Visualization of Carrier Motion in Organic Films as Dielectric Polarization Phenomena Using Maxell-Displacement Current and Optical Second Harmonic Generation

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By probing dielectric polarization phenomena induced by dipoles and electrons, we can visualize and model carrier motion in organic materials and in devices. Maxwell‐displacement‐current (MDC) method is available for directly probing orientational dipolar motion in organic monolayes. On the other hand, electric field induced optical second harmonic generation (EFISHG) method Allows us to directly probe moving electrons (and holes). Basic concept of these two methods is described. Finally, it is stressed that experiments and analyses based on dielectrics physics is a very effective way for modeling carrier motions in organic monolayers as well as in organic devices.