.ecsdl.org/content/164/14/H1129.shorthttp://repository.hanyang.ac.kr/handle/20.500.11754/72727
ISSN
0013-4651; 1945-7111
DOI
10.1149/2.1251714jes
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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