dye sensitised solar cells

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DYE-SENSITIZED SOLAR CELLS

JEFF JOSEPHS3, EEE

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Preview

Introduction Paths to modern era Construction Working Advantage and disadvantages Comparison Conclusions

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Introduction

□ A solar cell is a device which converts light energy to electrical energy.□ It is not ecofriendly and economic.

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Introduction (Contd…)

□ Dss cells are made with organic dyes □ Converts light energy to electric energy□ Eco-friendly and economic

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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

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□ Electrolyte in between anode and cathode□ Tio2 and dies□ External circuit

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Working Schematic representation

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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….

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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),

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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

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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.

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Refrences□ Google□ Wikipedia□ Science direct

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THANK YOU

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