<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Dear all<br><br>My query is not related to Quantum-espresso code, as it is supposed to be in this forum. I want to know which impurities are preferred for a semiconductor for practical use, those creating a shallow level or those creating a deep level ? I would also like to know any material which can give me details of this information.<br>Thanks in advance.<br><br>Regards <br>Padmaja Patnaik<br>
Research Scholar<br>
Dept of Physics<br>
IIT Bombay<br>
Mumbai, India</td></tr></table><br>