| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| 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.
|
