| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
Charge transfer dynamics under interfaces and film environments were investigated using single-molecule spectroscopy as follows:
1) Photoblinking of single perylenediimide dyes in a poly(methylmethacrylate) (PMMA) film was investigated. We examined the bin-time dependencies of the cumulative distribution functions (CDF) of the on-time and off-time durations. The dispersive kinetics of on-time were attributed to radical ion pair ISC in PMMA. A simulation study revealed that the off-time CDF included power-law kinetics of charge hopping in the polymer. 2) Using a scanning MLE-KS method for a photoblinking analysis revealed multiple competitive kinetic processes at the interfaces between an Atto647N dye and TiO2. The injected electron from an excited dye to a trap state in TiO2 migrates due to trap-to-trap hopping, which follows power law kinetics, while the subsequent charge recombination between the oxidized dye and the injected electron follows log-normal kinetics.
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