Light-emitting electrochemical cells with microsecond response times based on PPPs and novel PPVs

Tasch, S.; Holzer, L.; Wenzl, Franz P.; Gao, Jun; Winkler, Berthold; Dai, Liming; Mau, Albert W. H.; Sotgiu, R.; Sampietro, Marco; Scherf, Ullrich; Müllen, Kläus; Heeger, Alan J.; Leising, G.

doi:10.1016/s0379-6779(98)00229-x

Cited by 35 publications

(18 citation statements)

References 13 publications

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“…As noted earlier, [27] the device characteristics of the HMWPEO-based mLPPP LECs are therefore very similar to that of room-temperature frozen-junction LECs reported by Heeger and co-workers. [41] For these LECs, the crown ether diameter and the cation radius were chosen such that the cations are immobile at room temperature.…”

Section: Influence Of the Ionic Transport Numbersupporting

confidence: 84%

“…[23,24] This behavior was observed to be independent of the kind of anions investigated, LiCF 3 SO 3 and LiClO 4 . [27] This asymmetry is char- [27]) or DCH18C6 (solid line, see [26]) as a solid-state electrolyte. The inset shows the chemical structure of mLPPP.…”

Section: Optoelectronic Characterizationmentioning

confidence: 98%

“…This enrichment of mLPPP at the free surface may also be the reason for the observed fine surface morphology of HMWPEO-based mLPPP LECs. [27] As a result, in the case of the crown ether-based devices, the electrolyte is more homogeneously distributed in the direction perpendicular to the substrate surface, while HMWPEO obviously phase separates from mLPPP just in that direction (see Fig. 9).…”

Section: Full Papermentioning

confidence: 98%

“…In the earlier studies on the optoelectronic properties, the LECs with the best performances were obtained for a blend composition of mLPPP/HMWPEO/LiTf = 20:10:3±4 [23,24,27] and mLPPP/DCH18C6/LiTf = 20:20:4 by weight, [26] spin-cast from a cyclohexanone co-solution. Cyclohexanone is the favored choice, since all the components discussed below (mLPPP, DCH18C6, HMWPEO, and LiTf) can be separately dissolved in this solvent.…”

Section: Full Papermentioning

confidence: 99%

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The Influence of the Phase Morphology on the Optoelectronic Properties of Light‐Emitting Electrochemical Cells

Wenzl¹,

Pachler

Suess

et al. 2004

Adv Funct Materials

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We report on the morphological aspects of thin films prepared from a blue–green light‐emitting conjugated polymer, (methyl‐substituted ladder‐type poly(p‐phenylene, mLPPP)), blended with a solid‐state electrolyte composed either by a crown ether, dicyclohexano‐18‐crown‐6 (DCH18C6), or a high‐molecular‐weight poly(ethylene oxide) (HMWPEO), and a Li salt, lithium trifluoromethanesulfonate (LiCF3SO3, Li triflate (LiTf)), as they have been successfully applied in light‐emitting electrochemical cells (LECs). The surface morphologies of the blend layers were investigated using atomic force microscopy (AFM) in tapping mode, and the ion distribution was probed using X‐ray analysis by means of energy‐dispersive X‐ray spectrometry (EDXS) in the scanning electron microscope (SEM). We show that the two different phase‐separation processes, the complexation tendencies of the ionic species as well as the ionic transport numbers, have tremendous influence on the performances of the corresponding LECs, revealing either rectifying or symmetric optoelectronic characteristics in forward and reverse bias directions. This opens up new possibilities for tuning the optoelectronic properties of ion‐supported organic electronic devices.

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Section: Influence Of the Ionic Transport Numbersupporting

confidence: 84%

Section: Optoelectronic Characterizationmentioning

confidence: 98%

Section: Full Papermentioning

confidence: 98%

Section: Full Papermentioning

confidence: 99%

See 2 more Smart Citations

The Influence of the Phase Morphology on the Optoelectronic Properties of Light‐Emitting Electrochemical Cells

Wenzl¹,

Pachler

Suess

et al. 2004

Adv Funct Materials

Self Cite

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“…The introduction of substituents such as phenoxy groups at the bay or imide groups at the peri position allows control over the bandgap. A series of perylene dyes containing donor or acceptor substituents on the core (17)(18)(19) have been synthesized via a three-step reaction. [102,103] Depending on the D/A strength and the position of the substituents, the bandgap and thus the maximum of absorption can be successfully tuned from yellow to black.…”

Section: Perylene Dyes For Solar Cell Devicesmentioning

confidence: 99%

Polyphenylene‐Based Materials: Control of the Electronic Function by Molecular and Supramolecular Complexity

2009

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Organic electronics is one of the hottest and most exciting research topics today. However, its performance still lags behind that of inorganic‐based electronics. This Progress Report demonstrates that by controlling the complexity of organic molecules at the molecular and at the supramolecular level as well as by choosing suitable processing techniques, the desired function for applications in electronics can be achieved. Our main focus is on polyphenylene‐based nanomaterials, versatile organic molecules that allow access to novel intricate materials. We emphasize the molecular complexity as well as the supramolecular organization and the interfacing of novel organic materials as key guidelines.

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Charge Injection Mechanism in PLEDs and Charge Transport in Conjugated Polyelectrolytes

Zalar

Nguyen

2012

Conjugated Polyelectrolytes

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Light-emitting electrochemical cells with microsecond response times based on PPPs and novel PPVs

Cited by 35 publications

References 13 publications

The Influence of the Phase Morphology on the Optoelectronic Properties of Light‐Emitting Electrochemical Cells

The Influence of the Phase Morphology on the Optoelectronic Properties of Light‐Emitting Electrochemical Cells

Polyphenylene‐Based Materials: Control of the Electronic Function by Molecular and Supramolecular Complexity

Charge Injection Mechanism in PLEDs and Charge Transport in Conjugated Polyelectrolytes

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