Open AccessPolarized blue polymer light-emitting diodes utilizing rubbed hole injection layers
Author(s) -
Zhu De-Xi,
Hongyu Zhen,
Hui Ye,
Xü Liu
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.596
Subject(s) - materials science , rubbing , electroluminescence , annealing (glass) , pedot:pss , photoluminescence , optoelectronics , oled , polyfluorene , diode , optics , polymer , composite material , layer (electronics) , physics
Polarized blue electroluminescence has been achieved from the oriented poly (9, 9-dioctylfluorene) (PFO) film on a rubbed hole injection layer poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) at the CIE coordinates of (0.20, 0.21). Polarized absorption and photoluminescence spectra reveal that the dichroism of the PFO film is influenced by the rubbing strength of the alignment layer, the annealing temperature, and annealing time, among which the annealing temperature is the most significant factor. An electroluminescence polarization ratio of about 3 is achieved when the rubbing depth is 50μm, the annealing temperature is 200℃ and the annealing time is 30 min.