Room-temperature exciton storage in elongated semiconductor nanocrystals (2007)
Kraus, R.M., Lagoudakis, P.G., Rogach, A.L., Talapin, D.V., Weller, H., Lupton, J.M., ...
The excited state of colloidal nanoheterostructures consisting of a spherical CdSe nanocrystal with an epitaxially attached CdS rod can be perturbed effectively by electric fields. Field-induced...
Room-temperature exciton storage in elongated semiconductor nanocrystals (2007)
Kraus, R.M., Lagoudakis, P.G., Rogach, A.L., Talapin, D.V., Weller, H., Lupton, J.M., ...
The excited state of colloidal nanoheterostructures consisting of a spherical CdSe nanocrystal with an epitaxially attached CdS rod can be perturbed effectively by electric fields. Field-induced...
Room-temperature exciton storage in elongated semiconductor nanocrystals (2007)
Kraus, R.M., Lagoudakis, P.G., Rogach, A.L., Talapin, D.V., Weller, H., Lupton, J.M., ...
The excited state of colloidal nanoheterostructures consisting of a spherical CdSe nanocrystal with an epitaxially attached CdS rod can be perturbed effectively by electric fields. Field-induced...
Evidence for temperature tndependent triplet diffusion in a ladder type conjugated polymer (2006)
Reufer, M., Lagoudakis, P.G., Walter, M.J., Lupton, J.M., Feldmann, J., Scherf, U.
We study the temperature dependence of triplet formation and decay by considering the phosphorescence dynamics in a prototypical conjugated polymer matrix. The dynamics of triplet formation as a...
Muller, J., Lupton, J.M., Lagoudakis, P.G., Schindler, F., Koeppe, R., Rogach, A.L., ...
We explore two routes to wave function engineering in elongated colloidal CdSe/CdS quantum dots, providing deep insight into the intrinsic physics of these low-dimensional heterostructures. Varying...
Müller, J., Lupton, J.M., Lagoudakis, P.G., Schindler, F., Koeppe, R., Rogach, A.L., ...
We explore two routes to wave function engineering in elongated colloidal CdSe/CdS quantum dots, providing deep insight into the intrinsic physics of these low-dimensional heterostructures. Varying...
Interplay between auger and ionization processes in nanocrystal quantum dots (2005)
Kraus, R.M., Lagoudakis, P.G., Muller, J., Rogach, A.L., Lupton, J.M., Feldmann, J., ...
We study the interplay between Auger effects and ionization processes in the limit of strong electronic confinement in core/shell CdSe/ZnS semiconductor nanocrystal quantum dots. Spectrally resolved...
Müller, J., Lupton, J.M., Lagoudakis, P.G., Schindler, F., Koeppe, R., Rogach, A.L., ...
We explore two routes to wave function engineering in elongated colloidal CdSe/CdS quantum dots, providing deep insight into the intrinsic physics of these low-dimensional heterostructures. Varying...
Counting chromophores in conjugated polymers (2005)
Schindler,F., Jacob,J., Grimsdale,Andrew C., Scherf,Ullrich, Müllen,Klaus, Lupton,J. M., ...
Counting chromophores in conjugated polymers (2005)
Schindler, F., Jacob, J., Grimsdale, Andrew C., Scherf, Ullrich, Müllen, Klaus, Lupton, J. M., ...
Spin-conserving carrier recombination in conjugated polymers (2005)
Reufer, M., Walter, M.J., Lagoudakis, P.G., Hummel, B., Kolb, J.S., Roskos, H.G., ...
The ultimate efficiency of polymer light-emitting diodes is limited by the fraction of charges recombining in the molecular singlet manifold. We address the question of whether this fraction can...
Experimental evidence for exciton scaling effects in self-assembled molecular wires (2004)
Lagoudakis, P.G., De Souza, M.M., Schindler, F., Lupton, J.M., Feldmann, J., Wenus, J., ...
Resonant Rayleigh scattering from self-assembled one-dimensional molecular J-aggregate wires reveals a distinct dependence of the exciton energy on the width of lateral extension. For the J...
