- SCHMID Group optimizes the manufacturing process of PERC cells, thereby reducing the consumption of chemicals
- Easy to retrofit: Selective emitter to increase the efficiency
Get to know the innovations of the SCHMID Group at a trade show:
SNEC in Shanghai, May 24 – 26, 2016 (hall E3, booth 365)
Intersolar Europe in Munich, June 22 – 24, 2016 (hall A2, booth 160)
A large part of the red light (long wave) penetrates conventional solar cells without power generation. Since the introduction of PERC technology this light is exploited as well: A dielectric layer on the back of the cell reflects the light which penetrates through to the rear side without generation of charge carriers. The photons thus obtain a “second chance” to generate electricity. Consequently the efficiency of the solar cell increases.
The smoothest possible back surface should be used to minimize recombination on the back of the solar cell. The surface on the front, however, should still be textured. The problem: Since both sides are textured in a batch process, the texture on the back must be removed again in a separate step. This always devours large quantities of chemistry. The solution: The SCHMID Inline System for alkaline texture. The wafers are irrigated with potassium hydroxide and additives from above and thus are textured; at the same time the process ensures a smoother back, which SCHMID will polish later in high quality.
