Energy-level alignments and photo-induced carrier processes at the heteromolecular interface of quaterrylene and N,N′-dioctyl-3,4,9,10- perylenedicarboximide

Nobuya Hiroshiba, R. Hayakawa, T. Chikyow, Y. Yamashita, H. Yoshikawa, K. Kobayashi, K. Morimoto, K. Matsuishi, Y. Wakayama

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Photo-induced carrier processes at the heteromolecular interface of N,N′-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) and quaterrylene (QT) on a molecular scale were examined by optical and photoelectron spectroscopy. The energy level alignments of the molecules were determined by X-ray photoelectron spectroscopy and the optical absorption spectra for detailed investigation of the photo-induced carrier process were analysed. A reduction in photoluminescence from PTCDI-C8 on QT was observed, clearly demonstrating that the excitons generated in the PTCDI-C 8 layer are effectively dissociated at the heteromolecular interface. One important factor inducing this effective charge dissociation is the highly ordered molecular packing, which acts to increase the exciton diffusion length. Moreover, a specific increase in the photoluminescence excitation spectrum was observed around 3 eV, indicating that simultaneous exciton generation in both the QT and PTCDI-C8 layers effectively suppresses such charge dissociation of the excitons. In other words, the existence of excitons in each molecule at the heteromolecular interface and HOMO-LUMO level alignment at the interface play an essential role in charge dissociation. Our results provide a striking insight into intermolecular interactions in the carrier process at the heteromolecular interface such as exciton generation, the recombination and dissociation processes, and the photovoltaic effect in organic semiconductors.

Original languageEnglish
Pages (from-to)6280-6285
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number13
DOIs
Publication statusPublished - 2011 Apr 7
Externally publishedYes

Fingerprint

Electron energy levels
energy levels
alignment
excitons
dissociation
Photoluminescence
photoelectron spectroscopy
Photovoltaic effects
photoluminescence
photovoltaic effect
Molecules
Semiconducting organic compounds
organic semiconductors
Photoelectron spectroscopy
diffusion length
Light absorption
LDS 751
optical spectrum
molecules
Absorption spectra

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Energy-level alignments and photo-induced carrier processes at the heteromolecular interface of quaterrylene and N,N′-dioctyl-3,4,9,10- perylenedicarboximide. / Hiroshiba, Nobuya; Hayakawa, R.; Chikyow, T.; Yamashita, Y.; Yoshikawa, H.; Kobayashi, K.; Morimoto, K.; Matsuishi, K.; Wakayama, Y.

In: Physical Chemistry Chemical Physics, Vol. 13, No. 13, 07.04.2011, p. 6280-6285.

Research output: Contribution to journalArticle

Hiroshiba, N, Hayakawa, R, Chikyow, T, Yamashita, Y, Yoshikawa, H, Kobayashi, K, Morimoto, K, Matsuishi, K & Wakayama, Y 2011, 'Energy-level alignments and photo-induced carrier processes at the heteromolecular interface of quaterrylene and N,N′-dioctyl-3,4,9,10- perylenedicarboximide', Physical Chemistry Chemical Physics, vol. 13, no. 13, pp. 6280-6285. https://doi.org/10.1039/c0cp02663h
Hiroshiba, Nobuya ; Hayakawa, R. ; Chikyow, T. ; Yamashita, Y. ; Yoshikawa, H. ; Kobayashi, K. ; Morimoto, K. ; Matsuishi, K. ; Wakayama, Y. / Energy-level alignments and photo-induced carrier processes at the heteromolecular interface of quaterrylene and N,N′-dioctyl-3,4,9,10- perylenedicarboximide. In: Physical Chemistry Chemical Physics. 2011 ; Vol. 13, No. 13. pp. 6280-6285.
@article{1b0cf8914be646e299b3822d5984608d,
title = "Energy-level alignments and photo-induced carrier processes at the heteromolecular interface of quaterrylene and N,N′-dioctyl-3,4,9,10- perylenedicarboximide",
abstract = "Photo-induced carrier processes at the heteromolecular interface of N,N′-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) and quaterrylene (QT) on a molecular scale were examined by optical and photoelectron spectroscopy. The energy level alignments of the molecules were determined by X-ray photoelectron spectroscopy and the optical absorption spectra for detailed investigation of the photo-induced carrier process were analysed. A reduction in photoluminescence from PTCDI-C8 on QT was observed, clearly demonstrating that the excitons generated in the PTCDI-C 8 layer are effectively dissociated at the heteromolecular interface. One important factor inducing this effective charge dissociation is the highly ordered molecular packing, which acts to increase the exciton diffusion length. Moreover, a specific increase in the photoluminescence excitation spectrum was observed around 3 eV, indicating that simultaneous exciton generation in both the QT and PTCDI-C8 layers effectively suppresses such charge dissociation of the excitons. In other words, the existence of excitons in each molecule at the heteromolecular interface and HOMO-LUMO level alignment at the interface play an essential role in charge dissociation. Our results provide a striking insight into intermolecular interactions in the carrier process at the heteromolecular interface such as exciton generation, the recombination and dissociation processes, and the photovoltaic effect in organic semiconductors.",
author = "Nobuya Hiroshiba and R. Hayakawa and T. Chikyow and Y. Yamashita and H. Yoshikawa and K. Kobayashi and K. Morimoto and K. Matsuishi and Y. Wakayama",
year = "2011",
month = "4",
day = "7",
doi = "10.1039/c0cp02663h",
language = "English",
volume = "13",
pages = "6280--6285",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
number = "13",

