JUNHE®2570 Auxiliary additives for removing amorphous silicon of TopCon cells
Product Details
Introduction
JUNHE®2570 is a water-soluble, non-toxic and non-hazardous auxiliary additive developed by JUNHE for the removal of amorphous silicon from photovoltaic Topcon cells, which meets the requirements of environmental protection. This product can greatly improve the corrosion selectivity ratio of inorganic alkali to the amorphous silicon winding plating layer of Topcon cell, and greatly reduce the corrosion of inorganic alkali to the positive film silicon dioxide layer or PSG layer while realising the etching of silicon.
Significantly reduces the amount of chemicals used and is much lower than competing products in the market in terms of leakage percentage.
Features
- Environmental friendly：Selective etching can be achieved without the use of organic bases such as TMAH.
- Low production cost：Compared with the market pre-treatment using hydrofluoric acid / nitric acid, the production cost is greatly reduced.
- High etching efficiency：Compared with Perc cell process, the conversion efficiency is significantly improved.
| Wafer size | Appearance | Photoelectric Conversion | Lifespan |
| 210mm | The etching surface is normal and the positive film has no corrosion. | 24.4%~24.6% | 240+ |
Technical Parameters
| First liquid dispensing | Liquid infusion | Intermission-draining | Temperature | Reaction time | |
| 48%KOH | 8~10L | 0.3~0.45L | 5~7L | 63~64 | 100~200 |
| Additive JH2570 | 2.0~4.0L | 0.18~0.21L | |||
| Pure water | 440.0L | / |
These properties may vary depending on the single crystal silicon wafer, process, batch, and size.
Application area
- This product is designed for Topcon cell to remove amorphous silicon winding plating process
- Can be applied to 210, 186, 166, 158mm specifications of the single crystal
