Polycrystalline and monocrystalline are distinguished by the ingot casting method. The first is the result of a multidirectional crystallization in a crucible of cubic shape while the second comes from the method called "Czochralski or CZ" with which we obtain a single crystal of cylindrical shape. This explains, among other things, the higher final yield of monocrystalline cells since they come from a more "pure" material. We will see that it is possible to improve the yield of polycrystalline cells thanks to mono like (see corresponding question).

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