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The basic characteristics of solar cells: polarity/current-voltage characteristics Polarity of solar cellsSilicon solar cells usually have two types, N+ /P-type structure and P+ /N-type structure. When the solar cell is exposed to light, the polarity of the output voltage is: the side of the P-type electrode is positive, and the side of the N-type electrode […]
Solar cells can be divided into crystalline thin-film type and amorphous thin-film type (hereinafter referred to as a-) according to their crystalline state, and the former is divided into single crystalline and polycrystalline. According to the material, it can be divided into silicon film, compound semiconductor film and organic film. The compound semiconductor film is […]
The solar cell can be simplified as a large-area PN junction composed of silicon material, which is formed by directly combining a layer of P-type crystalline silicon and a layer of N-type crystalline silicon. In actual operation, the PN junction of a crystalline silicon solar cell is formed by the diffusion of N-type dopant atoms […]
In an isolated atom, the electrons outside the nucleus are arranged in a certain shell, and each shell contains a certain number of electrons. The electrons on each shell have discrete energy values, that is, the electrons are distributed according to energy levels. For the sake of brevity, on the graph showing the level of […]
Basic knowledge of semiconductorsAccording to the electrical conductivity of objects, natural substances can be divided into three categories: conductors, insulators and semiconductors. Generally, substances with a resistivity of less than 10-4Ω. cm are called conductors, and mainly metal materials such as gold, silver, copper, iron, etc. are good conductors. Substances with a resistivity greater than […]
Green lighting from PN junction to PN junctionSolar cells are developing at an alarming rate that is unexpected. According to conservative estimates of scientists, in the next 10 years, the average conversion efficiency of solar cells will reach more than 25%, and the price will drop by about 2/3. In the future, a large part […]
Introduction to photovoltaic power generationScientists have been studying photovoltaic power generation for two centuries. In 1839, French scientist AE Becquerel (AE Becquerel) discovered that light can make a voltaic cell with two pieces of metal immersed in the electrolyte to generate additional potential. This phenomenon was later called the “photovoltaic effect” (photovoltaic effect). effect)”, referred […]