PyroFlex™ Process of CIGS (Copper Indium Gallium diSelenide)

 

Manufacturers of Thin Film solar cells often rely on three Scribing processes called P1, P2, and P3, to increase the operating voltage of the cells to useful values. These three scribes are critical to the overall efficiency of the cells, and their yield in manufacture is an important factor in determining their cost. In many thin film manufacturing processes, laser scribing has become the preferred method. However, CIGS (Copper Indium Gallium diSelenide) has proven unusually difficult to scribe with lasers, and mechanical scribing using a diamond needle is the most commonly employed process. Sophisticated ultrafast lasers have recently been demonstrated as a potential solution, but most CIGS manufacturers consider these lasers to be too expensive and not sufficiently robust for use in a 24/7 manufacturing environment.

PyroPhotonics has demonstrated effective, high-quality laser scribing of CIGS materials using our programmable PyroFlex™-25 flexible pulsed laser. Our patent-pending process produces clean scribes with no melting of the CIGS at the sidewalls, and leaves the Mo layer undamaged. Additionally, we can also perform the P1 scribe in the difficult case of 2-Layer Molybdenum. Most commercial laser scribe processes can only scribe single-layer Moly.

CIGS P1

  • 2 distinct layers of Mo on Glass
  • Ablate the Mo
  • Leave the Glass undamaged


CIGS P2

  • CIGS on Mo
  • Ablate the CIGS
  • Leave the Mo undamaged


CIGS P3

  • TCO/CIGS on Mo
  • Ablate the TCO/CIGS
  • Leave the Mo undamaged

 

Patent Pending

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