کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
180304 459377 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Au nanoparticle modified GaN photoelectrode for photoelectrochemical hydrogen generation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Au nanoparticle modified GaN photoelectrode for photoelectrochemical hydrogen generation
چکیده انگلیسی

Systematic investigations of photoelectrochemical behavior between Au nano-particle modified n- and p-GaN were reported in this study. With Au nanoparticles sputtered on the surface, strong Fermi level pinning caused by the creation of metal induced gap states alters the behavior of electrolyte/GaN interface. Under illumination, the photocurrent of p-GaN at zero bias exhibited 25 times enhancement, whereas that of n-GaN showed slight decrease. The overall hydrogen generation efficiency of p-GaN in HCl solution was increased from 0.02% to around 0.59%. The enhancement can be attributed to the different energy shift of the surface band edge at the interface according to the doping of GaN.

Research Highlights
► We compare the photoelectrochemical results of Au nano-particle modified n and p-GaN.
► Strong Fermi level pinning alters the behavior of electrolyte/GaN interface.
► Photocurrent of p-GaN at zero bias exhibited 25 times enhancement.
► The hydrogen generation efficiency of p-GaN in HCl was increased from 0.02% to 0.59%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 13, Issue 6, June 2011, Pages 530–533
نویسندگان
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