Development of Microscopic Analysis Method of Organic Solar Cells
| Project/Area Number |
15H02023
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥42,120,000 (Direct Cost: ¥32,400,000、Indirect Cost: ¥9,720,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2015: ¥23,140,000 (Direct Cost: ¥17,800,000、Indirect Cost: ¥5,340,000)
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| Keywords | 走査プローブ顕微鏡 / 太陽電池 / 走査トンネル顕微鏡 / 有機太陽電池 / 有機LED / 有機薄膜太陽電池 / 光電変換 |
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| Outline of Final Research Achievements |
A microscopic measurement technique that can visualize the nanometer-scale distribution of local conversion performance in highly non-uniform organic solar cell devices was developed, where a scanning tunneling microscope (STM) is used to locally collect the photocarriers that were generated in an illuminated solar cell. The developed technique, light-modulated STM (LM-STM) allows us to acquire local I-V characteristics of solar cells as well as their illumination intensity dependence. It was pointed out that, compared to the macroscopic device I-V characteristics, the acquired local I-V characteristics are generally much more strongly affected by the inner resistance of the device materials and a guideline how to extract the local carrier generation rate and photovoltage from such local I-V characteristics is given. A new type of pulse-laser-assisted time-resolved STM system was developed to measure the local carrier life time in a solar cell device.
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| Academic Significance and Societal Importance of the Research Achievements |
製造の省力化・省コスト化のため、最新の太陽電池はアモルファスや多結晶のような不均一構造を持つことが多く、デバイス内には高性能な部分と低性能な部分とが混在している。局所性能を測定可能な顕微鏡はそのような複雑なデバイスの動作を理解し、さらなる高効率化を目指すために特に有用である。本研究は光変調トンネル分光法により局所性能を評価可能であることを示しただけでなく、得られる結果をどのように解釈すれば局所性能を決める重要な物理パラメータを取り出せるかという指標を与えるものである。また光キャリア寿命という別のパラメータを計測するための時間分解トンネル顕微鏡の開発も行った。
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Report
(5 results)
Research Products
(30 results)