Low-threshold polymeric distributed feedback lasers with metallic contacts (2004)
Reufer, M., Riechel, S., Lupton, J.M., Feldmann, J., Lemmer, U., Schneider, D., ...
Optical losses in waveguides comprising metallic contacts are thought to be a major hurdle to the realization of organic laser diodes. We demonstrate here that careful tuning of the waveguide mode in...
Experimental evidence for exciton scaling effects in self-assembled molecular wires (2004)
Lagoudakis, P.G., De Souza, M.M., Schindler, F., Lupton, J.M., Feldmann, J., Wenus, J., ...
Resonant Rayleigh scattering from self-assembled one-dimensional molecular J-aggregate wires reveals a distinct dependence of the exciton energy on the width of lateral extension. For the J...
Lupton,J. M., Im,Chan, Bässler,H.
We present time resolved photoluminescence measurements on thin films of a phenyl-substituted poly(phenylene-vinylene) incorporated in a diode structure. Under reverse bias conditions rapid exciton...
We analyze the experimental dependence of temporally and spectrally resolved electroluminescence (EL) from polyfluorene-based light-emitting diodes on electric field and temperature. The blue band in...
Influence of dendronization on spectral diffusion and aggregation in conjugated polymers (2003)
Lupton,J. M., Schouwink,P., Keivanidis,P. E., Grimsdale,Andrew C., Müllen,Klaus
Dendronization has previously been suggested as a means of controlling the level of intermolecular interactions in macromolecular and polymeric compounds. We therefore studied the spectral relaxation...
Ex-situ infrared absorption spectroscopy was performed on electrochemically synthesised poly(3-alkylpyrroles) as a function of the alkyl chain length (poly(3-hexylpyrrole) or poly(3-decylpyrrole))...
Transient electroluminescence spectroscopy of polyfluorene light-emitting diodes (2003)
We present transient electroluminescence spectra of polyfluorene light-emitting diodes. The luminescence spectra recorded after switch-off of a 5 V driving pulse exhibit a dynamic change with time. A...
Ex-situ infrared absorption spectroscopy was performed on electrochemically synthesised poly(3-alkylpyrroles) as a function of the alkyl chain length (poly(3-hexylpyrrole) or poly(3-decylpyrrole))...
Influence of dendronization on spectral diffusion and aggregation in conjugated polymers (2003)
Lupton, J. M., Schouwink, P., Keivanidis, P. E., Grimsdale, Andrew C., Müllen, Klaus
Dendronization has previously been suggested as a means of controlling the level of intermolecular interactions in macromolecular and polymeric compounds. We therefore studied the spectral relaxation...
Transient electroluminescence spectroscopy of polyfluorene light-emitting diodes (2003)
We present transient electroluminescence spectra of polyfluorene light-emitting diodes. The luminescence spectra recorded after switch-off of a 5 V driving pulse exhibit a dynamic change with time. A...
Nikitenko, V. R., Lupton, J. M.
We analyze the experimental dependence of temporally and spectrally resolved electroluminescence (EL) from polyfluorene-based light-emitting diodes on electric field and temperature. The blue band in...
Lupton, J. M., Im, Chan, Bässler, H.
We present time resolved photoluminescence measurements on thin films of a phenyl-substituted poly(phenylene-vinylene) incorporated in a diode structure. Under reverse bias conditions rapid exciton...
The effect of core delocalization on intermolecular interactions in conjugated dendrimers (2003)
Beavington, R., Frampton, M. J., Lupton, J. M., Burn, P. L., Samuel, I. D. W.
Four generations of conjugated dendrimers that contain 1,3,5-tris(distyrylbenzenyl)benzene cores, stilbene dendrons, and t-butyl surface groups have been synthesized. The dendrimers were synthesized...
Bright electroluminescence from a new conjugated dendrimer (2003)
Ma, Dongge, Hu, Yufeng, Zhang, Yanguang, Wang, Lixiang, Jing, Xiabing, Wang, Fosong, ...
