The Role of the Ionization Potential in Vacuum-Level Alignment at Organic Semiconductor Interfaces

The charge‐injection barriers at interfaces of a pentacene monolayer are investigated. It is found that the charge‐injection barrier depends on the substrate work function. Substrate work functions smaller than the ionization potential of pentacene film have vacuum‐level alignment, whereas for subst...

Full description

Saved in:
Bibliographic Details
Published in:Advanced materials (Weinheim) 2007-03, Vol.19 (5), p.665-668
Main Authors: Fukagawa, H., Kera, S., Kataoka, T., Hosoumi, S., Watanabe, Y., Kudo, K., Ueno, N.
Format: Article
Language:English
Subjects:
Electronics
Interfaces
Organic semiconductors
Pentacenes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The charge‐injection barriers at interfaces of a pentacene monolayer are investigated. It is found that the charge‐injection barrier depends on the substrate work function. Substrate work functions smaller than the ionization potential of pentacene film have vacuum‐level alignment, whereas for substrate work functions exceeding the ionization potential of pentacene film, the HOMO of the pentacene film is pinned to near the Fermi level of the substrate (see figure).
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200601678