68results about How to "Effective doping" patented technology

The invention discloses glass powder and silver aluminum paste which comprises the glass powder and used on the positive side of an N-type double-sided solar cell. The silver aluminum paste comprisesconductive silver powder, silicon aluminum alloy powder, the glass powder and an organic carrier, wherein the glass powder is prepared from the following components in percentage by weight: 0-50% of PbO, 0-50% of BiO, 5-15% B2O3, 8-9% of SiO2, 2-3% of Al2O3 and 5-15% of ZnO; the mass ratio of silicon to aluminum in the glass powder is (4-5) to 1; the content of the conductive silver powder is 80wt% to 90wt%; the conductive silver powder comprises nano silver powder and silver alloy powder in a mass ratio of 1 to (18-90). The glass powder not only guarantees the corrosiveness of SiNx, but alsodoes not cause relatively strong metallized composition. The silver aluminum paste prepared by using the glass powder solves the problem of the contradiction between contact resistance and open circuit voltage when the silver aluminum paste is printed on the positive side of an N-type crystalline silicon solar cell.

The invention relates to a nano VO2 film with a superhydrophilic self-cleaning function and an intelligent temperature control function and a preparation method of the nano VO2 film. The preparation method of the nano VO2 film comprises the steps that firstly, a precursor solution of vanadium dioxide is prepared through a sol-gel method; then a substrate is evenly coated with the precursor solution; and finally one-step annealing is conducted, so that the nano VO2 film is obtained. A corresponding tungsten-doped VO2 film can be obtained by directly adding a tungsten source in the precursor solution, and the phase-change temperature can be adjusted to 32 DEG C; the crystal sizes of VO2 particles can be changed through tungsten ion doping, a certain micro-nano structure is formed on the surface of the substrate, and the superhydrophilic self-cleaning function at the water contact angle of 12 degrees is achieved; in addition, the difference of the light transmittance before the phase change and the light transmittance after the phase change of the film in the position with the visible light transmittance being 80% and the wavelength being 2000 nm is 26%, and an extremely good intelligent temperature control effect is achieved.