TOPCon solar cell technology is one of the latest trends in the solar energy industry and is an upgraded and more advanced version of PERC/PERT technology. This issue will introduce the advantages, disadvantages and prospects of TOPCon cells.

Advantages of TOPCon Cell

1. Solar cells have high conversion efficiency, excellent interface passivation and carrier transport capabilities, and high Voc and FF;

2. The light-induced attenuation is low, and the boron content in phosphorus-doped N-type crystalline silicon is extremely low, which weakens the influence of boron and oxygen pairs;

3. The process equipment production line has high compatibility and is compatible with the high-temperature preparation process production lines of PERC and N-PERT bifacial cells;

4. N-type TOPCon solar cells can be combined with SE, IBC, multi-busbar, half-chip, and lamination technologies to significantly improve cell efficiency and module power.

Disadvantages of TOPCon cell

1. The cost is high. Compared with the standard PERC process, the capital expenditure of TOPCon technology is about 10% higher and the operating cost is about 25% higher;

2. The potential for efficiency improvement is limited.

Cost reduction optimization direction

1. Reduce the thickness of the n-poly layer, reduce costs, and reduce free carrier absorption;

2. Avoid edge plating and improve cell performance;

3. Equipment maturity and cost reduction;

4. Breakthrough in slurry performance.

In order to further improve cell efficiency, the photovoltaic technology route has been upgraded from P-type to N-type, initiating the next round of cell technology changes. TOPCon has attracted more and more attention from the market due to its excellent efficiency and compatibility, and has become the entry point for the industrialization of N-type high-efficiency cells.

3D Confocal Microscope

E-mail: market@millennialsolar.com

3D Confocal Microscope ME-PT3000 is a high-speed confocal scanning microscope for accurate and reliable 3-dimensional (3D) measurements. Real-time confocal microscopy images are achieved through fast optical scanning modules and signal processing algorithms.

ME-PT3000 is an optical instrument specially used in the photovoltaic industry to inspect the quality of grid lines and textures on the surface of photovoltaic cells. Based on the principle of optical technology, combined with precision Z-direction scanning module, 3D modeling algorithm, etc., the device surface is non-contactly scanned and a 3D image of the surface is established. The height and width of the grid lines on the photovoltaic cells and the texture on the surface are measured through the system software. The number of pyramids is quantitatively tested to provide feedback on the quality of photovoltaic cell cleaning, texturing and screen printing processes.

TOPCon solar cell technology has broad prospects and the potential for rapid development in the solar industry. When considering an emerging technology like this, you still need to compare it with other popular photovoltaic technologies on the market to better see its prospects. If you have any questions, please contact us.