| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
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| Outline of Final Research Achievements |
In this study, we found that the introduction of rare earth ions into lead halide perovskite thin film nanocrystals enables multi-exciton generation by utilizing the excess energy upon photoexcitation.
It was also found that the luminescence quantum yield of rare earths exceeds 1 by excitation at photon energies above the energy gap of perovskite.
On the other hand, the internal quantum yields of the rare earths were found to vary depending on the lattice distortion of the perovskite matrix crystal. The luminescence quantum yield was improved by reducing the lattice distortion of the crystal. In the future, it is expected to be developed into a high-efficiency solar cell with low thermal energy loss by improving the exciton energy extraction.
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