deletions | additions       diff --git a/A_PV_will_reach_the__.md b/A_PV_will_reach_the__.md  index 2ca600e..48ae5ea 100644  --- a/A_PV_will_reach_the__.md  +++ b/A_PV_will_reach_the__.md 
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A PV will reach the SQ limit if it's material properties match the assumptions made to derive to derive this limit. Following we can compare these assumptions with real material conditions:  * All incident light is absorbed below the band gap of the material, and each absorbed photon generates an electron-hole pair.  * **Recombination is direct** (band to band) and no radiative recombination is present.light extraction to become part of all future designs  * There are otherwise no limitations on the transport of charge (**infinite mobility**, **infinite mobility** and  **perfectly reflecting contacts**): contacts**, which relate to charge transport:  Photons emitted internally are likely to be trapped, re-absorbed, and re-emitted, leading to photon recycling in a open-circuit. Real materials have a non-ideal back contact, so they will not benefit completely from the photon recycling that occurs in a ideal reflecting system. \cite{Miller_2012}, Real materials also have finite carrier mobility, which relates translate  to series resistance losses.