Structure induced conductivity enhancement in metal-doped molybdenum oxide thin films

David Cheyns, Benjamin Kam, Karolien Vasseur, Paul Heremans, Barry P. Rand

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

We study doped molybdenum oxide (MoO3) thin films as thickness-tunable transport layers in organic photovoltaics. In an illustrative device, we show that the introduction of thick pristine MoO3 layers is unfavorable for device operation due to an increased series resistance, but this can be overcome by doping the transport layer with small amounts of metal. However, as opposed to a conventional doping mechanism, we ascribe the doping-induced conductivity enhancement to originate from an improved crystallinity of MoO3. This latter effect appears to be an example of metal induced crystallization. These flat, transparent, and conductive MoO 3 layers are ideal candidates for high work function transport layers in several architectures of organic or other thin film optoelectronic devices and we demonstrate this by its use in tandem organic photovoltaics.

Original languageEnglish (US)
Article number043109
JournalJournal of Applied Physics
Volume113
Issue number4
DOIs
StatePublished - Jan 28 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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