Blue polymer light-emitting diodes from poly(9,9-dihexylfluorene-alt-co-2, 5-didecyloxy-para-phenylene)

Wang Lin Yu, Yong Cao, Jian Pei, Wei Huang, Alan J. Heeger

Research output: Contribution to journalArticlepeer-review

136 Scopus citations

Abstract

Deep blue photoluminescence and electroluminescence are demonstrated from a soluble conjugated polymer, poly(9,9-dihexylfluorene-alt-co-2,5-didecyloxy-para-phenylene). The PL quantum efficiency is approximately 40%. Cyclic voltammetry measurements indicate that the highest occupied molecular orbital and lowest unoccupied molecular orbital energies are 5.66 and 2.62 eV below vacuum, respectively. Single-layer and multilayer light-emitting diodes emit deep blue light (peak at ∼420 nm).

Original languageEnglish
Pages (from-to)3270-3272
Number of pages3
JournalApplied Physics Letters
Volume75
Issue number21
DOIs
StatePublished - 22 Nov 1999
Externally publishedYes

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