Can lattice models predict the density of states of amorphous organic semiconductors?

F. May, B. Baumeier, C. Lennartz, D. Andrienko

Research output: Contribution to journalArticleAcademicpeer-review

45 Citations (Scopus)

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 languageEnglish
Article number136401
JournalPhysical Review Letters
Volume109
Issue number13
DOIs
Publication statusPublished - 25 Sep 2012
Externally publishedYes

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