The document discusses dye-sensitized solar cells (DSSCs), which convert light energy to electrical energy using organic dyes and offer ecological and economic benefits. Invented in 1988, their efficiency has improved from 9% to 11%, and they have advantages such as low cost and performance in low light, but also face challenges like the instability of liquid electrolytes. The conclusion emphasizes the necessity of developing this technology to address energy crises and suggests government involvement to promote widespread adoption.

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DYE-SENSITIZEDSOLARCELLS
JEFF JOSEPH
S3, 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

6. 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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10. Advantages and Disadvantages
Advantages
□ 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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11. comparison
DSS 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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12. 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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13. Refrences
□ Google
□ Wikipedia
□ Science direct
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14. THANK YOU
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