| Project/Area Number |
25620040
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Inorganic chemistry
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
ISHIWATA Shintaro 東京大学, 工学(系)研究科(研究院), 准教授 (00525355)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SAKAI Hiswaki 東京大学, 大学院工学系研究科, 助教 (20534598)
|
|---|
| Project Period (FY) |
2013-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
|
|---|
| Keywords | 熱電変換 / 層状遷移金属カルコゲナイド / ゼーベック効果 / 超イオン伝導 / 半金属 / 層状カルコゲナイド / ドメイン観察 |
|---|
| Outline of Final Research Achievements |
To search for a high-performance thermoelectric material showing low thermal conductivity as low as a glass in addition to high electronic conductivity, we studied the effect of controlling domain on thermoelectric properties and synthesized new compounds of layered transition-metal chalcogenides. First, we found that a polycrystalline sample of CuAgSe with superionic conductivity shows an enhanced power factor at low temperatures below 200 K by enlarging the size of domains. Second, we examined Nb-doping effect on 1T-MoTe2, which is known as a high-mobility semimetal, and found that the 10%-doped sample shows an improved figure of merit (ZT~0.02) at room temperature and that the 60%-doped sample crystallizes in new 3R polytype without inversion symmetry.
|
