dye sensitised solar cells
TRANSCRIPT
1
DYE-SENSITIZED SOLAR CELLS
JEFF JOSEPHS3, EEE
2
Preview
Introduction Paths to modern era Construction Working Advantage and disadvantages Comparison Conclusions
3
Introduction
□ A solar cell is a device which converts light energy to electrical energy.□ It is not ecofriendly and economic.
4
Introduction (Contd…)
□ Dss cells are made with organic dyes □ Converts light energy to electric energy□ Eco-friendly and economic
5
Invented in 1988 by Michael Grätzel and Brian O'Regan Michael Grätzel has been awarded the 2010 Millennium
Technology prize for this invention in the beginning the efficiency was up to 9% At present efficiency improved to 11% Mncs aiming to launch commercial products in future The research is going on…….
Paths to modern era
construction
6
□ Electrolyte in between anode and cathode□ Tio2 and dies□ External circuit
7
Working Schematic representation
8
working
Dye absorbs light and covert it into electrons Electrons moves to the anode through tio2 Electron passes through external circuit to cathode This electron reduces triiodide to iodide-ion in the
electrolyte Iodide-ion transfers electrons to the dye The process continuous….
9
How DSSC Works.avi
Advantages and DisadvantagesAdvantages
□ Ability to Work at Wider Angles and in Low Light
□ Long Life□ Good Price/Performance Ratio□ Low Cost □ Mechanical Robustness□ Ability to Operate at Lower
Internal Temperatures □ Lowering the electricity bills
Disadvantages□ DSSC design is the use of the
liquid electrolyte□ which has temperature
stability problems□ costly ruthenium (dye),
platinum(catalyst)□ the electrolyte solution
contains volatile organic compounds (or VOC's),
10
comparisonDSS Cells
□ Less cost□ Flexible□ A very low sunlight is
needed for the conversion □ Less efficient□ Efficiency upto 10%□ Fabrication is simple
PHOTOVOLATILE CELLS
□ More cost□ Not flexible□ Need a minimum sunlight
for the conversion□ More efficient□ Efficiency upto 25%□ Fabrication is complex
11
Conclusion□ Good for environment□ Development of this technology is essential□ Large investments leads to a solution for country’s
energy crisis□ Need of Governments direct involvement to generalise
this idea□ Large change in economy.
12
Refrences□ Google□ Wikipedia□ Science direct
13
THANK YOU
14