成果報告書詳細
管理番号20140000000700
タイトル*平成25年度中間年報 太陽エネルギー技術研究開発 太陽光発電システム次世代高性能技術の開発 極限シリコン結晶太陽電池の研究開発(次世代超薄型高効率結晶シリコン太陽電池)
公開日2015/1/31
報告書年度2013 - 2013
委託先名京セラ株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約
英文要約Title: High Performance PV Generation System for the Future. R and D on Ultimate Wafer-based Si Solar Cells. (super thin high efficiency crystal silicon photovoltaic) (FY2010 to FY2014) FY2013 annual report

[Objective in FY 2013] We aim to achieve crystalline silicon photovoltaic cell conversion efficiency 20%, module conversion efficiency 18%. (1)policy of research and development; We have to reduce the photovoltaic power generation cost to 7YEN/kWh to realize the road map of photovoltaic power generation cost for 2030. In the development of super-thin high efficiency photovoltaic process, we aim to achieve the high conversion efficiency of the world's best level by using the super thin wafer and achieving the technical development about electrode formation technology, new light trapping technology, effective passivation technology, p-n junction formation technology and back-contact structure with low cost process. 1. high efficiency technology development: (FY2010-FY2014 policies) We perform the development for the technology to reduce the cell-warp which is the problem with the BSF layer formation method by using the conventional aluminum paste and to achieve the technical development about electrode formation technology, new light trapping technology with low cost process (dry/wet and laser), effective passivation technology, p-n junction formation technology and back-contacted structure. Furthermore, we develop the new structure and process to achieve the low surface recombination velocity with super thin cell. (FY2013 policy) Kyocera develops high-volume production process engineering based on our studies in FY2010-2012. Kyocera has developed high-quality poly-crystalline silicon ingot obtained by leading-edge technology of crystal growth and also high output solar cell done by latest technology. Kyocera develops low cost process, high productivity process and large area cell process for high-volume production. 2. Evaluation of materials provided from the sub-theme for research and development of the low cost poly silicon raw materials and quasi-mono crystalline silicon wafer: (FY2013 policy)As a sub theme, Kyocera tries to produce cells from several kinds of mono or polycrystalline silicon wafers which are consisted from floating cast growth method, low cost EMC poly-crystalline growth method and other low cost monocrystalline silicon growth method. We evaluate such materials by our standard cell process. (2)FY2013 results; 1. High efficiency technology development: As a result of the year, we reached conclusion that conversion efficiency of mono-crystalline silicon solar cell was related with the rear surface recombination velocity of solar cell, fixed charge density and interface state density. We got the following result in this fiscal year. Jsc = 38.53mA/cm2, Voc = 0.656V, FF = 0.792, Eff = 20.0% Cell-size 244cm2 using 180 micron thick mono-crystalline silicon wafer with standard cell structure (non back-contacted structure). In FY2014, we develop passivation technology, high-quality crystal growth technology, and electrical road and P/N junction process engineering. Also we study low cost process, high productivity process and large area cell process for high-volume production. And in order to put on market, we evaluate mass-production engineering,too. 2. Evaluation of the materials provided from the sub-theme for research and development for low cost poly silicon raw material and quasi-mono crystalline silicon wafer: There are no results for the evaluation because they were no offered.
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