کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5349069 1503640 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of surface cleaning on quantum efficiency in AlGaN photocathode
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
The effect of surface cleaning on quantum efficiency in AlGaN photocathode
چکیده انگلیسی
To improve the quantum efficiency of AlGaN photocathode, various surfaces cleaning techniques for the removal of alumina and carbon from AlGaN photocathode surface were investigated. The atomic compositions of AlGaN photocathode structure and surface were measured by the X-ray photoelectron spectroscopy and Ar+ ion sputtering. It is found that the boiling KOH solution and the mixture of sulfuric acid and hydrogen peroxide, coupled with the thermal cleaning at 850 °C can effectively remove the alumina and carbon from the AlGaN photocathode surface. The quantum efficiency of AlGaN photocathode is improved to 35.1% at 240 nm, an increase of 50% over the AlGaN photocathode chemically cleaned by only the mixed solution of sulfuric acid and hydrogen peroxide and thermally cleaned at 710 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 324, 1 January 2015, Pages 590-593
نویسندگان
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