Browsing by Author "Liu, Michelle S."

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Efficient and robust charge-transporting polymers for highly efficient polymer light-emitting diodes
(2009-03-22)
Huang, Fei
;
Cheng, Yen-Ju
;
Liu, Michelle S.
;
Shih, Ping-I
;
Shu, Chingfong
Lithium salt doped conjugated polymers as electron transporting materials for highly efficient blue polymer light-emitting diodes
(2008-12-15)
Huang, Fei
;
Shih, Ping-I
;
Liu, Michelle S.
;
Shu, Ching-Fong
;
Jen, Alex K. -Y.
Highly efficient blue polymer light-emitting diodes (PLEDs) are fabricated using a conjugated polymer, poly[9,9-bis(2-(2-(2-diethanol-amino-ethoxy) ethoxy) ethyl) fluorene-alt-4, 4(')-phenylether] as an electron transporting layer (ETL). It was found that the performance of these blue-emitting devices could be greatly improved if the ETL was doped with LiF or Li(2)CO(3) salts. A bis[(4,6-di-fluorophenyl)-pyridinato-N, C(2)] (picolinate) Ir(III) (FIrpic) complex based blue phosphorescent PLED exhibited a maximum luminance efficiency of 20.3 cd/A with a luminance of 1600 cd/m(2) at the current density of 7.9 mA/cm(2) and drive voltage of 8.0 V.