Title :
Charge Transport in Organic Transistors Accounting for a Wide Distribution of Carrier Energies—Part I: Theory
Author :
Torricelli, Fabrizio
Author_Institution :
Dept. of Electr. Eng., Eindhoven Univ. of Technol., Eindhoven, Netherlands
fDate :
5/1/2012 12:00:00 AM
Abstract :
An extended theory of carrier hopping transport in organic transistors is proposed. According to many experimental studies, the density of localized states in organic thin-film transistors can be described by a double-exponential function. In this work, using a percolation model of hopping, the analytical expressions of conductivity and mobility as functions of temperature and charge concentration are obtained. The conductivity depends only on the tail states, while the mobility is determined by the total charge carriers in the semiconductor.
Keywords :
organic field effect transistors; semiconductor device models; carrier energy; carrier hopping transport; charge transport; double-exponential function; organic thin-film transistors; percolation model; tail states; Charge carriers; Conductivity; Neodymium; Niobium; Organic thin film transistors; Density of states (DOS); organic thin-film transistor (OTFT); percolation theory; variable range hopping;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2012.2187830