{"id":314736,"date":"2023-11-03T12:02:20","date_gmt":"2023-11-03T12:02:20","guid":{"rendered":"\/forum\/forums\/topic\/lumerical-charge-meaning-of-decreasing-free-charge\/"},"modified":"2023-11-03T12:02:20","modified_gmt":"2023-11-03T12:02:20","slug":"lumerical-charge-meaning-of-decreasing-free-charge","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/lumerical-charge-meaning-of-decreasing-free-charge\/","title":{"rendered":"Lumerical CHARGE) meaning of decreasing free charge"},"content":{"rendered":"<p>Hello,<\/p>\n<p>&nbsp;<\/p>\n<p>Currently I&#8217;m running CHARGE simulation to see charge transport at some semiconductor.<\/p>\n<p>Acutally it is designated as semiconductor but its material parameters(for example, bandgap) which are those of some insulator.<\/p>\n<p>My model&#8217;s structure is &#8220;Metal-semiconductor-metal&#8221;, ground bias at one metal, and negative sweep bias to the other end.&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>And &#8220;free charge&#8221; attribute in visualizer shows decreasing profile, gradually going to reaching to positive value.&nbsp;<\/p>\n<p>According to description, free charge is &#8216;p-n&#8217;, so it means that electrons are being drained out.<\/p>\n<p>Why is that happening, even though I applied negative bias?&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Thanks,<\/p>\n<p>Sungmin<\/p>\n","protected":false},"template":"","class_list":["post-314736","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello, Currently I&#039;m running CHARGE simulation to see charge transport at some semiconductor.Acutally it is designated as semiconductor but its material parameters(for example, bandgap) which are those of some insulator.My model&#039;s structure is &quot;Metal-semiconductor-metal&quot;, ground bias at one metal, and negative sweep bias to the other end. 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