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How does a photovoltaic cell of a solar projector generate electricity?
时间:2018-12-23 浏览:1783次

Introduction: Solar energy resources are very rich, this article will be how to generate electricity from the photovoltaic cells of the science solar light.

    Solar cells are devices that use the principle of photoelectric conversion to convert solar radiation into electrical energy through semiconductor materials. This photoelectric conversion process is often called "photovoltaic effect", so solar cells are also called "photovoltaic cells." The so-called photoelectric effect is that when some semiconductor materials are exposed to light, the number of carriers will increase sharply, and the conductivity will increase, which is the photosensitive property of the semiconductor. Sunlight illuminates the silicon of a solar photovoltaic cell, causing a dramatic increase in the number of carriers in the silicon wafer. Meanwhile, in the PN junction, the positively charged holes in the N-type semiconductor move toward the P-type region, and the negatively charged electrons in the P-type region move toward the N-type region, thereby forming a current from the N-type region to the P-type region. A potential difference is then formed in the PN junction, which forms a power source, which means that the solar photovoltaic cell is powered. If the solar photovoltaic cell and the electric lamp are connected by wires as shown in the figure, the solar cell will emit electricity when the sunlight is irradiated, and the electric lamp will be lit.


Solar flood light generation principle


    From the above examples, it can be found that the mystery of solar photovoltaic cells is on this "PN junction". The PN junction acts like a wall, hindering the movement of electrons and holes. When the solar photovoltaic cell is exposed to sunlight, the electron receives light energy and moves to the N-type region, so that the N-type region is negatively charged, and the hole moves toward the P-type region, so that the P-type region is positively charged. This causes a potential difference across the PN junction, which is known as the voltage.

     Solar power projection photovoltaic cells are generated as above. Nuusolar manufactures high quality solar lighting products for you.


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