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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S1 — Jan. 13, 2014
  • pp: A21–A27

Photoelectrochemical activity on Ga-polar and N-polar GaN surfaces for energy conversion

Yan-Gu Lin, Yu-Kuei Hsu, Antonio M. Basilio, Yit-Tsong Chen, Kuei-Hsien Chen, and Li-Chyong Chen  »View Author Affiliations

Optics Express, Vol. 22, Issue S1, pp. A21-A27 (2014)

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Hydrogen generation through direct photoelectrolysis of water was studied using photoelectrochemical cells made of different facets of free-standing polar GaN system. To build the fundamental understanding at the differences of surface photochemistry afforded by the GaN { 0001 } and { 000 1 } polar surfaces, we correlated the relationship between the surface structure and photoelectrochemical performance on the different polar facets. The photoelectrochemical measurements clearly revealed that the Ga-polar surface had a more negative onset potential relative to the N-polar surface due to the much negative flat-band potential. At more positive applied voltages, however, the N-polar surface yielded much higher photocurrent with conversion efficiency of 0.61% compared to that of 0.55% by using the Ga-polar surface. The reason could be attributed to the variation in the band structure of the different polar facets via Mott-Schottky analyses. Based on this work, understanding the facet effect on photoelectrochemical activity can provide a blueprint for the design of materials in solar hydrogen applications.

© 2013 Optical Society of America

OCIS Codes
(160.6000) Materials : Semiconductor materials
(260.5130) Physical optics : Photochemistry
(350.6050) Other areas of optics : Solar energy

ToC Category:
Solar Fuel

Original Manuscript: May 8, 2013
Revised Manuscript: September 14, 2013
Manuscript Accepted: October 10, 2013
Published: November 12, 2013

Yan-Gu Lin, Yu-Kuei Hsu, Antonio M. Basilio, Yit-Tsong Chen, Kuei-Hsien Chen, and Li-Chyong Chen, "Photoelectrochemical activity on Ga-polar and N-polar GaN surfaces for energy conversion," Opt. Express 22, A21-A27 (2014)

