2011 Fiscal Year Final Research Report
Control of Photovoltaic Devices based on Interfacial Charge-Transfer Transitions between Metal Oxide Semiconductor and Organic Molecules
| Project/Area Number |
22750120
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Functional materials chemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Keywords | 光電変換 / 有機系太陽電池 / 酸化チタン / 電子受容体 / TCNQ / 電荷移動遷移 / 界面錯体 |
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| Research Abstract |
Novel organic solar cells based on the surface complexes of TiO_2 and dicyanomethylene compounds(TCNX). were studied to improve the energy conversion efficiency. By introducing four methyl groups being an electron-donating group to TCNQ, the light absorption region could be extended to the near IR region around 900nm. Furthermore, by using alkanediol as a coadsorbent the short-circuit photocurrent density was enhanced to ca. 15mA/cm^2. In addition, by adding guanidinium ions to the electrolyte, the open-circuit voltage was increased. By this research, the energy conversion efficiency was improved to ca. 3. 5%.
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