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PV cells production

Production Lines perform 156 x156 mm polycrystalline Wafers carrying out the following phases:

  • Wafer Optical Inspection: through robotized optical system, damaged wafer were isolated before processing thus maximizing the efficiency of the following phases.
  • Superficial texturing: through the use of Hydrofluoric and nitric acids, it allows to make on the wafer a surface that maximized the capture of sunny radiation:
  • Doping and diffusion: in this step is realized the N-P junction that allow cells to work. This step involves deposition of ortho-phosphoric acid controlled by ultrasound and phosphorus diffusion in Sylicon at high temperature by a furnace in continuous loop.
  • Edge Insulation: in this phase is removed the residue ( called glass phosphor) products in the previous phase through a series of acid and basic baths. The insulation is separated by chemical way allowing the use of the energy produced.
  • Anti reflex treatment: in this step a thin layer of Sylicon nitride is deposited so allowing to control the thickness with high precision thanks to the PECVD technique.
  • Manufacture of electrodes: it is realized by depositing Aluminium and Silver metallization on the two sides of a cell in order to collect the electrical charges produced thus avoiding losses.
  • Classification: in this phase cells are measured one by one in order to characterize their electrical parameters and to test their functioning before their packaging and delivery.

Product transformationCluster 1:sollanddivisioni1_olaCluster 2:sollanddivisioni3_ola Cluster 3/4sollanddivisioni5_ola


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