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 - 1 Jan 2014

Keywords

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

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