| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
|---|
| Outline of Final Research Achievements |
In order to improve the thermoelectric figure of merit for a thermoelectric silicon-based clathrate system, an environment-friendly semiconductor system, we investigated the optimization of the silicon-based clathrate system by a codoping approach, and revealed the effect of parameters of codoping, such as combinations of codoping elements and doping level, on the thermoelectric properties for silicon-based clathrate system. We succeeded in improving the thermoelectric performance by a factor of 17 %, compared to previous value, by the codoping approach. Moreover, we investigated in detail the thermal stability in air, oxidation resistance, elastic properties, and mechanical properties, such as the fracture toughness, Vickers hardness, which were not known for silicon-based clathrate system. Consequently, it was found that silicon-based clathrate system had good thermal stability in air, high oxidation resistance, and sufficient mechanical strength for thermoelectric applications.
|
