| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Outline of Final Research Achievements |
In this study, we developed techniques to utilize the current change that occurs when the electron spin is reversed in organic semiconductor devices. We found that the current change in OLEDs is caused by the spin reversal of electron-hole pairs. The electron-hole pairs were found to decrease with increasing voltage, and the EL process was classified into three regions depending on the voltage: the pair accumulation region, the pair dissociation/recombination region, and the non-pair formation region. It was also found that the nature of the electron-hole pairs determines the magnetic field responsivity of the OLEDs. We also investigated the electromotive force generated by ferromagnetic resonance in metal bilayer thin films, and clarified the relationship between the excitation power and the electromotive force due to the resonance.
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