{"id":353735,"date":"2024-02-26T08:36:16","date_gmt":"2024-02-26T08:36:16","guid":{"rendered":"\/forum\/forums\/topic\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\/"},"modified":"2024-02-26T08:36:16","modified_gmt":"2024-02-26T08:36:16","slug":"problem-in-tandem-cell-simulation-in-lumerical-fdtd","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\/","title":{"rendered":"Problem in Tandem cell simulation in Lumerical FDTD"},"content":{"rendered":"<p>I&#8217;ve started to simulate perovskite-silicon tandem solar cell. <strong>But during simulation in fdtd i saw that using solar generation monitor i got about 22 mA\/cm2 current for top perovskite cell and got only 0.5 mA\/cm2 current for bottom silicon cell. That means no light is absorbed in the bottom cell but why this happened?<\/strong> I used the structure which is given in a paper. <strong>Please help me where is the problem and how i got that kinds of result. As the two cells are series connected so the overall current is 0.5 mA\/cm2 and for that the cell efficiency is too low. What should i do now to overcome this problem? use ITO as a interconnected layer between these two cells.<\/strong><\/p>\n<p><strong>I&#8217;ll give the structure which i used to simulate.<\/strong><\/p>\n<p><strong><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/26-02-2024-1708936536-Tandem_Cell.png\" alt=\"\"><\/strong><\/p>\n","protected":false},"template":"","class_list":["post-353735","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=\"I&#039;ve started to simulate perovskite-silicon tandem solar cell. But during simulation in fdtd i saw that using solar generation monitor i got about 22 mA\/cm2 current for top perovskite cell and got only 0.5 mA\/cm2 current for bottom silicon cell. That means no light is absorbed in the bottom cell but why this happened? I\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Problem in Tandem cell simulation in Lumerical FDTD | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I&#039;ve started to simulate perovskite-silicon tandem solar cell. But during simulation in fdtd i saw that using solar generation monitor i got about 22 mA\/cm2 current for top perovskite cell and got only 0.5 mA\/cm2 current for bottom silicon cell. That means no light is absorbed in the bottom cell but why this happened? I\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/26-02-2024-1708936536-Tandem_Cell.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/26-02-2024-1708936536-Tandem_Cell.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-02-26T08:36:16+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-02-26T08:36:16+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Problem in Tandem cell simulation in Lumerical FDTD | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I&#039;ve started to simulate perovskite-silicon tandem solar cell. But during simulation in fdtd i saw that using solar generation monitor i got about 22 mA\/cm2 current for top perovskite cell and got only 0.5 mA\/cm2 current for bottom silicon cell. That means no light is absorbed in the bottom cell but why this happened? I\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/26-02-2024-1708936536-Tandem_Cell.png\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\\\/#listItem\",\"name\":\"Problem in Tandem cell simulation in Lumerical FDTD\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\\\/#listItem\",\"position\":3,\"name\":\"Problem in Tandem cell simulation in Lumerical FDTD\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/problem-in-tandem-cell-simulation-in-lumerical-fdtd\\\/\",\"name\":\"Problem in Tandem cell simulation in Lumerical FDTD | Ansys Learning Forum\",\"description\":\"I've started to simulate perovskite-silicon tandem solar cell. But during simulation in fdtd i saw that using solar generation monitor i got about 22 mA\\\/cm2 current for top perovskite cell and got only 0.5 mA\\\/cm2 current for bottom silicon cell. That means no light is absorbed in the bottom cell but why this happened? 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