Solar street lamps, the PERC photovoltaic technology why popular?

Editor's note: the PERC components for the next three years the market share will rise sharply, the mainstream products. For component manufacturers, solar energy, is transferred to the PERC technology production line just minimum modification to the existing battery production line can easily produce the high quality product, without having to pay a large amount of capital to update existing equipment thoroughly. In addition, the panels of the PERC technology provides more freedom to developers and designers.

at present, the PERC photovoltaic module production line has become almost mainstream component manufacturer's standard, its efficiency is higher than the traditional components of 1% or more. According to the analysis, the PERC components over the next three years the market share will rise sharply, the mainstream products. So, what is the PERC technology?

what is the PERC technology

the PERC ( PassivatedEmitterandRearCell) Called the batteries, and other Emitter and passivation on the back of the battery & throughout; From conventional aluminum back battery ( BSF) Structure naturally derived. Conventional BSF cell due to back the metal aluminium film layer on the surface of the composite speed cannot be dropped to below 200 cm/s, causes to aluminum layer of the infrared radiation of light only 60 - back 70% can be reflected, produce more photoelectric loss, therefore have inherent limitations in terms of the photoelectric conversion efficiency; But the PERC technology by enclosed medium passivation layer on the back of the battery, can greatly reduce the loss of photoelectric, by raising the photovoltaic battery photoelectric conversion efficiency of 1% or so. PERC is an innovative battery and component assembly.

the road to development is not flat,

the PERC battery first originated in the 1980 s, 1989 by the university of new south wales in Australia MartinGreen team officially reported for the first time in AppliedPhysicsLetter PERC battery structure, then reach 22. 8% of the laboratory battery efficiency. In 1999, the lab research of PERC batteries have a conversion efficiency of 25% of the world record. PERC battery, for the preparation of the photolithography, evaporation and thermal oxygen passivation, such as electroplating technology.

in the traditional photovoltaic cells, with aluminum metallized layer, it on the back of the battery contacts across the region. Photons to battery and electronics, the electrons are only to the top layer to generate electricity. Longer wavelength often inspire electronic is located near the bottom of the battery, the electrons will likely to be absorbed, and could never reach the emission layer, this will only lead to component fever.

the PERC biggest difference is that with conventional battery back to dielectric film coated, using local metal contact, greatly reduce the back surface recombination velocity, while increasing the back surface of the light reflection. PERC technology by raising the battery's ability to capture the light under the longer wavelength to improve efficiency, especially in the case of early in the morning and in the evening or cloudy. PERC technology between batteries and aluminum layer adds a thin layer of dielectric layer. Through any battery does not produce electronic light will be reflected this layer medium. Therefore, the light has a second chance to produce optoelectronic.

the PERC component has not been large-scale market

and all the new technology, solar portal, the PERC technology has also gone through some growing pains.

first, higher costs. Because the battery has a multilayer, in the PERC need more steps in the production of photovoltaic cells, solar panels, which can lead to higher costs. At present, the PERC photovoltaic component price is RMB 2 / watt. To enhance the efficiency of the current favorable situation, the PERC increased faster than the cost, the cost of raw materials is declining, and the trend shows that the PERC will replace the traditional battery structure.

second, caused by light attenuation ( LID) Impact. Light attenuation refers to the components for the first time to power loss percentage after exposed to light. Due to the high doping level PERC battery, so after using the PERC technology, light attenuation to the negative effect will increase.

the industry on the PERC technology

at present, the increase in the global market the PERC technology of boom has begun, China solar power network, and will continue to grow rapidly in the coming years.

for component manufacturers, transferred to the PERC technology production line just minimum modification to the existing battery production line can easily produce the high quality product, solar portal, without having to pay a large amount of capital to update existing equipment thoroughly.

in addition, the panels of the PERC technology provides more freedom to developers and designers.

the PERC component power per unit area is higher, under the condition of weak light and high temperature performance is good. Considering the total generating capacity rather than peak power, obviously the PERC component is superior. Designers can use fewer components to achieve the total power output, and covers an area of less.

the original title: why the PERC photovoltaic technology popular?