| Budget Amount *help |
¥41,600,000 (Direct Cost: ¥32,000,000、Indirect Cost: ¥9,600,000)
Fiscal Year 2020: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2019: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2018: ¥23,790,000 (Direct Cost: ¥18,300,000、Indirect Cost: ¥5,490,000)
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| Outline of Final Research Achievements |
Semiconductor nanoparticles (quantum dots) having a size of 10 nm or less exhibit emission characteristics and quantum size effects that bulk semiconductors do not have. So far, however, all high-performance quantum dots have been cadmium compounds. We have succeeded in synthesizing cadmium-free quantum dots by replacing the cadmium element with multiple low-toxic elements. However, its characteristics are not sufficient because it emits photoluminescence from defect sites that is spectrally broad. In this research, by constructing a core-shell structure in which the surface of a quantum dot is coated with another type of semiconductor, it is dramatically transformed into a quantum dot that exhibits sharp band-edge emission. Furthermore, the quantum dots are improved in practicality by developing new core-shell technologies.
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