Photoluminescence and electroluminescence from a new conjugated dendrimer consisting of three distyrylbenzene units linked by a central nitrogen atom as core and meta-linked biphenyl units as...
The effect of core delocalization on intermolecular interactions in conjugated dendrimers (2003)
Beavington, R., Frampton, M. J., Lupton, J. M., Burn, P. L., Samuel, I. D. W.
Four generations of conjugated dendrimers that contain 1,3,5-tris(distyrylbenzenyl)benzene cores, stilbene dendrons, and t-butyl surface groups have been synthesized. The dendrimers were synthesized...
Bright electroluminescence from a new conjugated dendrimer (2003)
Ma, Dongge, Hu, Yufeng, Zhang, Yanguang, Wang, Lixiang, Jing, Xiabing, Wang, Fosong, ...
Photoluminescence and electroluminescence from a new conjugated dendrimer consisting of three distyrylbenzene units linked by a central nitrogen atom as core and meta-linked biphenyl units as...
Martin,S. J., Lupton,J. M., Samuel,I. D. W., Walker,A. B.
We present results from a device model in which the current- voltage (I-V) characteristics of an ITO/MEH-PPV/Al organic light emitting device have been simulated over a range of temperatures by...
Origin of spectral broadening in pi-conjugated amorphous semiconductors (2002)
Lupton,J. M., Samuel,I. D. W., Burn,P. L.
We present a study of the picosecond fluorescence dynamics of pi-conjugated semiconducting organic dendrimers in the solid state. By varying the degree of branching within the dendrons, referred to...
Intrinsic room-temperature electrophosphorescence from a pi- conjugated polymer (2002)
Lupton,J. M., Pogantsch,A., Piok,T., List,E. J. W., Patil,S., Scherf,Ullrich
Electrically induced phosphorescence from a poly(para- phenylene) ladder-type polymer is observed for the first time and characterized using time resolved spectroscopy. Short-lived phosphorescence is...
Palsson, L. O., Beavington, R., Frampton, M. J., Lupton, J. M., Magennis, S. W., Markham, J. P. J., ...
An efficient strategy has been developed for the preparation of four generations of electroluminescent dendrimers that contain tris(distyrylbenzenyl)amine cores, stilbene dendrons, and tert-butyl...
Hot band emission and energy transfer in organic electrophosphorescent devices (2002)
The evolution of the electroluminescence spectra of platinum porphyrin doped polyfluorene light-emitting diodes is investigated after turn-off of the driving pulse. In the delayed spectra a new...
Nonequilibrium polariton dynamics in organic microcavities (2002)
Schouwink,P., Lupton,J. M., Von Berlepsch,H., Dähne,L., Mahrt,R. F.
Microcavities containing a J-aggregate forming organic dye were prepared in the strong-coupling regime. Changing the position of the neat organic films within the microcavity allows a tuning of the...
Control of intrachromophore excitonic coherence in electroluminescent conjugated dendrimers (2002)
Lupton,J. M., Samuel,I. D. W., Burn,P. L., Mukamel,S.
We present coupled electronic oscillator calculations on conjugated dendrimers that can be used in organic light- emitting diodes. The results indicate that the nature of the excited state in these...
Im,Chan, Lupton,J. M., Schouwink,P., Heun,S., Becker,H., Bässler,H.
Steady state as well as time-resolved fluorescence of phenyl- substituted polyphenylenevinylene (PhPPV), both in solution and in form of spin-coated films has been measured. In solution the...
On-chain defect emission in electroluminescent polyfluorenes (2002)
Lupton,J. M., Craig,M. R., Meijer,E. W.
We present time-resolved photoluminescence measurements on a range of poly- and oligofluorenes with different molecular weights in both dilute solution and thin films. The commonly observed parasitic...
We present time-gated electroluminescence (EL) spectroscopy of a polyfluorene-based conjugated polymer. The technique is shown to be sensitive enough to pick out impurity emission orders of magnitude...
