Buried screen-printed contacts for silicon solar cells

A Simple way to improve solar cell efficiency is to enhance the absorption of light and reduce the shading losses. One of the main objectives for the photovoltaic roadmap is the reduction of metalized area on the front side of solar cell by fin lines. Industrial solar cell production uses screen-pri...

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Main Author: Jamshidi Gohari, Ebrahim
Format: Others
Language:English
Published: Högskolan Dalarna, Energi och miljöteknik 2012
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:du-13593
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spelling ndltd-UPSALLA1-oai-DiVA.org-du-135932014-01-09T05:06:33ZBuried screen-printed contacts for silicon solar cellsengJamshidi Gohari, EbrahimHögskolan Dalarna, Energi och miljöteknik2012Laser scribingBuried ContactsScreen-printingscreen-printed.A Simple way to improve solar cell efficiency is to enhance the absorption of light and reduce the shading losses. One of the main objectives for the photovoltaic roadmap is the reduction of metalized area on the front side of solar cell by fin lines. Industrial solar cell production uses screen-printing of metal pastes with a limit in line width of 70-80 μm. This paper will show a combination of the technique of laser grooved buried contact (LGBC) and Screen-printing is able to improve in fine lines and higher aspect ratio. Laser grooving is a technique to bury the contact into the surface of silicon wafer. Metallization is normally done with electroless or electrolytic plating method, which a high cost. To decrease the relative cost, more complex manufacturing process was needed, therefore in this project the standard process of buried contact solar cells has been optimized in order to gain a laser grooved buried contact solar cell concept with less processing steps. The laser scribing process is set at the first step on raw mono-crystalline silicon wafer. And then the texturing etch; phosphorus diffusion and SiNx passivation process was needed once. While simultaneously optimizing the laser scribing process did to get better results on screen-printing process with fewer difficulties to fill the laser groove. This project has been done to make the whole production of buried contact solar cell with fewer steps and could present a cost effective opportunity to solar cell industries. <p>In collaboration with Institute for Photovoltaics <strong><em>IPV</em></strong>, University of Stuttgart.</p>Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:du-13593application/pdfinfo:eu-repo/semantics/openAccess
collection NDLTD
language English
format Others
sources NDLTD
topic Laser scribing
Buried Contacts
Screen-printing
screen-printed.
spellingShingle Laser scribing
Buried Contacts
Screen-printing
screen-printed.
Jamshidi Gohari, Ebrahim
Buried screen-printed contacts for silicon solar cells
description A Simple way to improve solar cell efficiency is to enhance the absorption of light and reduce the shading losses. One of the main objectives for the photovoltaic roadmap is the reduction of metalized area on the front side of solar cell by fin lines. Industrial solar cell production uses screen-printing of metal pastes with a limit in line width of 70-80 μm. This paper will show a combination of the technique of laser grooved buried contact (LGBC) and Screen-printing is able to improve in fine lines and higher aspect ratio. Laser grooving is a technique to bury the contact into the surface of silicon wafer. Metallization is normally done with electroless or electrolytic plating method, which a high cost. To decrease the relative cost, more complex manufacturing process was needed, therefore in this project the standard process of buried contact solar cells has been optimized in order to gain a laser grooved buried contact solar cell concept with less processing steps. The laser scribing process is set at the first step on raw mono-crystalline silicon wafer. And then the texturing etch; phosphorus diffusion and SiNx passivation process was needed once. While simultaneously optimizing the laser scribing process did to get better results on screen-printing process with fewer difficulties to fill the laser groove. This project has been done to make the whole production of buried contact solar cell with fewer steps and could present a cost effective opportunity to solar cell industries. === <p>In collaboration with Institute for Photovoltaics <strong><em>IPV</em></strong>, University of Stuttgart.</p>
author Jamshidi Gohari, Ebrahim
author_facet Jamshidi Gohari, Ebrahim
author_sort Jamshidi Gohari, Ebrahim
title Buried screen-printed contacts for silicon solar cells
title_short Buried screen-printed contacts for silicon solar cells
title_full Buried screen-printed contacts for silicon solar cells
title_fullStr Buried screen-printed contacts for silicon solar cells
title_full_unstemmed Buried screen-printed contacts for silicon solar cells
title_sort buried screen-printed contacts for silicon solar cells
publisher Högskolan Dalarna, Energi och miljöteknik
publishDate 2012
url http://urn.kb.se/resolve?urn=urn:nbn:se:du-13593
work_keys_str_mv AT jamshidigohariebrahim buriedscreenprintedcontactsforsiliconsolarcells
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