Mn-doped GaN as photoelectrodes for the photoelectrolysis of water under visible light

Shu Yen Liu, J. K. Sheu, Yu Chuan Lin, S. J. Tu, F. W. Huang, M. L. Lee, W. C. Lai

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

Hydrogen generation through direct photoelectrolysis of water was studied using photoelectrochemical (PEC) cells made of Mn-doped GaN photoelectrodes. In addition to its absorption of the ultraviolet spectrum, Mn-doped GaN photoelectrodes could absorb photons in the visible spectrum. The photocurrents measured from PEC cells made of Mndoped GaN were at least one order higher than those measured from PEC cells made of undoped GaN-working electrodes. Under the visible light illumination and a bias voltage below 1.2 V, the Mn-doped GaN photoelectrodes could drive the water splitting reaction for hydrogen generation. However, hydrogen generation could not be achieved under the same condition wherein undoped GaN photoelectrodes were used. According to the results of the spectral responses and transmission spectra obtained from the experimental photoelectrodes, the enhanced photocurrent in the Mn-doped GaN photoelectrodes, compared with the undoped GaN photoelectrodes, was attributable to the Mn-related intermediate band within the band gap of GaN that resulted in further photon absorption.

原文English
頁(從 - 到)A678-A683
期刊Optics Express
20
發行號19
出版狀態Published - 2012 九月 10

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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