On-chain defect emission in electroluminescent polyfluorenes (2002)
Lupton, J. M., Craig, M. R., Meijer, E. W.
We present time-resolved photoluminescence measurements on a range of poly- and oligofluorenes with different molecular weights in both dilute solution and thin films. The commonly observed parasitic...
Martin, S. J., Lupton, J. M., Samuel, I. D. W., Walker, A. B.
We present results from a device model in which the current- voltage (I-V) characteristics of an ITO/MEH-PPV/Al organic light emitting device have been simulated over a range of temperatures by...
Origin of spectral broadening in pi-conjugated amorphous semiconductors (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L.
We present a study of the picosecond fluorescence dynamics of pi-conjugated semiconducting organic dendrimers in the solid state. By varying the degree of branching within the dendrons, referred to...
On-chain chemical defects have recently been identified as the source of broad, low-energy emission features in polyfluorenes. By considering the evolution of the time-resolved luminescence spectrum...
We present time-gated electroluminescence (EL) spectroscopy of a polyfluorene-based conjugated polymer. The technique is shown to be sensitive enough to pick out impurity emission orders of magnitude...
Frequency up-conversion as a temperature probe of organic opto- electronic devices (2002)
Frequency up-conversion is demonstrated in a polyfluorene-based conjugated polymer. Up-converted emission is observed upon excitation to the red of the 0-0 luminescence band. The emission intensity...
Intrinsic room-temperature electrophosphorescence from a pi- conjugated polymer (2002)
Lupton, J. M., Pogantsch, A., Piok, T., List, E. J. W., Patil, S., Scherf, Ullrich
Electrically induced phosphorescence from a poly(para- phenylene) ladder-type polymer is observed for the first time and characterized using time resolved spectroscopy. Short-lived phosphorescence is...
Nonequilibrium polariton dynamics in organic microcavities (2002)
Schouwink, P., Lupton, J. M., Von Berlepsch, H., Dähne, L., Mahrt, R. F.
Microcavities containing a J-aggregate forming organic dye were prepared in the strong-coupling regime. Changing the position of the neat organic films within the microcavity allows a tuning of the...
A molecular thermometer based on long-lived emission from platinum octaethyl porphyrin (2002)
A highly sensitive molecular thermometer based on platinum octaethyl porphyrin, which can be employed in a range of environments, is presented. The thermal activation of the emission spectrum results...
Hot band emission and energy transfer in organic electrophosphorescent devices (2002)
The evolution of the electroluminescence spectra of platinum porphyrin doped polyfluorene light-emitting diodes is investigated after turn-off of the driving pulse. In the delayed spectra a new...
Control of intrachromophore excitonic coherence in electroluminescent conjugated dendrimers (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L., Mukamel, S.
We present coupled electronic oscillator calculations on conjugated dendrimers that can be used in organic light- emitting diodes. The results indicate that the nature of the excited state in these...
Im, Chan, Lupton, J. M., Schouwink, P., Heun, S., Becker, H., Bässler, H.
Steady state as well as time-resolved fluorescence of phenyl- substituted polyphenylenevinylene (PhPPV), both in solution and in form of spin-coated films has been measured. In solution the...
Control of intrachromophore excitonic coherence in electroluminescent conjugated dendrimers (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L., Mukamel, S.
We present coupled electronic oscillator calculations on conjugated dendrimers that can be used in organic light-emitting diodes. The results indicate that the nature of the excited state in these...
Novel heterolayer organic light-emitting diodes based on a conjugated dendrimer (2002)
Ma, D. G., Lupton, J. M., Beavington, R., Burn, P. L., Samuel, I. D. W.
We demonstrate a novel organic light-emitting diode (LED) heterolayer structure that contains a conjugated dendrimer as the light-emitting molecule. The LED was prepared by spin-coating two dendrimer...
Bright electroluminescence from a conjugated dendrimer (2002)
Ma, Dongge Ma, Lupton, J. M., Samuel, I. D. W., Lo, Shi-Chun, Burn, P. L.
