| Project/Area Number |
19J10303
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Review Section |
Basic Section 29010:Applied physical properties-related
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| Research Institution | Osaka University |
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Principal Investigator |
DUONG THI Mai Huong 大阪大学, 基礎工学研究科, 特別研究員(DC2)
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| Project Period (FY) |
2019-04-25 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2020: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2019: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Self trapped exciton / 1D hybrid perovskite / single crystal / broadband emission / hybrid-perovskite / low-dimensional / face-shared |
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| Outline of Research at the Start |
I plan to examine the 2D crystals which we succeeded in measurement of heat conductivity of thin films by a membrane AC calorimetry method. I will understand how to improve the membrane AC calorimetry method for crystals.
I will measure other crystals to have a primitive understanding about relationship between perovskites structures and heat conductivity.
I will modify structure of the 1D and 2D perovskites for thermoelectric devices. I will use the simulation to confirm the experiment results and delight a principle in designer of structure for high-performance thermoelectric devices.
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| Outline of Annual Research Achievements |
Self trapped exciton (STEs) are widely assigned for broadband emissions in low-dimensional hybrid perovskite which promises application potential in white LED light conversion devices. Two models have been proposed for broadband emission in hybrid perovskite. The role of the organic molecules in the absorption-emission process and the effect of the inorganic framework on the emission mechanism remains unclear. One of the effective ways to understand the influence of organic molecule and inorganic part in the STEs phenomenon is to exam the optical properties of various structures based on different molecules. Single crystals of various 1D hybrid perovskite structures are good candidates for examining STEs to illuminate the roles of organic molecules and structure in the generation of STEs. In this work, the photoluminescence (PL) and time-resolved PL spectra of the four lead iodide 1D compounds were studied. The compounds exhibited a broadband emission with a large Stokes shift assigned to STE in the organic molecules following the model I. At low temperatures, compound 1DI-4McPy exhibited two broadband emissions at 2.36 and 1.73 eV which would be assigned to STEs arising from distortion in the inorganic chain and organic part, respectively. These results are a good foundation for further investigation into the absorption and emission mechanisms of 1D hybrid perovskite.
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| Research Progress Status |
令和2年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和2年度が最終年度であるため、記入しない。
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