Organic Solar Cells, The Next Frontier


	Organic Solar Cells, The Next Frontier

PatrisTimoris

7-19-2007 2:04 AM

565 views

tags:

science, physics, polymers, photovoltaic, solar energy, energy

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/cedb679f-1b86-46b5-9264-5f1d7a696a60/AA325732-4D9E-46B6-8E89-01A7EC4FDF30/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.goletavalleyvoice.com/cgi-bin/county/readarticle.cgi?article=1490" href="http://www.goletavalleyvoice.com/cgi-bin/county/readarticle.cgi?article=1490" style="font-size: 11px;">www.goletavalleyvoice.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.goletavalleyvoice.com/cgi-bin/county/readarticle.cgi?article=1490"><FONT size="2" face="verdana">While conventional organic solar cells are comprised of single sheets of material, the new “tandem” organic solar cell is made of two multilayered parts that work together to gather a wider range of the spectrum: they collect both the shorter and longer light wavelengths. The architecture of the cells — two organic photovoltaic cells with different light absorption characteristics linked by a transparent layer of titanium oxide — is the equivalent of two cells in series, said Heeger.</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.goletavalleyvoice.com/cgi-bin/county/readarticle.cgi?article=1490"><FONT size="2" face="verdana">As a result, the tandem cell has a 6.5 percent efficiency.</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.goletavalleyvoice.com/cgi-bin/county/readarticle.cgi?article=1490"><FONT size="2" face="verdana">“This is the highest level achieved for solar cells made from organic materials,” Heeger said.<BR />Silicon-based solar cells typically convert about 12 percent to 15 percent of solar energy to electricity, while previous organic photovoltaic cells converted up to about 6 percent.</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.goletavalleyvoice.com/cgi-bin/county/readarticle.cgi?article=1490"><FONT size="2" face="verdana">To provide energy for today’s electronics, organic photo cells need an efficiency of around 10 percent, but it shouldn’t take long to get there.</FONT></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/AA325732-4D9E-46B6-8E89-01A7EC4FDF30/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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