Transcript Influence of the Deposition Process on the Band Gap and

INFLUENCE OF THE DEPOSITION PROCESS ON
THE BAND GAP AND ELECTRICAL PROPERTIES
OF TIO2 SOLAR CELLS
Dr Saad Al-Sabbagh
Ass. Prof.
Faculty of Engineering – Kufa University
Najaf - Iraq
 Why Nano Tech Solar Cells:
 1- Flexibility .
 2- Cheap Price.
 3- Easy to Manufacture .
 4- Certain Wavelength Absorption .
 Parameters Studied in this Paper :
 1- Deposition Temperature.
 2- Annealing Temperature (After Deposition )
 3- Water Concentration.
 4- Thickness.
 Main Conclusions :
1-Annealing Temperature REDUCES Band Gap Dramatically.
2-Incresing Deposition temperature REDUCES Band Gap.
3-Band Gap INCREASES Linearly with Water Concentration .
4-Thicker Samples Have a Better Short Circuit Current , but Less Open Circuit
Voltage .
5-Conversion Efficiency at Higher Degrees is BETTER , Its Peak at Nearly MidRange of Visible Region is Promising in Solar Cells Applications.
6-TiO2 Exhibits GOOD Conversion Characteristics at HIGH Temperatures
(Deposition & Annealing ) .