}

TY - JOUR

T1 - Energy-level alignments and photo-induced carrier processes at the heteromolecular interface of quaterrylene and N,N′-dioctyl-3,4,9,10- perylenedicarboximide

AU - Hiroshiba, Nobuya

AU - Hayakawa, R.

AU - Chikyow, T.

AU - Yamashita, Y.

AU - Yoshikawa, H.

AU - Kobayashi, K.

AU - Morimoto, K.

AU - Matsuishi, K.

AU - Wakayama, Y.

PY - 2011/4/7

Y1 - 2011/4/7

N2 - Photo-induced carrier processes at the heteromolecular interface of N,N′-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) and quaterrylene (QT) on a molecular scale were examined by optical and photoelectron spectroscopy. The energy level alignments of the molecules were determined by X-ray photoelectron spectroscopy and the optical absorption spectra for detailed investigation of the photo-induced carrier process were analysed. A reduction in photoluminescence from PTCDI-C8 on QT was observed, clearly demonstrating that the excitons generated in the PTCDI-C 8 layer are effectively dissociated at the heteromolecular interface. One important factor inducing this effective charge dissociation is the highly ordered molecular packing, which acts to increase the exciton diffusion length. Moreover, a specific increase in the photoluminescence excitation spectrum was observed around 3 eV, indicating that simultaneous exciton generation in both the QT and PTCDI-C8 layers effectively suppresses such charge dissociation of the excitons. In other words, the existence of excitons in each molecule at the heteromolecular interface and HOMO-LUMO level alignment at the interface play an essential role in charge dissociation. Our results provide a striking insight into intermolecular interactions in the carrier process at the heteromolecular interface such as exciton generation, the recombination and dissociation processes, and the photovoltaic effect in organic semiconductors.

AB - Photo-induced carrier processes at the heteromolecular interface of N,N′-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) and quaterrylene (QT) on a molecular scale were examined by optical and photoelectron spectroscopy. The energy level alignments of the molecules were determined by X-ray photoelectron spectroscopy and the optical absorption spectra for detailed investigation of the photo-induced carrier process were analysed. A reduction in photoluminescence from PTCDI-C8 on QT was observed, clearly demonstrating that the excitons generated in the PTCDI-C 8 layer are effectively dissociated at the heteromolecular interface. One important factor inducing this effective charge dissociation is the highly ordered molecular packing, which acts to increase the exciton diffusion length. Moreover, a specific increase in the photoluminescence excitation spectrum was observed around 3 eV, indicating that simultaneous exciton generation in both the QT and PTCDI-C8 layers effectively suppresses such charge dissociation of the excitons. In other words, the existence of excitons in each molecule at the heteromolecular interface and HOMO-LUMO level alignment at the interface play an essential role in charge dissociation. Our results provide a striking insight into intermolecular interactions in the carrier process at the heteromolecular interface such as exciton generation, the recombination and dissociation processes, and the photovoltaic effect in organic semiconductors.

UR - http://www.scopus.com/inward/record.url?scp=79952730912&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952730912&partnerID=8YFLogxK

U2 - 10.1039/c0cp02663h

DO - 10.1039/c0cp02663h

M3 - Article

C2 - 21359347

AN - SCOPUS:79952730912

VL - 13

SP - 6280

EP - 6285

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 13

ER -