Comment on "triplet-to-singlet exciton formation in poly(p-phenylene-vinylene) light-emitting diodes".

Hole blocking in carbon nanotube–polymer composite organic light-emitting diodes based on poly (m-phenylene vinylene-co-2, 5-dioctoxy-p-phenylene vinylene)

Singlet and triplet exciton formation rates in conjugated polymer light-emitting diodes

By applying a molecular orbital perturbation approach, we calculate the formation rates for singlet and triplet molecular excitons associated with intermolecular charge-transfer processes. It is found that the interchain bond-charge correlation has a strong influence on the relative probabilities for generating singlet and triplet excitons. Most importantly, application of our approach to a mod...

Poly(p-phenylene vinylene)/tris(8-hydroxy) quinoline aluminum heterostructure light emitting diode

Results are presented from polymer/molecular organic heterostructure light emitting diodes composed of a layer of the conjugated conducting polymer poly~p-phenylene vinylene! ~PPV!, and a layer of fluorescent molecular compound tris~8-hydroxy! quinoline aluminum ~Alq!. The external quantum efficiency of these heterostructure LEDs is ;0.1%, which is over one order of magnitude higher than that o...

Electric-field-induced optical second-harmonic generation in ž / poly phenylene vinylene light-emitting diodes

We demonstrate second-harmonic generation in polymeric light-emitting diodes built in a layer structure of indium tin Ž . oxide, poly phenylene vinylene and aluminum. The second-harmonic intensity generated in the active zone of the diode depends quadratically on the applied reverse bias. In order to account for the bias dependence of the measured intensity a simple model is given in that the s...

Enhanced brightness in organic light-emitting diodes using a carbon nanotube composite as an electron-transport layer

We have studied the effects of using a composite fabricated from carbon nanotubes and a host polymer, poly~m-phenylene-vinylene-co-2,5-dioctyloxy-p-phenylene-vinylene! ~PmPV!, as an electron-transport layer in organic light-emitting diodes. Double layer devices using this composite as an electron-transport layer, triple layer devices with a composite electron-transport layer, and poly~9-vinylca...