Red emitting poly

J.H. Kim and H. Lee, Synthesis, electrochemistry, and electroluminescence of novel red-emitting poly(p-phenylene vinylene) derivative with 2-pyran-4-ylidene-malononitrile obtained by the Heck reaction, Chem. Mater., 14 2270-2275, 2002. 

Li, X.Z., Y. Zhang, R.Q. Yang, J. Huang, W. Yang, and Y. Gao. 2005. Novel saturated red-emitting poly(p-phenylenevinylene) copolymers with narrow-band-gap units of 2,1,3-benzothiadiazole synthesized by a palladium-catalyzed stiUe coupling reaction. / Polym Sci Part A Polym Chem... 

LbL films with hydrophobic substrates, polymers and NCs. The LbL films in the present work were produced with the dipping robot (DR-0, Riegler Kirstein). The cleaned ITO substrates were alternately dipped in the aqueous solution of poly(diallyldimethylammonium chloride) (25 mg/L) and red emitting thiol capped CdTe NCs (20 g/L). The last layer always consists of NCs. Typical architecture ofNLED is presented in Fig. 1. 

The first oxetane-functionalized emitter were pyrene derivatives (Fig. 9.19(b), [46]), however, with very limited performance in OLEDs. Later, a poly(pheny-lene-fluorene)-copolymer was reported, however, without any electroluminescence data (Fig. 9.19(c), [47]). The breakthrough came with a recent report on a crosslinkable class of state-of-the-art spirofluorenes (Fig. 9.19(a), [48, 49]). By incorporating a green- and red-emitting comonomer, it was possible to generate the three primary colors (RGB) necessary for color-display applications. More recent concepts use sterically hindered 9,9 -diarylfluorene blocks to link conjugated oligomers (Fig. 9.19(d), [50]). 

Polymer honeycomb films can be also used as templates to produce micropattemed inorganic/organic structures by external deposition of NPs or chemical vacuum deposition CVD. The selective assembly of the Si02 NPs into the pores is strongly impacted by the wettability and thus the Cassie-Baxter/ Wenzel transition was demonstrated as the key factor of such an approach [182]. Cadmium tellurium quantum dots were deposited onto polystyrene honeycomb film leading to red emitting films [183]. Recently, surface-enhanced Raman Scattering SERS substrates were also prepared by Ag NPs adsorption onto poly (AW-dimethylaminoethyl methacrylate) PDMAEMA surface [184]. 

ErQ3 gives both PL and EL emission at 1,500 nm.207-209 Red light (614 nm) is emitted by [Eu(TTFA)3(phen)] (Figure 2(a)) doped in a poly(A-vinylcarbazole) layer.210 The complex [Eu(TTFA)3(TPPO)2] (TPPO = triphenylphosphine oxide, see Figure 2(f)) emits in the red when incorporated in OLEDs,211,212 behavior which is enhanced when the material is heat treated.204 Near-IR EL and PL emission was observed from blends of polyfp-phenylene-vinylene) with [Yb(TPP)(ACAC)] and [Er(TPP)(ACAC)] (H2TPP is 5,10,15,20-tetraphenylporphyrin) by both EL and PL 213... 

An unusual synthetic approach to PF copolymers was demonstrated by Bunz and coworkers [370], who prepared poly(fluorene ethynylene) 281a-e by metathesis polymerization reaction (Scheme 2.44) [370], The aggregation of polymers 281 in concentrated solutions and in solid state is manifested in slight (up to 10-20 nm) red shift of the absorbance and emission peaks, although solutions and films emit pure blue light. 

Y-H. Niu, J. Huang, and Y. Cao, High-efficiency polymer light-emitting diodes with stable saturated red emission use of carbazole-based copolymer blends in a poly(p-phenylene vinylene) derivative, Adv. Mater., 15 807-811, 2003. 

T. Yirgili, D. Lidzey, and D.D.C. Bradley, Efficient energy transfer from blue to red in tetra-porphyrin-doped poly(9,9-dioctylfluorene) light-emitting diodes, Adv. Mater., 12 58-62, 2000. 

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