h.abdelhafez

حسين عبد الحافظ الزناتي

استاذ - رئيس قسم الفيزياء

كلية العلوم

العنوان: قسم الفيزياء، كلية العلوم بسوهاج

9

إعجاب
8 9 6 30 4 9 672 42
108

أضيف حديثا
  • المقررات الدراسية 8
  • ملحقات المقررات الدراسية 9
  • واجبات المقررات الدراسية 6
  • المنشورات و المؤلفات 30
  • ساعات مكتبية 4
  • الاعلانات 9
  • عدد الملفات المرفوعه 18
  • كل التنزيلات 11

المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية: optical losses

Theoretical study of ZnS/CdS bi-layer for thin-film CdTe solar cell

2018-09-02 13:10:32 الكلمات المفتاحية ITO/ZnS/CdS/CdTe solar cell, optical losses, recombination losses, short-circuit current, cell efficiency,
Theoretical study of ZnS/CdS bi-layer for thin-film CdTe solar cell
The performance of CdTe solar cells is strongly limited by the thickness of CdS window layer.A higher short-circuit current density might be achieved by decreasing the thickness of CdS layer as a result of reducing the absorption losses that take place in this layer. However, it is difficult to obtain uniform and pin-hole free CdS layers thinner than 50 nm. ... إقراء المزيد

Improvement of the performance of thin-film CdS/PbS solar cells using low-cost ZnO-based alloys as front electrode

2018-09-02 13:12:54 الكلمات المفتاحية CdS-PbS solar cell, low cost transparent electrodes, optical losses, recombination losses,
Improvement of the performance of thin-film CdS/PbS solar cells using low-cost ZnO-based alloys as front electrode
All thin film solar cells require the use of transparent conductive electrodes such as indium tin oxide (ITO) due to its unique combination of transparency, high conductivity, durability, and favourable surface properties. Indium, however, is a rare and expensive metal; proposed large-area installations of photovoltaic (PV) cells will add further strain to global indium supply. Transparent conductive materials that are ... إقراء المزيد

Quantitative assessment of electrical, optical and recombination losses in heterojunction CdS/CdTe solar cells

2018-09-02 13:14:51 الكلمات المفتاحية CdS/CdTe solar cell, optical losses, recombination losses, Electrical losses, cell efficiency,
Quantitative assessment of electrical, optical and recombination losses in heterojunction CdS/CdTe solar cells
In this paper, electrical, optical and recombination losses in thin-film solar cells passed on CdS/CdTe have been evaluated. Electrical losses due to series and shunt resistances are quantitatively estimated from J-V curves. J-V characteristics are described in terms of the Sah– Noyce–Shockley theory of generation–recombination in the space-charge region of the CdS/CdTe heterostructure. Optical losses due to multiple reflections from ... إقراء المزيد

Optimized conditions for the improvement of thin film CdS/CdTe solar cells

2018-09-02 13:21:42 الكلمات المفتاحية Cadmium sulfide, Cadmium telluride, Solar cells, optical losses, recombination losses, Solar cell efficiency,
Optimized conditions for the improvement of thin film CdS/CdTe solar cells
Efficient thin film CdS/CdTe solar cell performance requires optimum parameters of each layer of this cell and of the barrier structure.Moreover, the effect of optical losses, recombination losses at front and back surface of CdTe and recombination losses in the space-charge region (SCR) must be considered in order to really analyze the role of these parameters on the performance of ... إقراء المزيد

Influence of the optical and recombination losses on the efficiency of CdS/CdTe solar cell at ultrathin absorber layer

2018-09-02 13:36:28 الكلمات المفتاحية ultra-thin absorber layer, recombination losses, optical losses, CdS-CdTe solar cell,
Influence of the optical and recombination losses on the efficiency of CdS/CdTe solar cell at ultrathin absorber layer
Abstract: The effect of low thickness of CdTe on optical, front, and back recombination losses and hence on the efficiency of a CdS/CdTe solar cell is studied theoretically in this work. It is found that the optical losses are about 23%–24% and depend weakly on CdTe thickness. The recombination losses are about 28% at dCdTe = 0.45 m and decrease ... إقراء المزيد

Dependence of efficiency of thin-film CdS/CdTe solar cell on optical and recombination losses

2018-09-02 21:31:55 الكلمات المفتاحية CdS-CdTe solar cells, optical losses, recombination losses, short-circuit current density,
Dependence of efficiency of thin-film CdS/CdTe solar cell on optical and recombination losses
Thin-film CdS/CdTe solar cells fabricated on glass substrates have been considered as one of the most promising candidates for large-scale applications in the field of photovoltaic energy conversion. The recorded experimental efficiency of these cells is about 16%–17% and the corresponding theoretical values are more than 28%. The main causes of efficiency loss are due to optical and recombination losses. ... إقراء المزيد

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