成果報告書詳細
管理番号20160000000361
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(高性能材料合成技術の開発)」
公開日2016/12/13
報告書年度2015 - 2015
委託先名富士フイルム株式会社
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Title: 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 (Technologies for synthesis of high-performance materials)
(FY2015-2017) FY2015 Annual Report

We have successfully obtained the criteria for designing hole-transporting materials and perovskite materials, which enable to improve moisture-resitance of perovskite solar cells. 1) Development of hole-transporting materials (HTM) : We assumed one of the causes of low moisture-resistant property of the perovskite solar cell (PSC) using spiro-MeOTAD, which is commonly used HTM, is the hydrophilicity of the dopants in it. In order to solve this problem, we have investigated HTMs exhibiting satisfactory power generating properties without dopants in it. As a result of an investigation, we found the hole-transporting material of HTM-F3, which exhibited improved moisture-resistance (the efficiency maintenance factor in 1.6 times a PSC with spiro-MeOTAD, @45℃, 85%RH, 96H) and relatively good photoelectric conversion efficiency. This result revealed that using HTM without dopants is effective for improving moisture-resistant property. Furthermore, we have also developed new HTMs with deeper HOMO level (HTM-F5, HTM-F6, and HTM-T2). By using these HTMs, PSCs with improved photoelectric conversion efficiencies have been obtained. 2) Perovskite materials : In order to improve moisture-resistance of PSC, we have applied the hydrophobic cation species into the perovskite materials. A mixing amount of the hydrophobic cation species should be suppressed to smaller amount in order not to lose their light absorption properties. As a result of our investigation based on contact-angle values of the materials, we found a new material, P-RA11. Its moisture-resistance properties are improved 1.5 times the properties of material without hydrophobic cation species. On the other hand, initial values of photoelectric conversion efficiency were deteriorated by mixing the hydrophobic cation species. Further analysis revealed that the particle size of the perovskite materials changed by mixing hydrophobic cation species. We estimate that the particle size change is the cause of degradation in initial values of photoelectric conversion efficiency. Our improvements from both aspects of manufacturing process and materials are in progress.
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