Solar cell and solar-cell module,申请号US201113992015-传众专利搜索

Solar cell and solar-cell module

申请公布号：US9224888(B2)

申请号：US201113992015

申请日期：2011.12.01

申请公布日期：2015.12.29

申请人：

SHIN-ETSU CHEMICAL CO., LTD.

发明人：Hashigami Hiroshi;Ishikawa Naoki;Watabe Takenori;Otsuka Hiroyuki

分类号：H01L31/0224;H01L31/068

主分类号：H01L31/0224

代理机构：

Westerman, Hattori, Daniels & Adrian, LLP

代理人：Westerman, Hattori, Daniels & Adrian, LLP

地址：Tokyo JP

摘要：A solar cell has a passivation film formed on a crystalline silicon substrate that has at least a p-n junction, and an electrode formed by printing and heat-treating a conductive paste. The solar cell has a first electrode comprising an extraction electrode, which extracts photogenerated carriers from the silicon substrate, formed so as to contact the silicon substrate and a second collector electrode, which collects the carriers collected at the extraction electrode, formed so as to contact the first electrode. Other than the point of contact between the first electrode and the second electrode, at least, the second electrode contacts the silicon substrate only partially or not at all. By leaving the passivation film between the collector electrode and the silicon, either completely or partially, the solar cell reduces charge losses at electrode/silicon interfaces, improves the short-circuit current and open voltage, and yields improved characteristics.

主权项：1. A solar cell comprising a crystalline silicon substrate having at least a p-n junction, a passivation film formed thereon, and electrodes formed thereon by printing and heat treating a conductive paste, characterized in that the electrodes include a first electrode consisting of an extraction electrode which may contact the silicon substrate for extracting photogenerated carriers from the silicon substrate, and a second electrode consisting of extraction and collector electrodes having a higher conductivity than the first electrode, which is formed on the first electrode and passive film, wherein the first electrode is entirely overlaid with the extraction electrode portion and a part of the collector electrode portion of the second electrode, the collector electrode portion of the second electrode may contact the first electrode partially for collecting the carriers drawn in the first electrode, and the collector electrode portion of the second electrode and the silicon substrate contact only partially or nowhere outside the point of contact between the first electrode and the collector electrode portion of the second electrode.