Can Lattice Models Predict The Density Of States Of Amorphous Organic Semiconductors?
PHYSICAL REVIEW LETTERS(2012)
摘要
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.
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