What we are sharing today is the [2023 Global Photovoltaic Cell Industry Blue Book] Report Producer: CIC Consulting.
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The photoelectric conversion efficiency of photovoltaic cells is the most critical influencing factor of photovoltaic power generation system, and it is also the only core link of the current photovoltaic industry with huge technological changes. Photovoltaic cells are divided into two categories: crystalline silicon and amorphous silicon, crystalline silicon is the absolute mainstream route in the market, and crystalline silicon cells are dominated by monocrystalline cells.
A solar cell, also known as a photovoltaic cell, is a thin semiconductor sheet and the basic unit in a photovoltaic power generation system that converts sunlight into electricity.
The process of converting light into electricity is known as the photoelectric effect. As the decisive influencing factor of photoelectric conversion efficiency, photovoltaic cells are the only core link in the main photovoltaic industry chain with huge technological changes.
Photovoltaic cells are divided into crystalline silicon and amorphous silicon (mainly thin films), crystalline silicon cells are the mainstream technology choice in the current market, and monocrystalline cells are the main ones in crystalline silicon cells. Crystalline silicon cells can be divided into p n type according to different doping elements, such as the p-type if the trivalent element boron is doped into silicon, and the n-type if the pentavalent element such as phosphorus is doped into silicon. N-type cells are further divided into TOPCON, HJT, IBC, etc. according to different technical routes.
As of the end of 2021, PERC cell technology is still the mainstream of the market. However, its conversion efficiency is approaching the limit of laboratory efficiency. Due to the bottleneck of conversion efficiency, various battery manufacturers are striving for technological improvements and breakthroughs in efficiency.
At present, n-type batteries have become the direction of high conversion efficiency in the future. By covering the back of the TOPCON cell with a thin layer of doped polysilicon deposited on the ultra-thin tunneling silicon oxide layer, a good passivation contact structure is formed, which promotes the collection of electrons by the metal during the transverse transport of electrons in the polysilicon layer, thereby effectively reducing the surface recombination and metal contact recombination, and improving the photoelectric conversion efficiency. The front and rear surfaces of the crystalline silicon substrate achieve good passivation, and the direct contact between the metal electrode and the silicon material is isolated, which further reduces the carrier recombination loss and improves the cell conversion efficiency.
XBC, that is, back-contact photovoltaic cells, its cell structure is characterized by the deposition of passivation and reflective film on the front, and the metal-free grid line, which eliminates the shading loss of the grid electrode, and the conversion efficiency is high at present and there is still high room for improvement in the future. In the future, with the development of technology, BCC combined battery technology such as TBC and HBC is expected to continue to make progress.
In the future, with the reduction of production costs and the improvement of yield, n-type batteries will become the main development direction of battery technology.
This article is for informational purposes only and does not represent any investment advice from us. To use the information, please refer to the original report. ）
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