deletions | additions       diff --git a/To_reach_the_SQ_limit__.md b/To_reach_the_SQ_limit__.md  index c758915..78b2e97 100644  --- a/To_reach_the_SQ_limit__.md  +++ b/To_reach_the_SQ_limit__.md 
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To reach the SQ limit, electrical and optical properties of the system must meet the ideal conditions, these include:    * infinite mobility : Each absorbed photon generates one single electron-hole pair.  * no non-radiative recombination processes : electrons will not be lost due to phonons.  * perfectly reflecting (minority carrier) contacts  * reflections from the front surface (non-ideal ARC)  * non-ideal back contact reflection (<100%)