What is the structure and development of solar modules?

Solar modules play a great role in our production and life. Solar modules have a structure and development. So what is the structure and development of solar modules? Let's go take a look next.

Here is the content list:

• Solar module structure and power generation principle

• The charging development of solar modules

Solar module structure and power generation principle

The basic structure of solar modules is formed by joining P-type and N-type semiconductors. This structure is called a PN junction.

When sunlight hits general semiconductors (such as silicon), solar modules will generate electron and hole pairs, but they will quickly combine and convert energy into photons or phonons (heat). Photons are related to energy. Phonons are related to momentum. Therefore, the lifetime of electrons and holes is very short. In the P-type, due to the higher hole density, the holes generated by light have a longer life span. Similarly, in the N-type semiconductor, electrons have a longer life span.

At the junction of the PN semiconductor, the diffusion caused by the difference in the effective carrier concentration of the solar module will generate a built-in electric field directed from N to P. Therefore, when the photon is absorbed by the semiconductor at the junction, the generated electrons will be the electric field moves to the N-type semiconductor, and the holes move to the P-type semiconductor. Therefore, it can accumulate charges on both sides of the solar module. If it is connected by a wire, it can generate current. The challenge of the solar module is how the generated electron-hole pairs are collected before recombination.

Most of the energy of the light from the sun falls between 1 – 3 eV. Therefore, for a single PN junction, if it is properly designed so that the peak of the solar module's absorption of light energy falls at about 1.5 eV, it can be the best efficiency. Since the electricity generated by solar modules is direct current, if you need to provide electricity to household appliances or various electrical appliances, you need to install a solar module inverter before it can be used.

The charging development of solar modules

Solar modules are used in consumer products, and most of them have charging problems. In the past, nickel-metal hydride or nickel-cadmium dry batteries were generally used for charging. However, the solar module nickel-hydrogen dry batteries cannot withstand high temperatures, and the solar module nickel-cadmium dry batteries have environmental pollution problems. In recent years, supercapacitors have developed rapidly, with large capacitors, small areas, and low prices. Therefore, some solar products have begun to use supercapacitors as charging objects, thus improving many problems of solar charging: Make the solar module charge faster. The life span of solar modules has increased by more than 5 times. The charging temperature range of solar modules is wide, which reduces the number of solar modules (low-voltage charging is possible).

To manufacture better solar modules, the manufacturer of Anhui JF Solar Technology Co., Ltd. (JF Solar) thoroughly implements the construction concept of solar modules and develops the charging of solar modules. If you are interested in solar modules, please contact us, our website is https://www.jf-solartech.com/.