Solar cell processing technologies, solar cells

altA few stages of the standard solar cell technology were substituted with cheaper and more cost-effective ones, less materials can be used.

The main area of JSC "Precizika-MET SC" activities - solar cell manufacturing process technologies. The company has launched first Lithuanian pilot solar cells production line in its Industrial Photovoltaic Laboratory. Majority of non-standard solar cell technology solutions in the laboratory are based on the so-called ideology of self-formation.  Such approach to the technology supported by computer modeling tools leads to high flexibility when manipulating the routing card steps, finding solutions which enable development of solar cells or reduce its manufacturing cost.

The laboratory has extensive experience in the area of electrochemical and electroless metal deposition. Activities are mainly focused on Ni/Cu contact deposited on silicon with perfect, low resistance ohmic contact. This technology, adapted to solar cells manufacturing needs solves few problems at once. In comparison with conventional screen printing, usually used for solar cells front contact formation, “Precizika-MET SC” proposed technology has the following advantages:

-               Significantly less expensive and simpler equipment: only standard baths for chemical processes are required;

-               No screenprinting mesh required: metal is deposited selective – only on the silicon in contact openings;

-               Cheaper materials: the main material used – copper instead of silver;

-               Saving materials: copper from the solution is deposited only to the extent necessary to form contacts. There are almost no losses of material;

-               Better contact resistance: silver paste annealed through silicon nitride layer usually has higher resistance comparing to pure copper.

Technological solutions can be applied not only in the solar cell industry, but also in other areas of microelectronics.

Barriers and Drivers

The main drivers:

- increasing demand of renewable energy;

- technology can be applied in other areas of microelectronics.

Economic Performance

Reduction of solar cell manufacturing costs.

Social Performance

Promotion of the use of solar photovoltaic energy

Environmental Impact

Decrease and saving of conventional energy sources.

Further Information

Picture source: Premet ©, 2011

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