Junction properties and conduction mechanism of new terbium complexes with triethylene glycol ligand for potential application in organic electronic device

N. K. Za'Aba, M. A.Mohd Sarjidan, W. H.Abd Majid, Eny Kusrini, Muhammad I. Saleh

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Terbium-picrate triethylene glycol (EO3-Tb-Pic) complex was prepared in thin film and single layer device structure of ITO/EO3-Tb-Pic/Al, using spin coating technique. The UV-Vis absorption spectroscopy analysis was performed to evaluate the electronic molecular transition of the complex. The optical band gap, Eg estimated from the Tauc model revealed that EO3-Tb-Pic thin film exhibited a direct transition with Eg of 2.70 eV. The electronic parameters of the ITO/EO3-Tb-Pic/Al device such as the ideality factor n, barrier height Φb, saturation current Io, and series resistance Rs, were extracted from the conventional lnI-V, Cheung's functions and Norde's method. It was found that the evaluated parameters calculated from Norde's and Cheung's methods were consistent with those calculated from the conventional I-V method. In the double logarithmic I-V plot, three distinct regions based on the slope were identified, and the conduction mechanisms were discussed and explained. The mobility, μ value was estimated from SCLC region as 2.58×10-7 cm2/(V·s). This newly obtained lanthanide complex may be potentially utilized in electronic devices.

Original languageEnglish
Pages (from-to)633-640
Number of pages8
JournalJournal of Rare Earths
Volume32
Issue number7
DOIs
Publication statusPublished - Jul 2014

Keywords

  • terbium-picrate complex triethylene glycol Tauc model optical band gap current-voltage rare earths

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