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Home > New energy > Photovoltaic Power Generation |
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 Photovoltaic Power Generation?
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Technology to convert the solar energy into electronic energy by using solar cells that consist of semiconductors, dyes, polymer and others, composing of solar cells(module), PCS and storage device.
Principles of Photovoltaic Power Generation
Solar cell is made by coating on both ends of the ¡®p-n junction of a compound semiconductor. When the semiconductor absorbed sunlight (photons) applied, electrons and holes are generated within the semiconductor, and depending on the magnetic field of the p-n junction, electrons go to the n side and holes go to the p side, and these flows reduce the electric potential difference between both ends of the junction. In other words, based on the Photovoltaic Effect that generates electricity when the semiconductor absorbs sunlight (photons), electrons generated from the semiconductor¡¯s junction make a current to be flowed out toward an external circuit.
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Types of Solar Cells |
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Advantages and Disadvantages of Photovoltaic Power Generation |
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Disadvantages |
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- No air pollution and noise
- Flexible control of generation capacity with the modularization
- Rapid construction to respond to increasing demands
- Easy maintenance and long life-span |
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- Large-area is required to secure the amount of solar radiation
- No available in night time and rainy day
- Unstable output depending on the amount of solar radiation
- High system cost and initial cost |
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