2015 Fiscal Year Final Research Report
Solid-state NMR analysis of bulk-heterojunction structures for organic solar cells with high conversion efficiency
| Project/Area Number |
26870317
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Device related chemistry
Energy-related chemistry
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 有機太陽電池 / 固体核磁気共鳴法 / ドナー・アクセプター混合状態 / ベルクヘテロ構造 |
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| Outline of Final Research Achievements |
For bulk heterojunction-type organic solar cells (BHJ-OSCs), donor-acceptor (D-A) structures in an active layer are considered to have an impact on photoelectric conversion characteristics. In this study, we investigated on the D-A structures consisting of oligomer-type material (DTS(FBTTh2)2) and PC71BM system, which are solution-processible materials and are suitable for the realization of low-cost energy device, to understand the characteristics by spectroscopic techniques such as ultraviolet-visible spectra, photoluminescence emission spectra, and solid-state NMR measurements. The power conversion efficiencies of BHJ-OSCs increase from 1.9% to 6.0% by the investigation of fabrication processes. Structural analyses reveal developments of ordering on DTS(FBTTh2)2 and phase-separated heterojunction structure on the order of several tens of nanometers by adding 1,8-diiodooctane of 0.4 vol% to solvents.
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| Free Research Field |
材料化学
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