Search In this Thesis
   Search In this Thesis  
العنوان
Preparation of Graphene and its derivatives for applications in Solar Cells \
المؤلف
Khedr, Ghada Emam Ahmed.
هيئة الاعداد
باحث / غادة امام احمد خضر
مشرف / سيد ثابت عبد الرحيم
مشرف / احمد محمد الصباغ
مشرف / محمد حسن طلعت
تاريخ النشر
2018.
عدد الصفحات
180 p. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الكيمياء
تاريخ الإجازة
1/1/2018
مكان الإجازة
جامعة عين شمس - كلية العلوم - الكيمياء
الفهرس
Only 14 pages are availabe for public view

from 180

from 180

Abstract

The aim of the current research is to advance the performance and lower the cost of manufacturing dye sensitized solar cells through the replacement of the different solar cell components: mainly the active layer by incorporation of graphene and different ratios of different metal oxides nanofibers.
This thesis consists of three main chapters as follows:
 Chapter One: contains a general introduction on the subject and a literature review.
 Chapter Two: Include materials, instruments, preparations and general procedures, methods of data analysis.
 Chapter three: This chapter represents the materials’ characterizations and the results of the study:
1. Different thickness of TiO2 layers were first optimized giving highest conversion efficiency for three layers.
2. Layers of GR/TiO2 composites with various GR’s ratios between (0 and 40 wt. %) have been fabricated, 30 wt. % GR-TiO2 gives the highest photovoltaic efficiency 0.39 %.
3. The electrode made of 1 wt. % GR-TiO2 -5wt. % TiO2 NF gives the highest photovoltaic efficiency 0.24 %.
4. The electrode made of 1 wt. % GR-TiO2 -5 wt. % ZrO2 NF gives the highest photovoltaic efficiency 0. 19 %.
5. The electrode made of 1 wt. % GR-TiO2 -7 wt. % SnO2 NF gives the highest photovoltaic efficiency 0.13 %.
6. Titania nanofibers are more effective in increasing the power conversion efficiency than zirconia nanofibers and tin oxide nanofibers. TiO2 NF > ZrO2 NF > SnO2 NF
7. The electrode made of 1 wt. % GR and TiO2 gives the highest photovoltaic efficiency 0.54 %.
8. The use of N3 dye instead of the expensive N719 as well as the carbon counter electrode instead of Pt will lower the cost of fabrication of the DSSCs.