Your daily dose of photovoltaic technology developments and solar news

• Popular Technical Papers

  • Overview of automation in the photovoltaic industry
  • Understanding moisture ingress and packaging requirements for photovoltaic modules
  • Evaluation of encapsulant materials for PV applications
  • Inline processing of crystalline silicon solar cells: the holy grail for large-scale manufacturing?
  • PV sector outlook: an analyst’s perspective

• Featured Technical Papers

  • Transparent conducting oxide deposition techniques for thin-film photovoltaics
  • Comprehensive and advanced quality assurance measures for optimal yields from PV power plants
  • Surface passivation of silicon solar cells using industrially relevant Al2O3 deposition techniques
  • Influence of a-Si:H deposition temperature on thermal stability of a-Si:H/SiNx:H stacks
  • Integrated loops: a prerequisite for sustainable and environmentally-friendly polysilicon production

“Handle with care” – this world-renowned warning sign is inherently printed on every wafer until it is safely wrapped into a finished module – and for good reason. Despite the declining price of silicon and the improved manufacturing methods, the raw wafer still has a major share in the overall cost of a module. If we assume an average wafer price of €2.70 for a 156mm multicrystalline wafer, the finished cell will cost about €4. Adding in the module manufacturing costs, a cell in a typical module will cost €5. Hence, the wafer accounts for more than 50% of the total manufacturing
costs, and as such is key to optimizing the costs in the solar value chain for crystalline photovoltaic products. This paper offers some guidelines on the wet wafer separation process that are intended to aid in minimizing the cost associated with wafer breakage.

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