Nanoscale probing of charge transport in an organic field-effect transistor at cryogenic temperatures

作者：Nicolet A A L; Kol' chenko M A; Hofmann C; Kozankiewicz B; Orrit M^*

来源：Physical Chemistry Chemical Physics, 2013, 15(12): 4415-4421.

DOI：10.1039/c3cp44072a

We studied charge transport in a field-effect transistor based on an anthracene crystal by single-molecule spectroscopy at cryogenic temperatures. When applying a control voltage to the gate, source and drain electrodes, we observe spectral drifts of the probe molecules%26apos; lines, which follow strongly non-exponential (stretched) kinetics, from seconds to tens of minutes. Applying a gate voltage alone, we find a dependence of the spectral shift as the logarithm of time. When an additional source-drain voltage is applied, the spectral shift follows a power law of time, similar to the elementary step of conduction in amorphous solids, postulated in the continuous-time random walk theory of Scher and Montroll.

• 出版日期2013