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

Toshinori Matsushima, Hideyuki Murata

Research output: Contribution to journalArticlepeer-review

13 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 - Apr 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Charge transfer-induced horizontal orientation of organic molecules near transition metal oxide surfaces'. Together they form a unique fingerprint.

Cite this