摘要:
This invention provides a dielectric composition comprising a dielectric which is fireable in air at a temperature in the range of about 450°C to about 550°C and a conductive oxide selected from the group consisting of antimony-doped tin oxide, tin-doped indium oxide, a transition metal oxide which has mixed valence states or will form mixed valence states after firing in a nitrogen atmosphere at a temperature in the range of about 450°C to about 550°C and normally conducting precious metal oxides such as ruthenium dioxide, wherein the amount of conductive oxide present is from about 0.25 wt % to about 25 wt % of the total weight of dielectric and conductive oxide. This dielectric composition has reduced electrical resistance and is useful in electron field emission devices to eliminate charging of the dielectric in the vicinity of the electron emitter and the effect of static charge induced field emission.
摘要:
The present invention provides a thick-film paste for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal, and a lead-tellurium-lithium-titanium-oxide dispersed in an organic medium.
摘要:
A process for the production of a MWT silicon solar cell comprising the steps: (1) providing a p-type silicon wafer with (i) holes forming vias between the front-side and the back-side of the wafer and (ii) an n-type emitter extending over the entire front-side and the inside of the holes, (2) applying a conductive metal paste to the holes of the silicon wafer to provide at least the inside of the holes with a metallization, (3) drying the applied conductive metal paste, and (4) firing the dried conductive metal paste, whereby the wafer reaches a peak temperature of 700 to 900°C, wherein the conductive metal paste has no or only poor fire-through capability and comprises (a) at least one particulate electrically conductive metal selected from the group consisting of silver, copper and nickel and (b) an organic vehicle.
摘要:
An aluminum paste comprising particulate aluminum, an organic vehicle and glass frit selected from (i) lead-free glass frits with a softening point temperature in the range of 550 to 611°C and containing 11 to 33 wt.-% of SiO 2 , >0 to 7 wt.-% of AI 2 O 3 and 2 to 10 wt.-% of B 2 O 3 and (ii) lead-containing glass frits with a softening point temperature in the range of 571 to 636°C and containing 53 to 57 wt.-% of PbO, 25 to 29 wt.-% of SiO 2 , 2 to 6 wt.-% of AI 2 O 3 and 6 to 9 wt.-% of B 2 O 3 , useful in the production of aluminum back electrodes of PERC silicon solar cells.
摘要:
This invention is directed to a glass composition comprising, in mole %, 2-7% M, wherein M is selected from an oxide of the group of alkali elements and mixtures thereof, 46-66% SiO2, 4-9% Al2O3, 5-9% B2O3, 0.5-7% MgO, 1-6% SrO and 11-21% CaO wherein the molar ratio of SrO/(MgO + CaO) is between 0.06 and 0.45. The invention is further directed to the use of the composition in low temperature co-fired ceramic tapes.
摘要:
A process for the formation of an electrically conductive silver back electrode of a PERC silicon solar cell comprising the steps: (1) providing a silicon wafer having an ARC layer on its front-side and a perforated dielectric passivation layer on its back-side, (2) applying and drying a silver paste to form a silver back electrode pattern on the perforated dielectric passivation layer on the back-side of the silicon wafer, and (3) firing the dried silver paste, whereby the wafer reaches a peak temperature of 700 to 900°C, wherein the silver paste has no or only poor fire-through capability and comprises particulate silver and an organic vehicle.
摘要:
A conductive paste composition contains a source of an electrically conductive metal, a lead-tellurium-based oxide, a discrete oxide of an adhesion promoting element, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and lead-tellurium-based oxide.
摘要:
A screen-printable thick film paste composition suitable for forming conductive patterns on a rigid substrate comprising: (a) finely divided particles of a lead-free glass composition having a softening point log (eta) = 7.6 poise from 400C-650C, a log (eta) specific viscosity in a range from 2 at 500C to 5 at 700C and consisting essentially of, by weight 65-95 % Bi2O3, 2-15 % SiO2, 0.1-9 % B2O3, 0-5 % Al2O3, 0-5 % CaO, and 0-20 % ZnO; and (b) electrically conductive particles; and all of (a) and (b) being dispersed in (c) an organic medium.
摘要:
The present invention provides a thick-film paste for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal, and a lead-tellurium-lithium-oxide dispersed in an organic medium.
摘要:
The present invention provides a thick-film paste for printing the front-side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal, and a lead-tellurium-oxide dispersed in an organic medium.