Solar Energy Materials And Its Operations

By

Anish Das

Roll no. -14MS60R16

MATERIALS SCIENCE CENTRE

Indian Institute of Technology

KHARAGPUR, 721302 - INDIA

JANUARY, 2015107:30:08 PM

Overview

What is solar energy material How energy conversion occurs Solar radiation spectrum reaching to the

Earth Absorption coefficient and thickness Operating principle of solar cell I-V characteristics of solar cell 207:30:08 PM

What is solar energy material?

Solar energy materials are those where solar energy is made to absorb and convert to electrical energy or current

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How solar energy is converted into current

Solar radiation

Material

Electron-hole pairs generation

Electron-hole pairs separation

Voltage created407:30:08 PM

Solar radiation spectrum reaching to the earth

46% visible and 49% N-IR. So choose a material of such band gap that will be able to absorb in this region. 507:30:08 PM

Absorption coefficient and thickness of material

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Examples of some basic solar cell materials

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Some other materials are CdTe(with n-ZnS),CIGS(with n-ZnS)

CZTS(with n-ZnS). All can be used as thin film solar cell material.

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Operating principle of solar cell

First step : Choose a proper material considering

Thickness of materialOptimum band gapMinority carriers life time

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Fourth step : when electrons and holes are separated then driven those electrons out through metal electrodes (which remains in ohmic contact)

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I-V characteristics of solar cell

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Expression of current in solar cell

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The EndThe End

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Any question ?Any question ?

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