CdTe Advantage

Background

W&K Solar’s CdTe thin-film solar modules are manufactured with a stable production process with automated manufacturing facility to provide cost effective, good stability and high efficiency solar modules.

  •  The pioneering engineers and technical team managing the facility setup each have over 30 years in the glass and photovoltaic industries. Management team members participated in several solar industry start ups.
  • The core production coating process is the result of the years of cumulative knowledge acquired from previous setups and is one of the most refined in the industry.

Cadmium Telluride thin-film solar modules have some distinct advantages over other common solar PV technologies:

  • Hot climate advantage: CdTe modules have a better temperature co-efficient than typical silicon modules. This means that in tropical, equatorial or desert climates where module temperatures can reach 60-70 celsius, CdTe modules can reach up to 90% of their peak output, where silicon modules may be reaching only 80% or less of their peak rated output. This leads to increased overall yield for a given installation size, and explains why CdTe has gained extremely positive feedback and a high market share in major solar markets such as India and Thailand.
  • Cloud/haze advantage: CdTe modules have a wider collection bandwidth across the light spectrum than silicon, so on cloudy or hazy conditions will perform closer to their peak rated output.

CdTe Environmental & Safety Facts

  • CdTe in PV is much safer than other current Cd uses
  • CdTe PV uses Cd 2500 times more efficiently than NiCd
  • CdTe used in PV is in an environmental stable form that does not leak into the environment during normal use or foreseeable accident
    Absolutely no emissions during PV operation
  • CdTe modules do not pose a risk during fires. CdTe has an extremely low vapour pressure, high boiling and melting points and is almost completely encapsulated by molten glass when exposed to fire. Exposure of pieces of CdTe PV modules to flame temperatures from 760 to 1100°C illustrated that CdTe diffuses into glass, rather than being released into the atmosphere. Higher temperatures produce further CdTe diffusion into the glass.