The Working Principle Of Solar Photovoltaic Cells

Solar cells are devices that directly convert light energy into electrical energy through photoelectric effect or photochemical effect. Thin-film solar cells working on the photoelectric effect are the mainstream, while solar cells working on the principle of photochemical effect are still in their infancy. Sunlight shines on the semiconductor p-n junction, forming new hole-electron pairs. Under the action of the p-n junction electric field, holes flow from the n zone to the p zone, and electrons flow from the p zone to the n zone, and a current is formed after the circuit is turned on.

Implementation process:

The solar panels on the roof convert sunlight into DC current. Uninterruptible power supply (UPS) converts the DC energy into AC 220V/50Hz.

This electric energy can be used entirely for local equipment, or part of it, and the remaining electric energy can be sold to public utilities, or sold entirely.

It is strongly recommended that this expensive facility should be protected from lightning strikes.

Advantages and disadvantages of solar photovoltaic cells

1. Advantages

No danger of depletion; absolutely clean (no pollution, except for batteries); not restricted by the geographical distribution of resources; can generate electricity near the place where the electricity is used; high energy quality; easy for users to accept emotionally; short time to obtain energy; The power supply system works reliably.

2. Disadvantages

The irradiated energy distribution density is small; the energy obtained is related to weather conditions such as four seasons, day and night, cloudy and sunny, and the cost is relatively high.

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