3 results about "Polymer light emitting diodes" patented technology

The application discloses a kind of green processing type fluorene-sulfone conjugated polymer preparation and its application in polymer light-emitting diode (PLEDs) and pulse heartbeat detection, belong to organic photoelectric material and biosensing technology field.Specifically, the application will be monomer with fluorenyl monomer and sulfone monomer according to proportion Suzuki polymerization, build main chain with a certain proportion sulfone group fluorenyl conjugated polymer, with high fluorescence quantum efficiency, spectral stability and thin film uniformity, using green non-halogen solvent realizes the low toxicity of luminescent layer, environment-friendly processing, and then prepare printable PLEDs.The conjugated polymer synthesis route is simple, solution processing is good, device efficiency is high, spectral stability and no obvious roll-down, can be used as stable, uniform light source, successfully applied to human pulse heartbeat signal detection.

The invention provides a hyperbranched polybenzene, preparation method and use thereof. The method includes: under an inert gas atmosphere, a monomer with two internal acetylenyl groups undergoes polymerization reaction in a solvent in the presence of a catalyst to obtain the hyperbranched polybenzene. The monomer in the polymerization reaction is a monomer with internal acetylenyl groups, and the catalyst is a nonmetallic catalyst p-toluenesulfonic acid. The polymerization reaction has simple conditions, is convenient and environmentally friendly, and overcomes the problem that the catalyst residue caused by the use of metal catalyst in conventional cyclotrimerization reaction, which affects the polymer properties. Due to the typical aggregation-induced emission (AIE)-active tetraphenyl ethylene units, the tetraphenylethylene-containing hyperbranched polymers of the present invention has high fluorescence quantum yields in the aggregation state and has fully conjugated structures. The hyperbranched polybenzenes can be used as chemical sensors and have an application prospect for polymer light-emitting diodes.

The application belongs to the technical field of photoelectric devices, and discloses a two-component blue polymer light-emitting diode and a preparation method thereof. The two-component blue polymer light-emitting diode comprises a glass substrate, an anode layer, a hole injection layer, a light-emitting layer, an electron injection layer and a metal cathode, and the light-emitting layer is a two-component blue polyfluorene material thin film prepared by a spin coating method. One of the two-component blue polyfluorene materials is a polymer PFA-a (a=1~4) containing a styryl triphenylamine unit, and the other is a PFB-b (b=1~4) containing a 7H-benzo[b]benzo[5,6]fluorene[2,3-d]thiophene unit. By using the two-component polyfluorene material as the light-emitting layer, an effective energy transfer process between the two polymer materials is utilized, the exciton utilization rate in the device is significantly improved, and thus a blue PLED with a current efficiency as high as 7.30 cd A ‑1 is realized.