Color-tunable multilayer light-emitting diodes based on conjugated polymers

C. C. Huang*, Hsin-Fei Meng, G. K. Ho, C. H. Chen, Chain-Shu Hsu, J. H. Huang, S. F. Horng, B. X. Chen, L. C. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


The mechanism which enabled wide-range color-tuning for multilayer polymer light-emitting diodes (LED) based on poly(p-phenylene vinylene) (PPV) and polyfluorene (PF) was investigated. The wide-range low-voltage continuous color tuning was achieved in multilayer LED by using the high-efficiency electroluminescent conjugated polymers. The color of the emitted photon depended on position of the electron-hole recombination which consisted of three layers for red, green and blue emission with one extra layer for electron blocking. The recombination zone was pushed away from the cathode and concentrated in different emissive layers due to the stronger field dependence of electron mobility relative to hole mobility.

Original languageEnglish
Pages (from-to)1195-1197
Number of pages3
JournalApplied Physics Letters
Issue number7
StatePublished - 16 Feb 2004

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