2016 Fiscal Year Final Research Report
Investigation of organic semiconductor/inorganic semiconductor heterojunctions and organic semiconductor heterojunctions
Project/Area Number |
26420283
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Electronic materials/Electric materials
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Research Institution | Osaka Electro-Communication University |
Principal Investigator |
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Keywords | 有機薄膜太陽電池 / 有機/無機半導体ヘテロ接合 / バルクへテロ接合 / 接合特性 |
Outline of Final Research Achievements |
We investigated the relationship between junction properties and solar-cell properties in inverse-type bulk-heterojunction (P3HT/PCBM) organic solar cells. It is found that the open-circuit voltage (VOC) increased with light-exposed time. In order to understand this increment of VOC, the built-in potential (VB) in the bulk-heterojunction was estimated from the frequency dependence of its impedance. It is found that VOC is proportional to VB. Next, we fabricated P3HT/n-type crystalline silicon (n c-Si) heterojunctions, which are expected to be a high-efficiency simple-structure solar cell. We investigated the junction properties. In the current-voltage characteristics, the P3HT/n c-Si heterojunctions exhibited a rectifying property. At high frequency (200 kHz), the capacitance of the heterojunction using high-resistive n c-Si depended on applied voltage, while that using low-resistive n c-Si did not depend. We have been making a model to explain this experimental result.
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Free Research Field |
半導体工学と半導体デバイス
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