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  1. Y. G. Lin, Y. K. Hsu, Y. C. Chen, L. C. Chen, S. Y. Chen, and K. H. Chen, “Visible-light-driven photocatalytic carbon-doped porous ZnO nanoarchitectures for solar water-splitting,” Nanoscale 4(20), 6515–6519 (2012). [CrossRef] [PubMed]
  2. Y. G. Lin, Y. K. Hsu, Y. C. Chen, S. B. Wang, J. T. Miller, L. C. Chen, and K. H. Chen, “Plasmonic Ag@Ag3(PO4)1−x nanoparticle photosensitized ZnO nanorod-array photoanodes for water oxidation,” Energy Environ. Sci. 5(10), 8917–8922 (2012). [CrossRef]
  3. H. Kato, K. Asakura, and A. Kudo, “Highly efficient water splitting into H2 and O2 over Lanthanum-doped NaTaO3 photocatalysts with high crystallinity and surface nanostructure,” J. Am. Chem. Soc. 125(10), 3082–3089 (2003). [CrossRef] [PubMed]
  4. K. Domen, J. N. Kondo, M. Hara, and T. Takata, “Photo- and mechano-catalytic overall water splitting reactions to form hydrogen and oxygen on heterogeneous catalysts,” Bull. Chem. Soc. Jpn. 73(6), 1307–1331 (2000). [CrossRef]
  5. H. Kadowaki, J. Sato, H. Kobayashi, N. Saito, H. Nishiyama, Y. Simodaira, and Y. Inoue, “Photocatalytic activity of the RuO2-dispersed composite p-block metal oxide LiInGeO4 with d10-d10 configuration for water decomposition,” J. Phys. Chem. B 109(48), 22995–23000 (2005). [CrossRef] [PubMed]
  6. K. Maeda, K. Teramura, D. Lu, T. Takata, N. Saito, Y. Inoue, and K. Domen, “Photocatalyst releasing hydrogen from water,” Nature 440(7082), 295 (2006). [CrossRef] [PubMed]
  7. D. Wang, A. Pierre, M. G. Kibria, K. Cui, X. Han, K. H. Bevan, H. Guo, S. Paradis, A. R. Hakima, and Z. Mi, “Wafer-level photocatalytic water splitting on GaN nanowire arrays grown by molecular beam epitaxy,” Nano Lett. 11(6), 2353–2357 (2011). [CrossRef] [PubMed]
  8. S. Y. Liu, J. K. Sheu, Y. C. Lin, S. J. Tu, F. W. Huang, M. L. Lee, and W. C. Lai, “Mn-doped GaN as photoelectrodes for the photoelectrolysis of water under visible light,” Opt. Express 20(S5Suppl 5), A678–A683 (2012). [CrossRef] [PubMed]
  9. H. S. Jung, Y. J. Hong, Y. Li, J. Cho, Y. J. Kim, and G. C. Yi, “Photocatalysis using GaN nanowires,” ACS Nano 2(4), 637–642 (2008). [CrossRef] [PubMed]
  10. D. Zhuang and J. H. Edgar, “Wet etching of GaN, AlN, and SiC: a review,” Mater. Sci. Eng. Rep. 48(1), 1–46 (2005). [CrossRef]
  11. J. D. Beach, R. T. Collins, and J. A. Turner, “Band-edge potentials of n-type and p-type GaN,” J. Electrochem. Soc. 150(7), A899–A904 (2003). [CrossRef]
  12. X. Shen, Y. A. Small, J. Wang, P. B. Allen, M. V. Fernandez-Serra, M. S. Hybertsen, and J. T. Muckerman, “Photocatalytic water oxidation at the GaN (101̅0)−water interface,” J. Phys. Chem. C 114(32), 13695–13704 (2010). [CrossRef]
  13. Y. K. Hsu, Y. G. Lin, and Y. C. Chen, “Polarity-dependent photoelectrochemical activity in ZnO nanostructures for solar water splitting,” Electrochem. Commun. 13(12), 1383–1386 (2011). [CrossRef]
  14. K. Fujii, Y. Iwaki, H. Masui, T. J. Baker, M. Iza, H. Sato, J. Kaeding, T. Yao, J. S. Speck, S. P. Denbaars, S. Nakamura, and K. Ohkawa, “Photoelectrochemical Properties of Nonpolar and Semipolar GaN,” Jpn. J. Appl. Phys. 46(10A), 6573–6578 (2007). [CrossRef]
  15. M. Stutzmann, O. Ambache, M. Eickhoff, U. Karrer, A. L. Pimenta, R. Neuberger, J. Schalwig, R. Dimitrov, P. J. Schuck, and R. D. Grober, “Playing with polarity,” Phys. Status Solidi 228(2), 505–512 (2001). [CrossRef]
  16. D. K. Zhong, J. W. Sun, H. Inumaru, and D. R. Gamelin, “Solar water oxidation by composite catalyst/α-Fe2O3 photoanodes,” J. Am. Chem. Soc. 131(17), 6086–6087 (2009). [CrossRef] [PubMed]
  17. M. Ono, K. Fujii, T. Ito, Y. Iwaki, A. Hirako, T. Yao, and K. Ohkawa, “Photoelectrochemical reaction and H2 generation at zero bias optimized by carrier concentration of n-type GaN,” J. Chem. Phys. 126(5), 054708 (2007). [CrossRef] [PubMed]
  18. I. M. Huygens, A. Theuwis, W. P. Gomes, and K. Strubbe, “Photoelectrochemical reactions at the n-GaN electrode in 1 M H2SO4 and in acidic solutions containing Cl− ions,” Phys. Chem. Chem. Phys. 4(11), 2301–2306 (2002). [CrossRef]
  19. B. J. Rodriquez, W. C. Yang, R. J. Nemanich, and A. Gruverman, “Scanning probe investigation of surface charge and surface potential of GaN-based heterostructures,” Appl. Phys. Lett. 86(11), 112115 (2005). [CrossRef]
  20. R. Calarco, M. Marso, T. Richter, A. I. Aykanat, R. Meijers, A. V D Hart, T. Stoica, and H. Lüth, “Size-dependent Photoconductivity in MBE-Grown GaN-Nanowires,” Nano Lett. 5(5), 981–984 (2005). [CrossRef] [PubMed]

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