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Doping-induced realignment of molecular levels at organic–organic heterojunctions

Authors
Journal
Chemical Physics
0301-0104
Publisher
Elsevier
Publication Date
Volume
325
Issue
1
Identifiers
DOI: 10.1016/j.chemphys.2005.09.015
Keywords
  • Organic Semiconductors
  • Heterojunctions
  • Molecular Level Alignment
  • Charge Neutrality Level

Abstract

Abstract This article examines how the concept of alignment of charge neutrality levels (CNL) can be used to explain and predict interface dipole and molecular level offset at organic–organic (OO) heterojunctions. The application of the model of CNL alignment to interfaces between undoped materials is reviewed first. The model is then extended to explain the shift of the CNL upon electrical doping of an organic material, and the resulting change in interface dipole and molecular level alignment. This approach provides, at this point, the first comprehensive prediction of energetics at OO heterojunctions.

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