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1. Presented by
Imran Hossain Chowdhury
EEE,44th batch
ID:191-141-002
Material For Different Types of Solar
Cell Construction For Higher
Efficiency
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2. Solar Cell
 Photovoltaic Device
 Converts Light Energy into Electrical Energy
 Works on Photovoltaic Effect
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3. Construction of Solar Cells
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4. Types of Solar Cells
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5. Crystalline Silicon Solar Cells
 Crystalline Silicon is main material
 Single crystals are used to create Mono-
crystalline Solar Cells
 Multiple crystals are used for Polycrystalline Solar
Cells
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6. Mono-crystalline Solar Cells
 Contains a Silicon wafer
 Single crystal is formed using the Czochralski
Method
 Efficiency above 20%
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7. Polycrystalline Solar Cells
 Made by melting raw Silicon
 Polycrystalline panels are made of Silicon Solar
Cells
 The cooling process is different
 Efficiency around 15%
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8. Thin Film Solar Cells
 Manufactured by placing one or more films of
photovoltaic material (such as silicon, cadmium or
copper) onto a substrate.
 Thin-film photovoltaic are around 100 times
thinner.
 Made from amorphous silicon (a-Si).
 Copper Indium Gallium Diselenide (CIGS),
Amorphous Silicon
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9. Amorphous Silicon Cells
 Used mainly in such pocket calculators
 Less effective than crystalline silicon
 Formed by vapor-depositing a thin layer of silicon
material
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10. CIGS Solar Cells
 Compound semi-conductor material
 Solid Solution of Copper Indium Selenide
 Tetrahedrally bonded semiconductor
 High Absorption Coefficient
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11. Third Generation Solar Cells
 Combination of the crystalline silicon and thin-
film solar cells
 Feature multiple junctions made up from layers of
different semiconducting materials
 Cheaper & High Efficient
 Able to achieve around 30% efficiency
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12. Cadmium Telluride Solar Cells
 Low cost
 consist of a p-n hetero-junction structure
containing a p-doped CdTe layer matched with an
n-doped cadmium sulfide (CdS).
 Vapor-transport deposition and close-spaced
sublimation.
 Transparent conductive oxide (TCO) layer.
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13. Concentrated PV Cell
 Efficiency rate up to 41%
 Curved mirror surfaces, lenses and sometimes even
cooling systems are used
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14. Efficiency
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15. End Of Presentation
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