Molecular order, charge injection efficiency and the role of intramolecular polar bonds at organic/organic heterointerfaces

Y. Wang, Toshinori Matsusima, H. Murata, A. Fleurence, Y. Yamada-Takamura, R. Friedlein

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The effect of orientational changes in thin films of the non-crystalline hole transport material α-N-N′-diphenyl N-N″-bis(1 naphthayl)-1,1′-biphenyl-4,4′-diamine (α-NPD) on the energy level alignment and the film electronic structure has been investigated by angle-resolved ultraviolet photoelectron spectroscopy and related to the transport characteristics of hole-only devices. Changes in the anisotropic α-sexithiophene (α-6T) substrate from a "standing" to a "flat" molecular orientation induced by mechanical rubbing lead to molecular order and a preferential orientation in subsequently deposited thin α-NPD films and cause a reduction of the charge injection barrier at the organic/organic interface. The results show that the height of this barrier is determined by the surface dipoles of the individual organic films that relate to the orientation of intramolecular polar bonds at the interface.

Original languageEnglish
Pages (from-to)1853-1858
Number of pages6
JournalOrganic Electronics
Volume13
Issue number10
DOIs
Publication statusPublished - Jan 1 2012

Fingerprint

Charge injection
Ultraviolet photoelectron spectroscopy
injection
Thin films
Diamines
Molecular orientation
Electron energy levels
Electronic structure
ultraviolet spectroscopy
diamines
thin films
Substrates
energy levels
alignment
photoelectron spectroscopy
dipoles
electronic structure
causes
diphenyl
neodymium pyrocatechin disulfonate

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Molecular order, charge injection efficiency and the role of intramolecular polar bonds at organic/organic heterointerfaces. / Wang, Y.; Matsusima, Toshinori; Murata, H.; Fleurence, A.; Yamada-Takamura, Y.; Friedlein, R.

In: Organic Electronics, Vol. 13, No. 10, 01.01.2012, p. 1853-1858.

Research output: Contribution to journalArticle

Wang, Y. ; Matsusima, Toshinori ; Murata, H. ; Fleurence, A. ; Yamada-Takamura, Y. ; Friedlein, R. / Molecular order, charge injection efficiency and the role of intramolecular polar bonds at organic/organic heterointerfaces. In: Organic Electronics. 2012 ; Vol. 13, No. 10. pp. 1853-1858.
@article{0fadaeb411764c40996abdc7857c00ff,
title = "Molecular order, charge injection efficiency and the role of intramolecular polar bonds at organic/organic heterointerfaces",
abstract = "The effect of orientational changes in thin films of the non-crystalline hole transport material α-N-N′-diphenyl N-N″-bis(1 naphthayl)-1,1′-biphenyl-4,4′-diamine (α-NPD) on the energy level alignment and the film electronic structure has been investigated by angle-resolved ultraviolet photoelectron spectroscopy and related to the transport characteristics of hole-only devices. Changes in the anisotropic α-sexithiophene (α-6T) substrate from a {"}standing{"} to a {"}flat{"} molecular orientation induced by mechanical rubbing lead to molecular order and a preferential orientation in subsequently deposited thin α-NPD films and cause a reduction of the charge injection barrier at the organic/organic interface. The results show that the height of this barrier is determined by the surface dipoles of the individual organic films that relate to the orientation of intramolecular polar bonds at the interface.",
author = "Y. Wang and Toshinori Matsusima and H. Murata and A. Fleurence and Y. Yamada-Takamura and R. Friedlein",
year = "2012",
month = "1",
day = "1",
doi = "10.1016/j.orgel.2012.05.038",
language = "English",
volume = "13",
pages = "1853--1858",
journal = "Organic Electronics: physics, materials, applications",
issn = "1566-1199",
publisher = "Elsevier",
number = "10",

}

TY - JOUR

T1 - Molecular order, charge injection efficiency and the role of intramolecular polar bonds at organic/organic heterointerfaces

AU - Wang, Y.

AU - Matsusima, Toshinori

AU - Murata, H.

AU - Fleurence, A.

AU - Yamada-Takamura, Y.

AU - Friedlein, R.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The effect of orientational changes in thin films of the non-crystalline hole transport material α-N-N′-diphenyl N-N″-bis(1 naphthayl)-1,1′-biphenyl-4,4′-diamine (α-NPD) on the energy level alignment and the film electronic structure has been investigated by angle-resolved ultraviolet photoelectron spectroscopy and related to the transport characteristics of hole-only devices. Changes in the anisotropic α-sexithiophene (α-6T) substrate from a "standing" to a "flat" molecular orientation induced by mechanical rubbing lead to molecular order and a preferential orientation in subsequently deposited thin α-NPD films and cause a reduction of the charge injection barrier at the organic/organic interface. The results show that the height of this barrier is determined by the surface dipoles of the individual organic films that relate to the orientation of intramolecular polar bonds at the interface.

AB - The effect of orientational changes in thin films of the non-crystalline hole transport material α-N-N′-diphenyl N-N″-bis(1 naphthayl)-1,1′-biphenyl-4,4′-diamine (α-NPD) on the energy level alignment and the film electronic structure has been investigated by angle-resolved ultraviolet photoelectron spectroscopy and related to the transport characteristics of hole-only devices. Changes in the anisotropic α-sexithiophene (α-6T) substrate from a "standing" to a "flat" molecular orientation induced by mechanical rubbing lead to molecular order and a preferential orientation in subsequently deposited thin α-NPD films and cause a reduction of the charge injection barrier at the organic/organic interface. The results show that the height of this barrier is determined by the surface dipoles of the individual organic films that relate to the orientation of intramolecular polar bonds at the interface.

UR - http://www.scopus.com/inward/record.url?scp=84862986963&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862986963&partnerID=8YFLogxK

U2 - 10.1016/j.orgel.2012.05.038

DO - 10.1016/j.orgel.2012.05.038

M3 - Article

VL - 13

SP - 1853

EP - 1858

JO - Organic Electronics: physics, materials, applications

JF - Organic Electronics: physics, materials, applications

SN - 1566-1199

IS - 10

ER -