• Question: what materials have you found that can absorb light ?

    Asked by 227frah46 to Lewis on 12 Mar 2017.
    • Photo: Lewis Wright

      Lewis Wright answered on 12 Mar 2017:

      Silicon is the most widely used, as it was the first to be researched.

      There are lots of different alloys (mixtures of elements), such as Cadmium Telluride (CdTe), Gallium Arsenide (GaAs), Copper-Indium-Sulfide (CIS) and Copper-Indium-Gallium-Sulfide (CIGS), and my material Copper-Zinc-Tin-Sulfide (CZTS).

      There is also a type of material called Perovskite, which has showed improvements over 10 years which some materials have taken 50 years to achieve. Perovskites come in lots of different combinations, and is far too complicated for me!

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