Photoluminescence and electroluminescence (EL) from a conjugated dendrimer consisting of three distyrylbenzene units linked by a central nitrogen atom as core and meta-linked biphenyl units as...
Palsson, L. O., Beavington, R., Frampton, M. J., Lupton, J. M., Magennis, S. W., Markham, J. P. J., ...
An efficient strategy has been developed for the preparation of four generations of electroluminescent dendrimers that contain tris(distyrylbenzenyl)amine cores, stilbene dendrons, and tert-butyl...
Origin of spectral broadening in pi-conjugated amorphous semiconductors (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L., Murphy, Craig
We present a study of the picosecond fluorescence dynamics of pi-conjugated semiconducting organic dendrimers in the solid state. By varying the degree of branching within the dendrons, referred to...
Dongge, M., Lupton, J. M., Beavington, R., Burn, P. L., Samuel, I. D. W.
In this paper, we study the effects of electrical annealing at different voltages on the performance of organic light-emitting diodes. The light-emitting diodes studied here are single-layer devices...
Exciton confinement in organic dendrimer quantum wells for opto-electronic applications (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L., Mukamel, S.
Organic dendrimers are a fascinating new class of materials for opto-electronic applications. We present coupled electronic oscillator calculations on novel nanoscale conjugated dendrimers for use in...
Control of intrachromophore excitonic coherence in electroluminescent conjugated dendrimers (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L., Mukamel, S.
We present coupled electronic oscillator calculations on conjugated dendrimers that can be used in organic light-emitting diodes. The results indicate that the nature of the excited state in these...
Novel heterolayer organic light-emitting diodes based on a conjugated dendrimer (2002)
Ma, D. G., Lupton, J. M., Beavington, R., Burn, P. L., Samuel, I. D. W.
We demonstrate a novel organic light-emitting diode (LED) heterolayer structure that contains a conjugated dendrimer as the light-emitting molecule. The LED was prepared by spin-coating two dendrimer...
Bright electroluminescence from a conjugated dendrimer (2002)
Ma, Dongge Ma, Lupton, J. M., Samuel, I. D. W., Lo, Shi-Chun, Burn, P. L.
Photoluminescence and electroluminescence (EL) from a conjugated dendrimer consisting of three distyrylbenzene units linked by a central nitrogen atom as core and meta-linked biphenyl units as...
Palsson, L. O., Beavington, R., Frampton, M. J., Lupton, J. M., Magennis, S. W., Markham, J. P. J., ...
An efficient strategy has been developed for the preparation of four generations of electroluminescent dendrimers that contain tris(distyrylbenzenyl)amine cores, stilbene dendrons, and tert-butyl...
Origin of spectral broadening in pi-conjugated amorphous semiconductors (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L.
We present a study of the picosecond fluorescence dynamics of pi-conjugated semiconducting organic dendrimers in the solid state. By varying the degree of branching within the dendrons, referred to...
Dongge, M., Lupton, J. M., Beavington, R., Burn, P. L., Samuel, I. D. W.
In this paper, we study the effects of electrical annealing at different voltages on the performance of organic light-emitting diodes. The light-emitting diodes studied here are single-layer devices...
Exciton confinement in organic dendrimer quantum wells for opto-electronic applications (2002)
Lupton, J. M., Samuel, I. D. W., Burn, P. L., Mukamel, S.
Organic dendrimers are a fascinating new class of materials for opto-electronic applications. We present coupled electronic oscillator calculations on novel nanoscale conjugated dendrimers for use in...
Structure-property relationships in conjugated molecules (2001)
Burn, P. L., Beavington, R., Frampton, M. J., Pillow, J. N. G., Halim, M., Lupton, J. M., ...
Conjugated dendrimers are ideal materials to study the structure-property relationships in conjugated molecules. We have developed a family of dendrimers that contain t-butyl surface groups, stilbene...
Control of electrophosphorescence in conjugated dendrimer light-emitting diodes (2001)
Lupton, J. M., Samuel, I. D. W., Frampton, M. J., Beavington, R., Burn, P. L.
