Open AccessTechniques for characterization of charge carrier mobility in organic semiconductors
Author(s) -
Kokil Akshay,
Yang Ke,
Kumar Jayant
Publication year - 2012
Publication title -
journal of polymer science part b: polymer physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.65
H-Index - 145
eISSN - 1099-0488
pISSN - 0887-6266
DOI - 10.1002/polb.23103
Subject(s) - organic semiconductor , charge carrier , semiconductor , characterization (materials science) , materials science , optoelectronics , diode , electron mobility , transistor , field effect transistor , charge (physics) , space charge , semiconductor device , dielectric spectroscopy , nanotechnology , voltage , chemistry , electrical engineering , physics , electrode , electrochemistry , engineering , quantum mechanics , electron , layer (electronics)
The charge transport characteristics of organic semiconductors are one of the key attributes that impacts the performance of organic electronic and optoelectronic devices in which they are utilized. For improved performance in organic photovoltaic cells, light‐emitting diodes, and field‐effect transistors (FETs), efficient transport of the charge carriers within the organic semiconductor is especially critical. Characterization of charge transport in these organic semiconductors is important both from scientific and technological perspectives. In this review, we shall mainly discuss the techniques for measuring the charge carrier mobility and not the theoretical underpinnings of the mechanism of charge transport. Mobility measurements in organic semiconductors and particularly in conjugated polymers, using space‐charge‐limited current, time of flight, carrier extraction by linearly increasing voltage, double injection, FETs, and impedance spectroscopy are discussed. The relative merits, as well as limitations for each of these techniques are reviewed. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012