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Effect of laser irradiation on characteristics of porous silicon photodetector
مقدم أطروحة جامعية
مشرف أطروحة جامعية
الجامعة
الجامعة التكنولوجية
الكلية
-
القسم الأكاديمي
قسم العلوم التطبيقية
دولة الجامعة
العراق
الدرجة العلمية
ماجستير
تاريخ الدرجة العلمية
2012
الملخص الإنجليزي
In this project, a double junction Al/PSi/Si/Al is presented.
The Porous silicon (PSi) layer was prepared by electrochemical etching using different etching current densities.
The effect of Nd-Yag laser irradiation on the Morphological, structural, electrical and optoelectrical properties of Al/PSi/Si/Al photodetector are demonstrated.
The morphological investigation, carried out using AFM, showed that the root mean square roughness is increased after laser irradiation.
XRD results revealed that the laser irradiation leads to a change in the preferred orientation to (100) plane and the FWHM increased with increasing the laser fluence.
I-V characteristics confirmed that laser irradiation of porous Si improves the junction characteristics, the ideality factor and the rectification ratio results support this improvement.
The best junction characteristics (ideality factor, rectification ratio) were obtained for photodetector made using (10mA/cm2) current density and irradiation fluence of (60mJ/cm2).
The spectral responsivity of photodetectors is increased after laser irradiation.
Maximum responsivity of (0.5A/W) at λ=825nm was obtained for photodetectors prepared using 20mA/cm2 and treated with laser fluence of (40mJ/cm2).
No shift in peak responsivity was observed after laser irradiation.
The figures of merit of the fabricated photodetectors are calculated before and after laser irradiation.
Photodetector prepared using 20mA/cm2 etching current density and laser irradiated fluence of (40mJ/cm2) gave a detectivity (D) of (4.3*1010w-1cm HZ1/2) at λ=825nm.
Minority carrier lifetime measured showed strong dependence on etching current density and laser fluence.
التخصصات الرئيسية
الموضوعات
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Abbud, Marwah Qasim. (2012). Effect of laser irradiation on characteristics of porous silicon photodetector. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-419748
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Abbud, Marwah Qasim. Effect of laser irradiation on characteristics of porous silicon photodetector. (Master's theses Theses and Dissertations Master). University of Technology. (2012).
https://search.emarefa.net/detail/BIM-419748
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Abbud, Marwah Qasim. (2012). Effect of laser irradiation on characteristics of porous silicon photodetector. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-419748
لغة النص
الإنجليزية
نوع البيانات
رسائل جامعية
رقم السجل
BIM-419748
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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