Observation of space-charge-limited current due to charge generation at interface of molybdenum dioxide and organic layer

Toshinori Matsushima, Hideyuki Murata

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Current density-voltage characteristics of hole-only devices are influenced by thicknesses of molybdenum dioxide (MoO2) and molybdenum trioxide (MoO3) as buffer layers. A space-charge-limited current of N, N′ -diphenyl- N, N′ -bis(1-naphthyl)- 1, 1′ -biphenyl- 4, 4′ -diamine (α-NPD) is observed in a wide range of MoO2 thicknesses from 0.25 to 10 nm and at a specific MoO3 thickness of 0.75 nm. Charge transfer characteristics at interfaces of MoO2 /α-NPD and MoO3 /α-NPD are investigated from changes in fluorescence intensity of α-NPD. Reasons of the improved device characteristics are discussed in terms of interfacial charge generation composed of charged transfer and charge separation.

Original languageEnglish
Article number203306
JournalApplied Physics Letters
Volume95
Issue number20
DOIs
Publication statusPublished - Nov 30 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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