Interface formation between poly(2,5-diheptyl-p-phenylenevinylene) and calcium: implications for light-emitting diodes

P. Dannetun; M. Fahlman; C. Fauquet; K. Kaerijama; Y. Sonoda; R. Lazzaroni; J. L. Brédas; W. R. Salaneck

doi:10.1016/0379-6779(94)90026-4

Interface formation between poly(2,5-diheptyl-p-phenylenevinylene) and calcium: implications for light-emitting diodes

P. Dannetun^*, M. Fahlman, C. Fauquet, K. Kaerijama, Y. Sonoda, R. Lazzaroni, J. L. Brédas, W. R. Salaneck

^*Corresponding author for this work

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

61 Scopus citations

Abstract

The early stages of metal/polymer interface formation between calcium and poly(2,5-diheptyl-p-phenylenevinylene) (PDHPV) have been studied using both X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. Charge transfer is observed from the metal atoms to the polymer; as a result the calcium atoms at the interface are ionic, and negative bipolarons appear as the charge-carrying species on the polymer chains. This n-type doping of PDHPV by calcium leads to the appearance of new electronic states in the polymer bandgap. The calcium atoms appear to diffuse into the near surface region of the polymer, rather than forming a well-defined overlayer on the organic films.

Original language	English (US)
Pages (from-to)	133-136
Number of pages	4
Journal	Synthetic Metals
Volume	67
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(94)90026-4
State	Published - Nov 1994
Externally published	Yes

Keywords

Calcium
Diodes
Interface
Poly(2,5-diheptyl-p-phenylenevinylene)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0379-6779(94)90026-4

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title = "Interface formation between poly(2,5-diheptyl-p-phenylenevinylene) and calcium: implications for light-emitting diodes",

abstract = "The early stages of metal/polymer interface formation between calcium and poly(2,5-diheptyl-p-phenylenevinylene) (PDHPV) have been studied using both X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. Charge transfer is observed from the metal atoms to the polymer; as a result the calcium atoms at the interface are ionic, and negative bipolarons appear as the charge-carrying species on the polymer chains. This n-type doping of PDHPV by calcium leads to the appearance of new electronic states in the polymer bandgap. The calcium atoms appear to diffuse into the near surface region of the polymer, rather than forming a well-defined overlayer on the organic films.",

keywords = "Calcium, Diodes, Interface, Poly(2,5-diheptyl-p-phenylenevinylene)",

author = "P. Dannetun and M. Fahlman and C. Fauquet and K. Kaerijama and Y. Sonoda and R. Lazzaroni and Br{\'e}das, {J. L.} and Salaneck, {W. R.}",

year = "1994",

month = nov,

doi = "10.1016/0379-6779(94)90026-4",

language = "English (US)",

volume = "67",

pages = "133--136",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier",

number = "1-3",

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TY - JOUR

T1 - Interface formation between poly(2,5-diheptyl-p-phenylenevinylene) and calcium

T2 - implications for light-emitting diodes

AU - Dannetun, P.

AU - Fahlman, M.

AU - Fauquet, C.

AU - Kaerijama, K.

AU - Sonoda, Y.

AU - Lazzaroni, R.

AU - Brédas, J. L.

AU - Salaneck, W. R.

PY - 1994/11

Y1 - 1994/11

N2 - The early stages of metal/polymer interface formation between calcium and poly(2,5-diheptyl-p-phenylenevinylene) (PDHPV) have been studied using both X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. Charge transfer is observed from the metal atoms to the polymer; as a result the calcium atoms at the interface are ionic, and negative bipolarons appear as the charge-carrying species on the polymer chains. This n-type doping of PDHPV by calcium leads to the appearance of new electronic states in the polymer bandgap. The calcium atoms appear to diffuse into the near surface region of the polymer, rather than forming a well-defined overlayer on the organic films.

AB - The early stages of metal/polymer interface formation between calcium and poly(2,5-diheptyl-p-phenylenevinylene) (PDHPV) have been studied using both X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. Charge transfer is observed from the metal atoms to the polymer; as a result the calcium atoms at the interface are ionic, and negative bipolarons appear as the charge-carrying species on the polymer chains. This n-type doping of PDHPV by calcium leads to the appearance of new electronic states in the polymer bandgap. The calcium atoms appear to diffuse into the near surface region of the polymer, rather than forming a well-defined overlayer on the organic films.

KW - Calcium

KW - Diodes

KW - Interface

KW - Poly(2,5-diheptyl-p-phenylenevinylene)

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U2 - 10.1016/0379-6779(94)90026-4

DO - 10.1016/0379-6779(94)90026-4

M3 - Article

AN - SCOPUS:0028543222

SN - 0379-6779

VL - 67

SP - 133

EP - 136

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

ER -

Interface formation between poly(2,5-diheptyl-p-phenylenevinylene) and calcium: implications for light-emitting diodes

Abstract

Keywords

ASJC Scopus subject areas

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