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Multifunctional materials for OFETs, LEFETs and NIR PLEDs

Timothy Steckler (Institutionen för kemi- och bioteknik, Polymerteknologi) ; M. J. Lee ; Z. Chen ; O. Fenwick ; Mats R. Andersson (Institutionen för kemi- och bioteknik, Polymerteknologi) ; F. Cacialli ; H. Sirringhaus
Journal of Materials Chemistry C (2050-7526). Vol. 2 (2014), 26, p. 5133-5141.
[Artikel, refereegranskad vetenskaplig]

A family of phthalimide-thiophene copolymers with linear and branched alkyl chains attached to the imide nitrogen have been synthesized. Their optical and electronic properties were investigated along with their applications in OFETs and LEFETs. The phthalimide-thiophene copolymer having a C16 straight alkyl chain on the phthalimide yielded the highest mobilities and PLQE with mobilities of 1 x 10(-3) cm(2) V-1 s(-1) for holes and 1 x 10(-2) cm(2) V-1 s(-1) for electrons with a PLQE of similar to 28% in the solid state. Since these polymers are ambipolar and emissive, they have proven to be useful for applications as a host material for NIR PLEDs. In this study a 1% loading of NIR emitting DAD segments based on bisthienyl(thiadiazoloquinoxaline) or bisthienyl(benzotriazolothiadiazole) were incorporated into the phthalimide-thiophene polymerization. Using the branched CH(C8H17)(2) alkyl chain on the host phthalimide-thiophene copolymer combined with the bisthienyl(benzotriazolothiadiazole) emitter resulted in the most efficient (emission maximum >= 850 nm) single layer NIR-emitting PLED to date with an EQE of 0.27% emitting at 885 nm.

Nyckelord: LIGHT-EMITTING-DIODES, FIELD-EFFECT TRANSISTORS, THIN-FILM TRANSISTORS, CONJUGATED POLYMER, HOLE-MOBILITY, RECOMBINATION ZONE, SOLAR-CELLS, GAP, POLYMER, AMBIPOLAR, COPOLYMERS



Denna post skapades 2014-07-22.
CPL Pubid: 200645

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)

Ämnesområden

Materialteknik
Textil-, gummi- och polymermaterial

Chalmers infrastruktur