Synthesis of a polyphenylene light-emitting polymer

Jing, Wu; Kraft, Arno; Moratti, Stephen C.; Grüner, J.; Cacialli, Franco; Hamer, P.J.; Holmes, Andrew B.; Friend, Richard H.

doi:10.1016/0379-6779(94)90032-9

Cited by 41 publications

(8 citation statements)

References 17 publications

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“…This band is similar to the 0-0 vibronic band in the PPV emission spectrum. 10 The 0-0 and 0-1 vibronic transitions in the PL and EL spectra of PPV films are associated with surface and bulk state formation, respectively. In the double-layer devices based on 1, because of the good hole injection energy level match, the recombination center presumably will move from the bulk toward the polymer/Ca interface.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Luminescent Studies of Poly(phenylenevinylene)s Containing a Biphenyl Moiety

et al. 2001

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The polymers discussed in this contribution consist of phenylenevinylene chromophores linked together across flexible biphenyl “hinges” to shorten the effective conjugation length and to give sufficiently twisted structures that interchain aggregation is limited or prevented. They are poly[(2,5-dihexyloxy-p-phenylenevinylene)-alt-(4,4‘-dihexyloxy-3,3‘-biphenylenevinylene)] (1), poly[(2,5-dihexyloxy-p-phenylenevinylene)-alt-(2,2‘-dihexyloxy-3,3‘-biphenylenevinylene)] (2), and poly[(2,5-dihexyloxy-p-phenylenevinylene)-alt-(2,2‘-biphenylenevinylene)] (3). Absorption spectra in dilute solution and solid states are very similar for 1−3, consistent with the absence of aggregation effects in their ground electronic states. Photoluminescence emission spectra showed substantial red shifts in the solid state relative to dilute solution phase spectra. Solution emission quantum yields ranged from 0.26 to 0.42. LEDs based on 1−3 gave blue-green emission with maxima in the 480−510 nm range. The similarity of the photoluminescence and electroluminescence spectra for the polymers is consistent with emission from the same or very similar excited-state species. For LEDs based upon the highest quantum efficiency photoluminescent emitter, 1, better luminance was achieved using PEDOT-PSS hole injection layers in double-layer LEDs than using PPV.

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Section: Resultsmentioning

confidence: 99%

“…1 2,5-Dihexyloxy-1,4-dicarboxylaldehyde (7). To a solution of 2,5-dihexyloxy-1,4-dibromobenzene 10 (3.50 g, 8.02 mmol) in diethyl ether (90 mL) was added 2.5 M butyllithium solution (8.05 mL) in hexane at 0 °C under nitrogen. It was stirred for 30 min and allowed to come to room temperature.…”

Section: 5′-bis(bromomethyl)-22′-dihexyloxy-11′-biphenyl (5b)mentioning

confidence: 99%

Synthesis and Luminescent Studies of Poly(phenylenevinylene)s Containing a Biphenyl Moiety

et al. 2001

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“…The copolymer with 2,5-dihexyloxysubstituted and unsubstituted phenylene moieties (Fig. 16) did not show stable electroluminescence as a single layer device sandwiched between ITO and Ca-electrodes [85]. However, a two layer device with a PPV layer (film thickness 30 nm) between the ITO-electrode and the PP layer (film thickness 200 nm) resulted in strong violet electroluminescence with a threshold voltage of 50 V. Dialkoxysubstituted PPPs showed polarized electroluminescence utilizing the Langmuir±Blodgett technique [86].…”

Section: Polymers With Arylene Vinylene Segments In the Side Chainmentioning

confidence: 93%

Design and synthesis of polymers for light-emitting diodes

Greiner

1998

Polym. Adv. Technol.

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Polymers with aromatic ϕ‐conjugated moieties were utilized as electroluminescent materials. In order to meet the requirements for light‐emitting diodes (LED), the design and synthesis of electroluminescent polymers had to be developed and viewed in this review. Focus is on polymers with arylene vinylene, arylene ethinylene, phenylene, thiophene and arylene amine moieties as light‐emitting, hole‐transporting and electron‐transporting materials in LED devices. An attempt has been made to arrange a structural classification of electroluminescent polymers in nonsegmented and segmented polymers. © 1998 John Wiley & Sons, Ltd.

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“…What is more, fluorene derivatives are good candidates for OLEDs due to their high fluorescence quantum efficiency, thermal stability and facile tuning at the C9 position. With these minds, we designed a series of phosphores cent polymers employing fluorene alt benzene deriv atives as the backbone, which is expected to adjust its solubility, thermal stability and luminescent properties of polymer [22][23][24][25]. At the same time, the iridium complex was introduced into the branch chain as the pendant to enhance the efficiency of OLEDs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optoelectric properties of fluorene-alt-benzene organic phosphorescent polymers containing pendent cyclometalated iridium complex

et al. 2014

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A series of novel phosphorescent polymers consisting of fluorene alt benzene as building block in the main chain and cyclometalated iridium complex as the pendent in the branch were synthesized by coupling polymerization. All of these resulting polymers presented a good thermal stability, an intense absorption in the region of 300-400 nm and a bright blue emission in solution. On contrary, the polymers exhibited dual emission spectra originated from the backbones and iridium complex unit in the neat film. Polymer organic light emitting diodes employing these polymers as the single emissive layer with the con figuration of ITO/PEDOT : PSS (50 nm)/phosphorescent polymer (45 nm)/LiF (0.5 nm)/Al (150 nm) were fabricated. The devices revealed a maximum brightness 43 cd/m 2 with a low molar concentration of iridium complex (1%).

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Synthesis of a polyphenylene light-emitting polymer

Cited by 41 publications

References 17 publications

Synthesis and Luminescent Studies of Poly(phenylenevinylene)s Containing a Biphenyl Moiety

Synthesis and Luminescent Studies of Poly(phenylenevinylene)s Containing a Biphenyl Moiety

Design and synthesis of polymers for light-emitting diodes

Synthesis and optoelectric properties of fluorene-alt-benzene organic phosphorescent polymers containing pendent cyclometalated iridium complex

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