TY - JOUR
T1 - Synthesis and characterization of red electrophosphorescent polymers containing pendant iridium(III) complex moieties
AU - Xu, Fei
AU - Mi, Dongbo
AU - Bae, Hong Ryeol
AU - Suh, Min Chul
AU - Yoon, Ung Chan
AU - Hwang, Do Hoon
PY - 2013/9/20
Y1 - 2013/9/20
N2 - A series of fluorene-carbazole copolymers containing the pendant phosphor chromophore Ir(absn)2(acac) (absn: 2-(1-naphthyl)benzothiazole; acac: acetylacetone) were designed and synthesized via Yamamoto coupling. In the film state, these copolymers exhibited absorption and emission peaks at approximately 389 and 426 nm, respectively, which originated from the fluorene backbone. However, in electroluminescent (EL) devices, a significantly red-shifted emission at approximately 611 nm was observed, which was attributed to the pendant iridium(III) complex. Using these copolymers as a single emission layer, polymer light-emitting devices with ITO/PEDOT:PSS/polymer:DNTPD/TmPyPb/ LiF/Al configurations exhibited a saturated red emission at 611 nm. The attached iridium(III) complex had a significant effect on the EL performance. A maximum luminous efficiency of 0.85 cd/A, maximum external quantum efficiency of 0.77, maximum power efficiency of 0.48 lm/W, and maximum luminance of 883 cd/m 2 were achieved from a device fabricated with the copolymer containing the iridium(III) complex in a 2% molar ratio.
AB - A series of fluorene-carbazole copolymers containing the pendant phosphor chromophore Ir(absn)2(acac) (absn: 2-(1-naphthyl)benzothiazole; acac: acetylacetone) were designed and synthesized via Yamamoto coupling. In the film state, these copolymers exhibited absorption and emission peaks at approximately 389 and 426 nm, respectively, which originated from the fluorene backbone. However, in electroluminescent (EL) devices, a significantly red-shifted emission at approximately 611 nm was observed, which was attributed to the pendant iridium(III) complex. Using these copolymers as a single emission layer, polymer light-emitting devices with ITO/PEDOT:PSS/polymer:DNTPD/TmPyPb/ LiF/Al configurations exhibited a saturated red emission at 611 nm. The attached iridium(III) complex had a significant effect on the EL performance. A maximum luminous efficiency of 0.85 cd/A, maximum external quantum efficiency of 0.77, maximum power efficiency of 0.48 lm/W, and maximum luminance of 883 cd/m 2 were achieved from a device fabricated with the copolymer containing the iridium(III) complex in a 2% molar ratio.
KW - Fluorene
KW - Iridium(III) complex
KW - Phosphorescent polymer light-emitting device
UR - http://www.scopus.com/inward/record.url?scp=84885400919&partnerID=8YFLogxK
U2 - 10.5012/bkcs.2013.34.9.2609
DO - 10.5012/bkcs.2013.34.9.2609
M3 - Article
AN - SCOPUS:84885400919
SN - 0253-2964
VL - 34
SP - 2609
EP - 2615
JO - Bulletin of the Korean Chemical Society
JF - Bulletin of the Korean Chemical Society
IS - 9
ER -