We present a novel platinum porphyrin based phosphorescent dendrimer for use as a triplet harvesting dopant in organic light-emitting diodes. Two types of dendritic host materials are used. Through...
Lupton, J. M., Samuel, I. D. W., Beavington, R., Burn, P. L., Bassler, H.
A novel family of conjugated dendrimers is used as model compounds to explore the effect of intermolecular interactions on photophysical and transport properties. The Figure shows the third...
Control of mobility in molecular organic semiconductors by dendrimer generation (2001)
Lupton, J. M., Samuel, I. D. W., Beavington, R., Frampton, M. J., Burn, P. L., Bassler, H.
Conjugated dendrimers are of interest as novel materials for light-emitting diodes. They consist of a luminescent chromophore at the core with highly branched conjugated dendron sidegroups. In these...
The optoelectronic properties of electroluminescent dendrimers (2001)
Frampton, M. J., Beavington, R., Lupton, J. M., Samuel, I. D. W., Burn, P. L.
Dendrimers can be used as the emissive layer in organic light-emitting diodes. We have synthesised conjugated dendrimers containing meta-linked stilbene dendrons and luminescent porphyrin or...
Charge transport in conjugated dendrimers for light-emitting diodes (2001)
Lupton, J. M., Samuel, I. D. W., Beavington, R., Burn, P. L., Bassler, H.
We report a study on a novel family of conjugated dendrimers suitable for organic electroluminescence applications. By increasing the branching of the dendrimer, the separation between adjacent cores...
Lupton, J. M., Samuel, I. D. W., Beavington, R., Burn, P. L., Bassler, H.
The effect of intermolecular interactions on the properties of organic semiconductors is investigated using a family of conjugated dendrimers as model systems. Increasing the amount of branching, or...
Structure-property relationships in conjugated molecules (2001)
Burn, P. L., Beavington, R., Frampton, M. J., Pillow, J. N. G., Halim, M., Lupton, J. M., ...
Conjugated dendrimers are ideal materials to study the structure-property relationships in conjugated molecules. We have developed a family of dendrimers that contain t-butyl surface groups, stilbene...
Control of electrophosphorescence in conjugated dendrimer light-emitting diodes (2001)
Lupton, J. M., Samuel, I. D. W., Frampton, M. J., Beavington, R., Burn, P. L.
We present a novel platinum porphyrin based phosphorescent dendrimer for use as a triplet harvesting dopant in organic light-emitting diodes. Two types of dendritic host materials are used. Through...
Lupton, J. M., Samuel, I. D. W., Beavington, R., Burn, P. L., Bassler, H.
A novel family of conjugated dendrimers is used as model compounds to explore the effect of intermolecular interactions on photophysical and transport properties. The Figure shows the third...
Control of mobility in molecular organic semiconductors by dendrimer generation (2001)
Lupton, J. M., Samuel, I. D. W., Beavington, R., Frampton, M. J., Burn, P. L., Bassler, H.
Conjugated dendrimers are of interest as novel materials for light-emitting diodes. They consist of a luminescent chromophore at the core with highly branched conjugated dendron sidegroups. In these...
The optoelectronic properties of electroluminescent dendrimers (2001)
Frampton, M. J., Beavington, R., Lupton, J. M., Samuel, I. D. W., Burn, P. L.
Dendrimers can be used as the emissive layer in organic light-emitting diodes. We have synthesised conjugated dendrimers containing meta-linked stilbene dendrons and luminescent porphyrin or...
Charge transport in conjugated dendrimers for light-emitting diodes (2001)
Lupton, J. M., Samuel, I. D. W., Beavington, R., Burn, P. L., Bassler, H.
We report a study on a novel family of conjugated dendrimers suitable for organic electroluminescence applications. By increasing the branching of the dendrimer, the separation between adjacent cores...
Lupton, J. M., Samuel, I. D. W., Beavington, R., Burn, P. L., Bassler, H.
The effect of intermolecular interactions on the properties of organic semiconductors is investigated using a family of conjugated dendrimers as model systems. Increasing the amount of branching, or...