14:15 〜 14:30
▼ [12p-N302-4] Localization/Delocalization of Charge Carrier in Organic Semiconductor via Temperature Dependent-Electronic Polarization Energy
キーワード：low energy inverse photoelectron spectroscopy, charge carrier localization/delocalization, temperature dependence electronic polarization
The behavior of the charge carrier in organic semiconductor (OSC) has been an open question for decades. In most cases, charge carrier is thought to be localized on a single molecule and incoherently transported by the hopping mechanism. However, in OSCs with high charge carrier mobility, the charge carrier delocalizes and is coherently transported by the band-like mechanism.
Here, we determined the charge carrier radius through the lens of electronic polarization C60, CuPc, and pentacene. We found that all of the charge carriers localized around a single molecule. Furthermore, by changing the temperature, C60, CuPc, and flat-lying pentacene show an incoherent hopping transport while pentacene in its thin-film phase, shows a band-like transport. Thus, we concluded that, by judging from the electronic polarization, the charge is localized in a single molecule and the localized charge also has a tendency to transport coherently.
Here, we determined the charge carrier radius through the lens of electronic polarization C60, CuPc, and pentacene. We found that all of the charge carriers localized around a single molecule. Furthermore, by changing the temperature, C60, CuPc, and flat-lying pentacene show an incoherent hopping transport while pentacene in its thin-film phase, shows a band-like transport. Thus, we concluded that, by judging from the electronic polarization, the charge is localized in a single molecule and the localized charge also has a tendency to transport coherently.