Effects of novel transition metal oxide doped bilayer structure on hole injection and transport characteristics for organic light-emitting diodes

Chi Ting Tsai, Ya Han Liu, Jian Fu Tang, Po Ching Kao, Chung Hao Chiang, Sheng Yuan Chu

研究成果: Article

3 引文 斯高帕斯(Scopus)

摘要

A contemporary hole injection bilayer structure (HIBL) based on molybdenum trioxide (MoO3)-doped N,N′-Di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB) has been demonstrated and compared with several efficient transition metal oxide (TMO)-based hole injection layers (HILs). Device performances of OLEDs was significantly improved by the utilization of this HIBL. Results of electroluminescence (EL) spectra, hole-only current density-voltage test and capacitance measurement by impedance spectroscopy (IS) are indicative of enhanced hole injection and transport characteristics. Moreover, ultraviolet photoelectron spectroscopy (UPS) results authenticated a cascading highest occupied molecular orbital (HOMO) energy level contributed to both improved hole injection and transport properties, therefore leads to better carrier balance and device efficiency in OLEDs.

原文English
頁(從 - 到)121-126
頁數6
期刊Synthetic Metals
243
DOIs
出版狀態Published - 2018 九月

    指紋

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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