成果報告書詳細
管理番号20160000000853
タイトル*平成27年度中間年報 「高性能・高信頼性太陽光発電の発電コスト低減技術開発/革新的新構造太陽電池の研究開発/ペロブスカイト系革新的低製造コスト太陽電池の研究開発(低コストR2R太陽電池製造技術の開発)」
公開日2016/11/18
報告書年度2015 - 2015
委託先名積水化学工業株式会社
プロジェクト番号P15003
部署名新エネルギー部
和文要約
英文要約Development of high performance and reliable PV modules to reduce levelized cost of energy/ Research and Development of innovative new structure solar cells/ Development of perovskite-type innovative solar cells with low production cost (Low-cost R2R production technologies) (FY2015-FY2017) FY2015 Annual Report

This study aims to improve efficiency and endurance of solar cells for reducing costs, specifically, \7/kwh power generation costs, \15/W manufacturing costs and 15% module efficiency.
The R2R process technology based on our original barrier technology and specific materials has been developed for outdoor durability (over 10 years) .
And we have perspective that this study makes the relative falling rate of 5cm2 sized ultra‐lightweight modules with 17% conversion efficiency to achieve 10%. In this term, the mechanism of degradation by heat resistance test and moist heat resistance tests was studied, and the necessary conditions which can resolve those causes were defined. We prepared the facility for designing of the manufacturing process.
First of all, the problems were identified with using our existing die coater. And the method of application was chosen. The roll-to-roll printing machine was introduced for the development of printing technology for the perovskite solar cells.

In this term, we have been conducting the following 4 parts on our plan,
1)heat resistance, 2)moist heat resistance, 3) reducing heat treatment temperatures, 4)coating process.
1) Heat resistance: We defined hole transport layers influenced lower conversion efficiency. The hole transport layers were improved. This novel hole transport layer provided >10% falling rate of conversion efficiency at 90℃ for 1000 hours.
2) Moist heat resistance: We achieved under 20% falling rate of conversion efficiency at 85℃,85% humidity in 1000 hours by avoiding infiltration water from perovskite layer. This proved water affects the degradation of perovskite solar cells and suggests the possibility of the outdoor installation by preventing the ingress of water.
3) Reducing heat treatment temperatures: We have been able to achieve the 200℃ of baking the TiO2 paste as remaining highly efficient of those which is baked at usual 550℃. This proved that also porous type of perovskite solar cell can be prepared at lower temperature and suggests the possibility for using substrates which have temperature restriction such as plastic films.
4) Coating process: A vacuum dye coater as R2R coating equipment for perovskite solar cells was applied. We could obtain the fine TiO2 layer (several hundred nano meters thickness) without any stripes or uneven area which are drawn by 3m/min (coating speed) on the flexible substrates (PET).
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