Charge transfer-induced horizontal orientation of organic molecules near transition metal oxide surfaces

Toshinori Matsushima, Hideyuki Murata

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The influence of charge transfer from organic molecules to transition metal oxide on molecular orientation characteristics of N,N′-diphenyl-N, N′-bis(1-naphthyl)-1,1′-biphenyl-4,4′-diamine (α-NPD) was investigated. Absorption peaks originating from neutral and cationic states of α-NPD increased in absorbance when α-NPD was deposited on metal oxides (MoO2, MoO3, and WO3). Photoluminescence from this α-NPD was directional normal to the film plane. These results indicate that α-NPD is horizontally oriented near the metal oxide surfaces so that charge transfer from α-NPD to metal oxide occurs efficiently. Such horizontal orientation of α-NPD enhanced current density of hole-only α-NPD devices because of improvement of wave function overlap and charge transfer degree at the metal oxide/α-NPD interface.

Original languageEnglish
Pages (from-to)1149-1156
Number of pages8
JournalOrganic Electronics
Volume14
Issue number4
DOIs
Publication statusPublished - Jan 1 2013
Externally publishedYes

Fingerprint

horizontal orientation
Oxides
Transition metals
metal oxides
Charge transfer
transition metals
charge transfer
Molecules
molecules
Metals
Molecular orientation
diamines
Wave functions
Photoluminescence
Current density
neodymium pyrocatechin disulfonate
wave functions
current density
Diamines
photoluminescence

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

Charge transfer-induced horizontal orientation of organic molecules near transition metal oxide surfaces. / Matsushima, Toshinori; Murata, Hideyuki.

In: Organic Electronics, Vol. 14, No. 4, 01.01.2013, p. 1149-1156.

Research output: Contribution to journalArticle

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