Photoelectrochemical hydrogen generation with linear gradient Al composition dodecagon faceted AlGaN/n-GaN electrode

W. C. Lai, M. H. Ma, B. K. Lin, B. H. Hsieh, Y. R. Wu, J. K. Sheu

研究成果: Article

3 引文 (Scopus)

摘要

We demonstrated photoelectrochemical cells (PECs) with dodecagon faceted AlGaN/n-GaN heterostructure electrode for H2 generation, where the AlGaN/n-GaN heterostructure has a linear gradient Al composition (LGAC). The separation efficiency of the photo-generated electron-hole pairs in the electrode performs a key function in the H2 generation efficiency of PEC cells. The linear gradient Al composition, AlGaN, could create more internal field and light absorption because of the linear graded band gap. Therefore, the zero-bias photocurrent density of PEC cells with dodecagon facet LGAC AlGaN/n-GaN heterostructure electrode is around 5.9 times larger than that of dodecagon faceted n-GaN electrode.

原文English
頁(從 - 到)A1853-A1861
期刊Optics Express
22
發行號25
DOIs
出版狀態Published - 2014 十二月 15

指紋

gradients
electrodes
hydrogen
cells
electromagnetic absorption
photocurrents
flat surfaces

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

引用此文

Lai, W. C. ; Ma, M. H. ; Lin, B. K. ; Hsieh, B. H. ; Wu, Y. R. ; Sheu, J. K. / Photoelectrochemical hydrogen generation with linear gradient Al composition dodecagon faceted AlGaN/n-GaN electrode. 於: Optics Express. 2014 ; 卷 22, 編號 25. 頁 A1853-A1861.
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abstract = "We demonstrated photoelectrochemical cells (PECs) with dodecagon faceted AlGaN/n-GaN heterostructure electrode for H2 generation, where the AlGaN/n-GaN heterostructure has a linear gradient Al composition (LGAC). The separation efficiency of the photo-generated electron-hole pairs in the electrode performs a key function in the H2 generation efficiency of PEC cells. The linear gradient Al composition, AlGaN, could create more internal field and light absorption because of the linear graded band gap. Therefore, the zero-bias photocurrent density of PEC cells with dodecagon facet LGAC AlGaN/n-GaN heterostructure electrode is around 5.9 times larger than that of dodecagon faceted n-GaN electrode.",
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Photoelectrochemical hydrogen generation with linear gradient Al composition dodecagon faceted AlGaN/n-GaN electrode. / Lai, W. C.; Ma, M. H.; Lin, B. K.; Hsieh, B. H.; Wu, Y. R.; Sheu, J. K.

於: Optics Express, 卷 22, 編號 25, 15.12.2014, p. A1853-A1861.

研究成果: Article

TY - JOUR

T1 - Photoelectrochemical hydrogen generation with linear gradient Al composition dodecagon faceted AlGaN/n-GaN electrode

AU - Lai, W. C.

AU - Ma, M. H.

AU - Lin, B. K.

AU - Hsieh, B. H.

AU - Wu, Y. R.

AU - Sheu, J. K.

PY - 2014/12/15

Y1 - 2014/12/15

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AB - We demonstrated photoelectrochemical cells (PECs) with dodecagon faceted AlGaN/n-GaN heterostructure electrode for H2 generation, where the AlGaN/n-GaN heterostructure has a linear gradient Al composition (LGAC). The separation efficiency of the photo-generated electron-hole pairs in the electrode performs a key function in the H2 generation efficiency of PEC cells. The linear gradient Al composition, AlGaN, could create more internal field and light absorption because of the linear graded band gap. Therefore, the zero-bias photocurrent density of PEC cells with dodecagon facet LGAC AlGaN/n-GaN heterostructure electrode is around 5.9 times larger than that of dodecagon faceted n-GaN electrode.

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