Working Principle of a Semiconductor Based Solar Cell Band Gap II - - - PowerPoint PPT Presentation

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working principle of a semiconductor based solar cell
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Working Principle of a Semiconductor Based Solar Cell Band Gap II - - - PowerPoint PPT Presentation

Sep 27, 2023 106 likes •287 views

Working Principle of a Semiconductor Based Solar Cell Band Gap II - Electrons in Molecular Bonds Week 2.2.2 Arno Smets Bonding of electrons in Si network 3p 3s Bonding of electrons in Si network 3p 3s Molecular description of band gap

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SLIDE 1

Arno Smets

Working Principle of a Semiconductor Based Solar Cell

Band Gap II - Electrons in Molecular Bonds

Week 2.2.2

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SLIDE 2
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SLIDE 3

Bonding of electrons in Si network

3s 3p

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SLIDE 4

Bonding of electrons in Si network

3s 3p

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SLIDE 5
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Molecular description of band gap

sp3 sp3 Bonding Anti-Bonding

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SLIDE 7

Molecular description of band gap

Bonding Anti-Bonding sp3 sp3

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SLIDE 8

Molecular description of band gap

sp3 sp3 Bonding Anti-Bonding

conduction valence Band gap Band gap

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SLIDE 9

Molecular description of band gap

conduction valence Band gap

LUMO HOMO

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Semiconductor Materials

IV semiconductors: Si, Ge

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Carbon, silicon and Germanium

Lattice constant

Lattice constant = Bond Length

4 3 

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Semiconductor Materials

IV semiconductors: Si, Ge III-V semiconductors: GaAs:

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SLIDE 14
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Semiconductor Materials

IV semiconductors: Si, Ge III-V semiconductors: II-VI semiconductors CdTe: GaAs:

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SLIDE 16
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SLIDE 17