کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
729463 1461428 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Roles of cesium and oxides in the processing of gallium aluminum arsenide photocathodes
ترجمه فارسی عنوان
نقش سزیم و اکسید در پردازش فوتوکاتودهای آلومینیوم آرسنید گالیم
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی

The roles of cesium (Cs) and oxides in the processing of gallium aluminum arsenide (GaAlAs) photocathodes have been investigated. The Cs/O activation, Cs/O reactivation and degradation experiments are performed on GaAlAs photocathode. The activated photocurrent, degraded photocurrent and quantum efficiency curves are measured using a self-developed multi-information measurement system. We use the quantum efficiency formula to fit the experimental quantum efficiency curves, and obtain the performance parameters of the photocathode. The results show that the oxide gases play an important role in the degradation of the photocathode, and the Cs atoms could react with the oxides on the degraded surface and the residual oxide gases. Besides, the quantum efficiency of the degraded GaAlAs photocathode could be restored to a good level after Cs/O reactivation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science in Semiconductor Processing - Volume 18, February 2014, Pages 122–127
نویسندگان
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