Nano Perspectives

Nanoscale Research Letters

, Volume 4, Issue 5, pp 485-490

Open Access This content is freely available online to anyone, anywhere at any time.

Electroluminescent Characteristics of DBPPV–ZnO Nanocomposite Polymer Light Emitting Devices

  • M. V. Madhava RaoAffiliated withInstitute of Microelectronics, Department of Electrical Engineering, Advanced Optoelectronic Technology Center, National Cheng Kung University Email author 
  • , Yan Kuin SuAffiliated withInstitute of Microelectronics, Department of Electrical Engineering, Advanced Optoelectronic Technology Center, National Cheng Kung University
  • , Tsung Syun HuangAffiliated withInstitute of Microelectronics, Department of Electrical Engineering, Advanced Optoelectronic Technology Center, National Cheng Kung University
  • , Chen-Han YehAffiliated withInstitute of Microelectronics, Department of Electrical Engineering, Advanced Optoelectronic Technology Center, National Cheng Kung University
  • , Ming-Lung TuAffiliated withInstitute of Microelectronics, Department of Electrical Engineering, Advanced Optoelectronic Technology Center, National Cheng Kung University

Abstract

We have demonstrated that fabrication and characterization of nanocomposite polymer light emitting devices with metal Zinc Oxide (ZnO) nanoparticles and 2,3-dibutoxy-1,4-poly(phenylenevinylene) (DBPPV). The current and luminance characteristics of devices with ZnO nanoparticles are much better than those of device with pure DBPPV. Optimized maximum luminance efficiencies of DBPPV–ZnO (3:1 wt%) before annealing (1.78 cd/A) and after annealing (2.45 cd/A) having a brightness 643 and 776 cd/m2 at a current density of 36.16 and 31.67 mA/cm2 are observed, respectively. Current density–voltage and brightness–voltage characteristics indicate that addition of ZnO nanoparticles can facilitate electrical injection and charge transport. The thermal annealing is thought to result in the formation of an interfacial layer between emissive polymer film and cathode.

Keywords

Polymer light emitting devices Electroluminescent ZnO nanoparticle Surface morphology Thermal annealing