2019 Fiscal Year Annual Research Report
Physical understanding of defects in organometal halide perovskite
| Project/Area Number |
17K05033
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| Research Institution | Nara Institute of Science and Technology |
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Principal Investigator |
JUNG MINCHERL 奈良先端科学技術大学院大学, 先端科学技術研究科, 特任助教 (40632071)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | hybrid perovskite / thin film / THz-wave absorption / phonon mode / interface / intermixed state |
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| Outline of Annual Research Achievements |
We performed the below;
1) The phono mode study to find a new physical property in the hybrid perovskite thin film
- We tried to exactly know a structure/state of the molecular defect (CH3NH2) and its effect. We found a significant THz-wave absorption property firstly which is due to the molecular defect-incorporated hybrid perovskite. Also, we understood that the partial defect structure could make a different phonon mode.
2) The interface study between the polymer protection layer and hybrid perovskite thin film
- We tried to find a good protection layer in polymer materials with ultra-thin (< 10 nm) and minimized interface region (no intermixed state). We found the P3 polymer can be a good protection layer with a 7 nm-thick, no intermixed state, and no penetrating.
Finally, we confirmed the new physical property (THz-wave absorption in the range of 0.5~2.5 THz) with the defect incorporated structure and found the enough protection polymer layer. We believe these results will be a seed for the next step to realize a THz-based application using organic-inorganic hybrid perovskite materials.
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