4results about How to "Reduce laser power" patented technology

The application relates to the technical field of solar cells, and particularly discloses a solar cell and a preparation method thereof. The solar cell comprises a silicon substrate, the silicon substrate comprises a front surface and a back surface, the front surface comprises a first laser contact area, a second laser contact area and a third laser contact area, the first laser contact area and the third laser contact area are alternately and spacedly arranged on the front surface of the silicon substrate; the second laser contact area and the first laser contact area are overlapped in a vertical direction, the width of the second laser contact area is smaller than that of the first laser contact area, the front surface further comprises a front surface metal electrode, the front surface metal electrode is in contact with the second laser contact area, and the crystallization rate of the second laser contact area is higher than that of a non-overlapping area in the first laser contact area. The solar cell has the advantages that the contact resistance of the metal grid line is reduced through gradient crystallization treatment, filling gain is brought, and the photoelectric conversion efficiency of the solar cell is further improved.

The application discloses a preparation method and application of an aggregation-induced emission material with multi-photon absorption properties, and a structural formula of the aggregation-induced emission material is shown as formula I or formula II: wherein R1 and R2 are each independently represented as: the application constructs a series of aggregation-induced emission molecules based on a pyrazine [2,3-g] quinoxaline structural unit, the molecules have strong intramolecular charge transfer characteristics, triphenylamine as an electron donor has a large absorption cross section, so that the material has the multi-photon absorption properties. The molecules have strong absorption and high quantum yield in the wavelength range of 400-700 nm, and show good photodynamic activity. The molecules have the characteristics of simple structure, easy modification, adjustable performance and easy preparation, and have good application prospects in the aspect of multi-photon fluorescence imaging.

The invention relates to the technical field of welding devices, in particular to an automatic aligning steel fireproof door welding device which comprises a supporting table and further comprises a butt joint mechanism and a welding mechanism, and the butt joint mechanism is arranged on the supporting table and used for automatically aligning and splicing the long edges and the short edges of a fireproof door frame; the welding mechanism comprises a transverse moving part, a longitudinal moving part, a carrier block, a laser head, a movable block, a motor a, a telescopic component b, a nut block b, a screw rod b and a discharging box. The longitudinal moving part is slidably arranged on the supporting table; the transverse moving part is arranged on the longitudinal moving part; the carrier block is connected with the transverse moving part; the telescopic part b is arranged on the carrier block and is connected with the movable block; the screw rod b is rotationally connected with the movable block; the motor a is arranged on the movable block, and the output end of the motor a is connected with the screw b; the nut block b is in threaded connection with the screw rod b; the laser head is connected with the nut block b; the discharging box is connected with the movable block. According to the invention, the problem of incomplete penetration caused by insufficient laser energy is fundamentally solved, and meanwhile, the required laser power is reduced.

The invention discloses a vagus nerve double-targeting delivery carrier as well as a preparation method and application thereof. According to the vagus nerve double-targeting delivery carrier, the surface of a nano carrier is simultaneously modified with a first targeting ligand capable of being combined with a nicotinic acetylcholine receptor on the surface of vagus nerve cells and a second targeting ligand capable of being specifically combined with a transient receptor potential channel. The enrichment efficiency and the spatial selectivity of the photoresponse nano-carrier in the vagus nerve area are effectively improved through a targeting delivery strategy of lymphatic path guidance and double receptor molecule recognition, the specific targeting of the photoresponse nano-carrier to the vagus nerve is enhanced, and in the follow-up NIR light irradiation process, the photoresponse nano-carrier has a good application prospect. Effective activation of the vagus nerve can be realized under lower optical power density, non-specific stimulation to surrounding non-target tissues is remarkably reduced, and safety and accuracy of light regulation of the vagus nerve are improved.