Views: 10068 Author: Site Editor Publish Time: 2023-11-16 Origin: Site
The differences between TOPCON, HPBC, HJT, and PERC PV Module mainly lie in Solar cell technology, conversion efficiency, process complexity, and cost.
1. Solar Cell technology:
TOPCON is a Solar cell technology based on N-type silicon wafers. It utilizes a thin tunnel oxide layer and highly doped polycrystalline silicon film in the metal electrode contact region to form a passivated contact structure, thereby improving power generation efficiency.
HPBC is an independently developed cell technology based on N-type silicon wafers by Longi Green Energy Technology Co., Ltd. It adopts high-temperature processes and has a relatively high conversion efficiency.
HJT is a heterojunction solar cell that mainly involves changing the positive N-type crystalline silicon layer to amorphous silicon and using N-type silicon wafers and amorphous silicon to form a PN junction, reducing recombination losses at the PN junction.
PERC is emitter passivation and back contact cell that uses oxide local passivation technology to increase the limit efficiency to around 23%.
2. Conversion Efficiency:
The theoretical limit of TOPCON is relatively high and has significant room for improvement.
Currently, the conversion efficiency of TOPCON has reached around 25%.
The conversion efficiency of HPBC is over 25%.
The conversion efficiency of HJT is slightly higher than that of PERC batteries, up to 24.5%.
The conversion efficiency of PERC is generally around 23%.
3. Process complexity:
The process flow of TOPCON is three steps more than PERC, with a total of 12 processes.
The process flow of HPBC is similar to that of PERC but includes high-temperature processes.
The process flow of HJT is relatively simple with only seven processes.
Due to the complex process and difficulty in mass production, the cost of TOPCON is similar to that of PERC.
HPBC has a relatively low cost mainly benefiting from its high-temperature processes and mature production processes.
The cost of HJT is relatively high due to its low-temperature processes and high equipment requirements.
5. Related PV Modules: Click on different models to learn more.
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