有关太阳能电池的英文PPt

Figure 3.1 The photoelectric effect of solar cells
How much energy can get from a photoelectric device depending on the following factors: 1, the size and type of material 2, the intensity of sunlight 3, the wavelength of sunlight Solar cell characteristics: 1, a much longer life span compared to human history, so it is almost limitless energy; 2, solar energy is extremely rich, 30-minute exposure to the Earth's energy is enough for annual energy consumption of the world; 3, solar energy is green energy, which will not cause any pollution;
ห้องสมุดไป่ตู้
Sun light shine over the emiconductor pn junction, producing a new hole electron pairs . Then,under the effect of electric field in the pn junction, the hole flow from the n zone area to p zone area, and the electronic from the p area to n area. After the photogenic charge carrier is connected to the circuit , the current will formated. This is the photoelectric effect, is also a solar cell’s working principle. Therefore, if form a loop circuit (circuit showed as Figure 3.1) , the energy generated from the battery in the following lighting circuit , for free electrons haveing to go along the loop back to the positive pole.
The working principle of solar cells based on semiconductor PN junction of the photovoltaic effect. The so-called photovoltaic effect is when the object is affected by light, the charge distribution within the state of the object changes the voltage and current caused by an effect. To understand the operation of solar cells do, we need to consider the material properties and taking into account the properties of sunlight. Two types of materials which can be made into solar cells, are in the usual sense of the P-type silicon and N-type silicon. In the pure silicon crystal, the number of free electrons and holes are equal. If the silicon crystal is doped with boron, aluminum, gallium, indium or other impurities which can capture electrons, then it constitutes a P-type semiconductor. If the silicon surface to release electrons by mixing phosphorus, arsenic, antimony and other impurities, then it constitutes the Ntype semiconductor. If the combination of these two semiconductors, due to the spread of electrons and holes in the transfer would be to form a PN junction surface and in the end both sides of the formation of built-in electric field.
Solar cells
太阳能电池
报告人：杜龙欢 制作小组：仇浩明、陈燕鑫、戴兴宏、刘飞龙、杜龙欢
Working principle
Solar energy is a radiant energy, which can be converted into electrical energy by means of energy converter. The energy converter accomplishing the conversion of light energy into electrical energy is called the solar cell. Solar power in two ways, one is light - heat - electricity conversion mode, the other is light - electric direct conversion .Photovoltaic solar cells to work in crystal solar cells and thin film solar cells for the mainstream, but to work wet photochemical effects of solar cells is still in its infancy