Abstract
We extend existing lattice models of small-molecule amorphous semiconductors by accounting for changes in molecular polarizability upon charging or excitation. A compact expression of this contribution to the density of states is provided. Although the lattice model and the description based on a microscopic morphology both qualitatively predict an additional broadening, shift, and an exponential tail (traps) of the density of states, a quantitative agreement between the two cannot be achieved.
Original language | English |
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Article number | 136401 |
Journal | Physical Review Letters |
Volume | 109 |
Issue number | 13 |
DOIs | |
Publication status | Published - 25 Sep 2012 |
Externally published | Yes |