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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Heterojunction semiconductors: A strategy to develop efficient photocatalytic materials for visible light water splitting

Cited 49 times inthomson ciCited 47 times inthomson ci
Title
Heterojunction semiconductors: A strategy to develop efficient photocatalytic materials for visible light water splitting
Other Titles
Heterojunction semiconductors: A strategy to develop efficient photocatalytic materials for visible light water splitting
Author
Jang, Jum SukKim, Hyun GyuLee, Jae Sung
Keywords
Heterojunction; Photocatalysts; Water splitting; Recombination
Issue Date
2012-05
Publisher
ELSEVIER SCIENCE BV
Citation
CATALYSIS TODAY, v.185, no.1, pp.270 - 277
Abstract
Heterojunction semiconductors are discussed as a strategy to develop efficient visible light photocatalysts for water splitting. The concept has been demonstrated in photovoltaic cells and optoelectronic devices, for which junction-type semiconductors show greatly enhanced efficiency compared to the devices consisting of a single semiconductor. We applied this proven concept to fabricate photocatalysts of inorganic semiconductors. Thus heterojunction structures of Shottky junctions, p-n junctions (or p-n diode), p-n junctions with Ohmic layer, and bulk heterojunctions were fabricated and their photoactivity was tested for reduction or oxidation of water under visible light. The formation of heterojunctions results in the efficient separation of electron-hole pairs to minimize the energy-wasteful electron-hole recombination, which leads to the high photocatalytic activity. As the complexity and sophistication of the photocatalyst fabrication increased, the photoactivity also increased. Modern nanomaterial synthetic techniques were employed to bring into reality the highly engineered material configurations. (C) 2011 Elsevier B. V. All rights reserved
URI
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DOI
10.1016/j.cattod.2011.07.008
ISSN
0920-5861
Appears in Collections:
ECHE_Journal Papers
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