Open AccessWhite-light-emitting diode based on a single-layer polymer
Author(s) -
B. Z. Wang,
X. P. Zhang,
H. M. Liu
Publication year - 2013
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4807735
Subject(s) - electroluminescence , materials science , diode , layer (electronics) , optoelectronics , polymer , wavelength , white light , emission spectrum , oled , light emitting diode , light emission , optics , spectral line , nanotechnology , physics , composite material , astronomy
A broad-band light-emitting diode was achieved in a single-layer device based on pure poly(9,9′-dioctylfluorene-co-bis-N,N′-(4-butylphenyl)-bis-N,N′-phenyl-1,4-phenylenediamine) (PFB). Electromer emission was observed in the red with a center wavelength of about 620 nm in electroluminescence (EL) spectrum. This kind of emission exhibits strong dependence on the thickness of the PFB layer, so that the shape of the EL spectrum may be adjusted through changing the thickness of the active polymer layer to balance between the intrinsic PFB emission in the blue and the electromer emission in the red. Thus, white light emission may be achieved from such a single-layer single-material diode