| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Because of their ability to convert temperature difference and electricity, thermoelectric materials are used as cooling or power-generation devices. However, substutute materials are under search, because of the toxicity and rareness of the constituent elements of the current thermoelectric materials. In this study, we developed calculation methods to evaluate if the electronic structure and the phonon structure of the material are promising enough to satisfy the target values for conversion efficiency and thermal resistivity. We carried out such calculations over 500 compounds, to reveal the characteristics of compounds with high efficiency and high thermal resistivity. Some compounds found during the study were synthesized and evaluated. We found that MgSrSi-type compounds and tin sulfides inckuding SnS and Sn2S3 are promising candidate thermoelectric materials with extremely low thermal conductivity.
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