5 results about "Polymer light emitting diodes" patented technology

The invention discloses an intrinsic flexible polymer composite light-emitting film and application thereof in an intrinsic flexible polymer light-emitting diode. The intrinsic flexible polymer composite luminescent film is prepared from a blend of a luminescent conjugated polymer and an elastomer dopant, and the elastomer dopant is polycaprolactone polyurethane or thermoplastic polyurethane obtained by block copolymerization of polycaprolactone diol and 4, 4-diphenylmethane diisocyanate. The maximum brightness of a PLED prepared by using the polymer composite light-emitting film as a light-emitting layer reaches 21072Cd / m < 2 >, the turn-on voltage is 2.7 V, and the polymer composite light-emitting film also has good performance stability and is easy to process and prepare in a large area. The polymer composite light-emitting film is applied to an IFPLED, the maximum brightness is 1621Cd / m < 2 >, the turn-on voltage is 4V, meanwhile, a 4 * 6 light-emitting display array is prepared, good uniformity is shown, and it is proved that the IFPLED has wide application prospects in the emerging science and technology field of intrinsic flexible display in the future.

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 invention discloses a low-roughness AgNW electrode based on an electronic jet printing process and application of the low-roughness AgNW electrode in an intrinsic flexible polymer light-emitting diode. The preparation method of the AgNW film electrode provided by the invention comprises the following step of carrying out patterning printing on AgNW ink on a substrate by adopting an electric jet printing method. According to the large-area intrinsic flexible AgNW electrode thin film with high stretchability, high conductivity, low roughness and low resistance, the stretch rate reaches 100%, the roughness is as low as 5.50 nm, an intrinsic flexible polymer light-emitting diode prepared based on the electrode has a turn-on electrode of 6.5 V and the maximum brightness of 763Cd / m < 2 >, and the device has the advantages of high brightness, high stretchability, high electrical conductivity, high reliability and the like. And the film has good performance stability, transparency and excellent tensile strain resistance.

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.