2019 Fiscal Year Annual Research Report
低次元有機・無機ハイブリッドペロブスカイト単結晶の作製と熱電変換特性の計測
| Project/Area Number |
19J10303
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
DUONG THI Mai Huong 大阪大学, 基礎工学研究科, 特別研究員(DC2)
|
|---|
| Project Period (FY) |
2019-04-25 – 2021-03-31
|
| Keywords | hybrid-perovskite / low-dimensional / single crystal / face-shared |
|---|
| Outline of Annual Research Achievements |
I have successed in fabricating single crystal of cm scale of different structures of 1D and 2D hybrid perovskite.
By carefully selecting organic molecules, the formation of hybrid perovskite can be modulated to 2D structure to 1D, including side- shared, face-shared, double -chain, triple-chain. I found the size, shape, and group function of organic modulate the 1D perovskite structure, hydrogen bond in the structure, and optical properties.The crystals exhibited low electrical conductivity.The side shared compounds showed the lowest value which is continuously studied by thermal conductivity and Seebeck coefficient measurement. The compound is predicted to show a high Seebeck coefficient and ultra-low thermal conductivity which is promising for high-efficiency thermoelectric devices.
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The project is going as my expectation. The high quality, centimeter order single crystals of different perovskite structures which achieved, are disposable to study electrical and optical properties.
|
| Strategy for Future Research Activity |
I plan to measure the thermal conductivity by membrane AC calorimetry after some modification. The system shows some advantages in measurement thin films of 2D perovskites. The centimeter order samples which harvested are ready for the measurement. Firstly, thermal conductivity will be established at room temperature. After that, the thermal conductivity as a function of temperature will be conduct to understand contributon of the structure on the thermal conductivity. I also plan to simulate the thermal conductivity of crystal with different structures to confirm the result and understand the experimental results completely. I plan to write a paper that uses the simulated results to explain the experimental results on the thermoelectric measurement.
|
