| Tartalom: |
http://real.mtak.hu/6097/ |
| Archívum: |
MTA Könyvtár |
| Gyűjtemény: |
Status = Published
Type = Article
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| Cím: |
Self-assembled monolayers as interfaces for organic opto-electronic devices
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| Létrehozó: |
Zuppiroli, L.
Si-Ahmed, L.
Kamarás, Katalin
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| Kiadó: |
EDP Sciences
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| Dátum: |
1999
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| Téma: |
QC Physics / fizika
QC06 Physics of condensed matter / szilárdtestfizika
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| Tartalmi leírás: |
Charge injection into an organic semiconductor can be improved by using
a self-assembled monolayer of functionalized molecules grafted on the
electrode. This new interface can be designed in order to reduce the
Schottky barrier between the conductive electrode and the organic
semiconductor. The polarizability of the molecules involved can also be
chosen in order to increase the adhesion of the molecular semiconductor
onto the electrode. We present Kelvin Probe experiments and saturated
photovoltage measurements performed on a number of such derivatized
electrodes. They permit a quantitative description of the potential
shifts due to the self-assembled monolayers which are related to the
electrical dipoles of the individual molecules constituting them. When
conjugated sites contributing to the band states of the organic
semiconductor are placed too close to the electrode in the negative
part of the image-force potential, two new effects unfavorable to
charge injection can appear. We demonstrate that it is convenient to
separate the attachment group of the molecule from the conjugated core
by a spacer of non-conjugated sites in order to reduce these
undesirable effects.
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| Típus: |
Article
PeerReviewed
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| Formátum: |
text
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| Azonosító: |
Zuppiroli, L. and Si-Ahmed, L. and Kamarás, Katalin (1999) Self-assembled monolayers as interfaces for organic opto-electronic devices. EUROPEAN PHYSICAL JOURNAL B, 11 (3). pp. 505-512. ISSN 1434-6028
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