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Efficient light emitting diodes from ternary blends of PPV‐based copolymers
Author(s) -
Cirpan Ali,
Aroguz Z. Ayse,
Karasz Frank E.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24650
Subject(s) - ternary operation , materials science , copolymer , electroluminescence , differential scanning calorimetry , light emitting diode , photoluminescence , absorbance , quantum efficiency , polymer chemistry , polymer blend , diode , analytical chemistry (journal) , chemical engineering , polymer , optoelectronics , chemistry , organic chemistry , composite material , thermodynamics , chromatography , physics , layer (electronics) , computer science , engineering , programming language
Light emitting diodes (LEDs) were prepared using ternary blends of block copolymers emitting in the blue ( I and II ) and green ( III ) regime. These blends were studied in terms of their absorbance, photoluminescence (PL), and electroluminescence (EL) spectra. The PL spectra in dilute solution and in the solid state were compared. Förster energy transfer from I and II to III was studied in the solid state. The EL device made using a ternary blend with the ratio (1 : 1 : 1) showed the highest EL quantum efficiency. Differential scanning calorimetry (DSC) measurements have been made to investigate the phase separation in these copolymer blends. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 2509–2511, 2006