Single-layered hybrid DBPPV-CdSe-ZnS quantum-dot light-emitting diodes

Chun Yuan Huang, Yan Kuin Su, Ten Chin Wen, Tzung Fang Guo, Ming Lung Tu

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We have demonstrated the fabrication and characterization of single-layered hybrid polymer-quantum-dot light-emitting diodes (PQD-LEDs) with the emissive composite film of 2,3-dibutoxy-1,4-poly(phenylene vinylene) (DBPPV) and inorganic CdSe-ZnS core/shell quantum dots (QDs). It is observed that both the electrical and optical characteristics are significantly improved by adjusting the thickness of the emissive layer. For the device with composite film thickness of 103 nm, the turn-on voltage is 4.1 V, and the maximum luminance of 4100 cd/m2 as well as maximum luminous efficiency of 1.35 cd/A are achieved at 9.6 and 7.6 V, respectively. The optimum emission contribution of luminescence from QDs to the whole luminance is 38%. However, the QD luminescence is mainly limited by the Förster energy transfer mechanism and no obvious QD-related injected carrier trapping is observed. To our knowledge, this is the first demonstration of PQD-LEDs that consist of DBPPV and CdSe-ZnS QDs.

Original languageEnglish
Pages (from-to)282-284
Number of pages3
JournalIEEE Photonics Technology Letters
Volume20
Issue number4
DOIs
Publication statusPublished - 2008 Feb 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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