Electronic properties of metal-organic interfaces with application to electroluminescent devices

Aparna Rajagopal; Ian Hill; Antoine Kahn

doi:10.1080/10587259808030231

Electronic properties of metal-organic interfaces with application to electroluminescent devices

Aparna Rajagopal, Ian Hill, Antoine Kahn

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

The electronic structure of metal-organic molecular semiconductor interfaces is investigated via photoemission spectroscopy. We measured the energy offsets between the organic molecular levels and the metal Fermi level, which correspond to the charge injection barriers. Chemical reaction and interdiffusion dominate the behavior of metal-on-top contacts. Organic-on-top interfaces are found to be more abrupt. The present data demonstrate that the rule of vacuum level alignment breaks down and that the effect of electronic gap states cannot be neglected at these interfaces.

Original language	English (US)
Pages (from-to)	245-252
Number of pages	8
Journal	Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume	322
DOIs	https://doi.org/10.1080/10587259808030231
State	Published - 1998

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Keywords

Heterojunctions
Interfaces
Metal contacts
Organic molecular solids

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10.1080/10587259808030231

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title = "Electronic properties of metal-organic interfaces with application to electroluminescent devices",

abstract = "The electronic structure of metal-organic molecular semiconductor interfaces is investigated via photoemission spectroscopy. We measured the energy offsets between the organic molecular levels and the metal Fermi level, which correspond to the charge injection barriers. Chemical reaction and interdiffusion dominate the behavior of metal-on-top contacts. Organic-on-top interfaces are found to be more abrupt. The present data demonstrate that the rule of vacuum level alignment breaks down and that the effect of electronic gap states cannot be neglected at these interfaces.",

keywords = "Heterojunctions, Interfaces, Metal contacts, Organic molecular solids",

author = "Aparna Rajagopal and Ian Hill and Antoine Kahn",

note = "Funding Information: Support of this work by the MRSEC program of the National Science Foundation (Grant # DMR-9400362) and by the New Jersey Center for Optoelectronics (Grant # 97-2890-051 -17)i s gratefully acknowledged.",

year = "1998",

doi = "10.1080/10587259808030231",

language = "English (US)",

volume = "322",

pages = "245--252",

journal = "Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals",

issn = "1058-725X",

publisher = "Taylor and Francis Ltd.",

}

TY - JOUR

T1 - Electronic properties of metal-organic interfaces with application to electroluminescent devices

AU - Rajagopal, Aparna

AU - Hill, Ian

AU - Kahn, Antoine

N1 - Funding Information: Support of this work by the MRSEC program of the National Science Foundation (Grant # DMR-9400362) and by the New Jersey Center for Optoelectronics (Grant # 97-2890-051 -17)i s gratefully acknowledged.

PY - 1998

Y1 - 1998

N2 - The electronic structure of metal-organic molecular semiconductor interfaces is investigated via photoemission spectroscopy. We measured the energy offsets between the organic molecular levels and the metal Fermi level, which correspond to the charge injection barriers. Chemical reaction and interdiffusion dominate the behavior of metal-on-top contacts. Organic-on-top interfaces are found to be more abrupt. The present data demonstrate that the rule of vacuum level alignment breaks down and that the effect of electronic gap states cannot be neglected at these interfaces.

AB - The electronic structure of metal-organic molecular semiconductor interfaces is investigated via photoemission spectroscopy. We measured the energy offsets between the organic molecular levels and the metal Fermi level, which correspond to the charge injection barriers. Chemical reaction and interdiffusion dominate the behavior of metal-on-top contacts. Organic-on-top interfaces are found to be more abrupt. The present data demonstrate that the rule of vacuum level alignment breaks down and that the effect of electronic gap states cannot be neglected at these interfaces.

KW - Heterojunctions

KW - Interfaces

KW - Metal contacts

KW - Organic molecular solids

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U2 - 10.1080/10587259808030231

DO - 10.1080/10587259808030231

M3 - Article

AN - SCOPUS:3342947673

SN - 1058-725X

VL - 322

SP - 245

EP - 252

JO - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals

ER -

Electronic properties of metal-organic interfaces with application to electroluminescent devices

Abstract

All Science Journal Classification (ASJC) codes

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