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Off-time distribution for ensembles of terrylene molecules in two different polymer matrices with dielectric constants of 2.53 (PS) and 14 (PVA). The solid lines indicate the best fits to power laws with exponents 1.7 (PS) and 1.2 (PVA).
Distributions and of on and off times for one individual terrylene molecule in a PS matrix. The solid lines represent the best power law fits with exponents 1.7 (off) and 2.3 (on). The dashed line indicates the best fit to a single exponential function for the on-time distribution.
Simplified molecular level scheme. The dark state comprises the positively charged molecule and the electron trapped within a manifold of states provided by the disordered matrix.
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