Pentacene homojunctions: Electron and hole transport properties and related photovoltaic responses
- 28 May 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 77 (19), 195212
- https://doi.org/10.1103/physrevb.77.195212
Abstract
We report on organic homojunctions composed of differently doped vacuum-deposited pentacene layers. We observe a remarkably high built-in voltage of 1.65 V. An analysis of the current-voltage characteristics under dark and illuminated conditions reveals that the open-circuit voltage is directly related to the built-in voltage and that the recombination process is influenced by the distinct charge transport properties of electrons and holes in the pentacene film. By a comparison with and single-carrier homojunctions, deep trap states located around 0.63 eV below the electron transport level are shown to influence the properties.
Keywords
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