| Project/Area Number |
26420267
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Saitama University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 有機薄膜太陽電池 / 静電塗布法 / 溶媒蒸発時間 / 分子配向 / ナノファイバー / グラデーション / ラマンスペクトル / 結晶子サイズ / グラデーション構造 / 結晶化 / マルチノズル / 酸化亜鉛ナノファイバー / 結晶性 |
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| Outline of Final Research Achievements |
In this research, we investigated the fabrication technique of ZnO nanofiber, controlled p-n ratio in a depth direction, and the controlling method of solvent evaporation time for realizing the high photovoltaic performance. The diameter of 30 nm was successfully achieved by optimizing molecular weight and concentration of PVP in ZnO precursor solution. In addition, the p-n ratio can be controlled by adding the pulsed voltage for the electrospray deposition method. Here, the each solutions were sprayed alternately, resulting in the blended films with different concentrations. Finally, the solvent evaporation time of droplet is found to affect the polymer orientation in the thin film, which results in the improved photovoltaic performance. As a result, the highest photoconversion efficiency of 8.6% was achieved by the electrospray deposition method.
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