deletions | additions       diff --git a/CdTe_PVs_have_several_features__.md b/CdTe_PVs_have_several_features__.md  index 2be6194..acb9f8e 100644  --- a/CdTe_PVs_have_several_features__.md  +++ b/CdTe_PVs_have_several_features__.md 
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CdTe PVs have several features which make it especially attractive:   * The cell is produced from polycrystalline materials and glass, which is a potentially much cheaper construction than bulk silicon.  *The chemical and physical properties of the semiconductors are such that the polysilicon thin-films can be deposited using a variety of different * Simple deposition  techniques (see below). have beendeveloped suited for low-cost production.  * CdTe has a bandgap (1.49 eV) which is very close to the theoretically-calculated optimum value for solar cells under unconcentrated AM1.5 sunlight (1.34eV).  * CdTe has a direct band gap leading to a high absorption coefficient ( \( \alpha > 5\times 10^{5} cm^{-1}\) ). A layer of 2µm is enough to absorb around 99% of incident light which translates in less material.