成果報告書詳細
管理番号20160000000362
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(基盤材料技術と性能評価技術の開発)」
公開日2016/12/13
報告書年度2015 - 2015
委託先名学校法人早稲田大学
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 fundamental materials and evaluation)
(FY2015-2017) FY2015 Annual Report

Alternative to the well-studied Spiro-OMeTAD, the primary target of Waseda Univ. focused on the development of robust and low cost hole-transporting materials. More than 10 arylamine polymers have designed and synthesized, which exhibited high hole-transporting property without oxidant doping. Poly(tolylarylamine) (PTAA) has been recently reported as alternatives, and commercially available but expensive. We applied oxidative polymerization as a facile and low cost preparation method. Each monomer was prepared by one or two step synthesis, and we established the scale-up synthesis including monomer purification. The corresponding polymers were amorphous and a uniform polymer layer was easily formed by solution-process. HOMO energy levels of the obtained layer ranged within -5.2~ -5.6 eV tunable with the electron-donating/withdrawing groups. The estimated cost for the synthesis was 120-190 yen/m2, which merited the milestone cost (250 yen/m2). The regular mesoscopic structured device was fabricated with the hole-transporting layer of dimethoxy-substiuted polyarylamine 1 (HOMO level -5.2 eV), which resulted in the 14% PCEs. In NIMS, three device architectures for perovskite solar cell, including regular planar structure, regular mesoscopic structure and inverted planar structure was compared. The photocurrent of the regular structured devices were found unstable under continuous light soaking. In contrast, the inverted structured devices showed a constant photocurrent during the light soaking, indicating higher photo-stability. By optimizing the film composition, crystallinity and morphology of both perovskite and charge transporting layers, the device performance and stability were largely improved. A remarkable PCE of 18.21% (certified by AIST) has been recently achieved based on cells with an aperture area of 1.022 cm2, which is among the highest certified efficiencies to date among all thin film solar cells. KAST focused on the development of reliable performance evaluation method of the cell. A special test chamber, and a specialized source meter was developed to analyze 12 channels of the device simultaneously, and applied for a patent.
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