What is solar photovoltaic technology? Discuss its underlying principle and applications.

Solar photovoltaic (PV) technology is a method of harnessing solar energy to generate electricity through the use of photovoltaic cells. These cells are made of semiconductor materials, typically silicon, that convert sunlight directly into electricity through the photovoltaic effect. This technology has garnered significant attention due to its potential to provide clean, renewable energy and reduce dependence on fossil fuels.

### Underlying Principle:

The underlying principle of solar photovoltaic technology lies in the photovoltaic effect. This effect occurs when certain materials, such as silicon, are exposed to sunlight, causing them to release electrons. These electrons create an electric current when captured, thus generating electricity. The process can be broken down into the following steps:

1. Absorption of Photons: When sunlight, composed of photons, strikes the surface of the photovoltaic cell, the semiconductor material absorbs the photons.

2. Generation of Electron-Hole Pairs: The absorbed photons transfer their energy to electrons in the semiconductor material, causing them to break free from their atomic bonds. This ________ _________ ____ __________ _____ ________ ________ ____.
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