Structural, optical and electrochromic properties of Nb-doped MoO 3 thin films

S. S. Mahajan, S. H. Mujawar, P. S. Shinde, A. I. Inamdar, P. S. Patil

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Niobium (Nb) doped molybdenum trioxide (MoO 3 ) thin films have been synthesized using spray pyrolysis deposition technique. The structural changes were observed with the help of X-ray diffraction technique. With increasing Nb concentration, the structure of MoO 3 undergoes a phase transformation from α-orthorhombic to amorphous with nano-sized grains. The thread like reticulated morphology is converted into spongy like structure at higher Nb concentration (9 at% Nb). It is seen that Nb doping can lead to significant surface morphology changes in MoO 3 films. It was found that the coloration efficiency increases with doping concentration. With increasing Nb concentration charge capacity, reversibility and electrochemical stability increases. The improvement is attributed to the amorphous structure of the doped samples that favors easy intercalation and deintercalation processes. Hence, we have successfully demonstrated formation of an adequate host for electrochromic devices with Nb (9 at%) doped MoO 3 samples.

Original languageEnglish
Pages (from-to)5895-5898
Number of pages4
JournalApplied Surface Science
Volume254
Issue number18
DOIs
StatePublished - 15 Jul 2008

Keywords

  • Molybdenum oxide
  • Optical and electrochemical properties
  • Spray pyrolysis
  • Structural
  • Thin films

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