Determination of carrier mobility in disordered organics from current-voltage characteristics

Wu, Y. Z.; Zhang, C. R.; Zhang, D. J.
July 2009
Applied Physics Letters;7/20/2009, Vol. 95 Issue 3, p033508
Academic Journal
Electrical field dependent charge carrier mobility of organics was determined by introducing a useful function transformed from simple current-voltage characteristics in an electron-only device. The calculated mobility is consistent with the Poole–Frenkel form for the electrical field between 400 and 1100 V1/2 cm-1/2. The electrical field and carrier distributions in the device were also obtained from the newly introduced function to exhibit behaviors of xα and 1/x1-α (α∼0.15–0.25, for current density from 20 to 500 mA cm-2, x>6 nm, is the distance from cathode), respectively.


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