How solar battery work

<p>Solar battery&nbsp;are mainly based on semiconductor materials. Photoelectric materials are used to absorb light energy and then undergo photoelectric conversion to make it generate current. Today, <a href="https://www.ufo-battery.com/solar-battery" rel="noopener noreferrer" target="_blank">solar&nbsp;battery&nbsp;supplier</a> tells you what is the working principle of solar battery?</p><p><br></p><p>1. The working principle of solar battery-introduction</p><p>A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. It uses the principle of photoelectric conversion to convert the sun’s radiation into electrical energy through semiconductor materials. This photoelectric conversion process is usually called "photovoltaic Therefore, solar battery&nbsp;are also called “photovoltaic cells”. As long as it is exposed to light, voltage and current can be output instantly, which is called solar photovoltaic in physics, or photovoltaic for short. Thin-film solar battery&nbsp;working with the photoelectric effect are the mainstream, while wet solar battery&nbsp;working with the photochemical effect are still in their infancy.</p><p><br></p><p>2. The working principle of solar battery-structure and function</p><p>The solar cell is composed of high-efficiency crystalline silicon solar battery, tempered glass, EVA, transparent TPT backplane and aluminum alloy frame. The solar cell module is the core part of the solar power system and the most important part of the solar power system; it has the characteristics of long service life and strong mechanical resistance to external forces. The functions of each part of the solar cell module are as follows:</p><p><br></p><p>Toughened glass-the function is to protect the main body of power generation, and its selection of light transmission requires high light transmission and ultra-white tempered treatment.</p><p><br></p><p>EVA---- Used to bond and fix the tempered glass and the main body of power generation. The quality of the transparent EVA material directly affects the life of the component.</p><p>Cells-the main function is to generate electricity. The mainstream in the power generation market is crystalline silicon solar battery&nbsp;and thin-film solar battery. Both have their own advantages and disadvantages.</p><p>Backplane-the role is to seal, insulate, and waterproof.</p><p>Aluminum alloy ---- protect the laminate, play a certain sealing and supporting role.</p><p>Junction box-protects the entire power generation system and acts as a current transfer station.</p><p>Silicone ---- Sealing function, used to seal the junction of components and aluminum alloy frame, components and junction box</p><p><br></p><p>The basis of the working principle of solar battery&nbsp;is the "photovoltaic" effect of the semiconductor PN junction. The so-called photovoltaic effect, to put it simply, is an effect in which the charge distribution state in the body changes when an object is exposed to light to produce electromotive force and current. This effect can be produced in gases, liquids and solids, but in solids, especially in semiconductors, the efficiency of converting light energy into electrical energy is particularly high. Therefore, the photoelectric effect in semiconductors has attracted special attention and has been studied most. Invented and manufactured semiconductor solar battery.</p><p><br></p><p>When sunlight irradiates the PN junction, the electrons in the semiconductor release electrons due to light energy, correspondingly generate electron-hole pairs, and under the action of the barrier electric field, the electrons are driven to the N-type region. The holes are driven to the P-type region, so that there are excess electrons in the N region and excess holes in the P region; thus, a photo-generated electric field opposite to the barrier electric field is formed near the PN junction. A part of the photogenerated electric field cancels the barrier electric field, and the rest makes the P-type zone positively charged and the N-type zone negatively charged; thus, the electromotive force generated by the thin layer between the N zone and the P zone is called "photovoltaic" electromotive force. When the external circuit is connected, there will be power output.</p><p><br></p><p>This is the basic principle of PN junction contact silicon solar cell power generation. If dozens or hundreds of solar battery cells are connected in series and in parallel to form a solar battery module, under the sunlight, electrical energy with a certain power output can be obtained.</p><p><br></p>