Abstract

The present disclosure discloses a lithium-tellurium silicon-lead bismuth multi-component glass-oxide-complex system and conductive paste containing same, belonging to the technical field of solar cells. According to the present disclosure, a “functional modularization” strategy is adopted in a formula design of the glass-oxide-complex system, and glass oxide systems with selective reactivity for different passivation layers are compounded based on the structures, compositions and thicknesses of the passivation layers, so that a paste formula is developed, which is composed of lithium-containing, tellurium-silicon-containing and lead-containing glass oxides. Due to adoption of the modularized formula strategy, active ingredients can be better controlled, and the overall paste formula is more optimized, so that the laminated passivation layers can be selectively burned through to obtain a more balanced contact, and better battery performance on silicon wafers with different passivation layer thicknesses can be achieved, thus achieving excellent photoelectric conversion efficiency.

IPC Classes  ?

• H01B 1/16 - Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
• C03C 3/07 - Glass compositions containing silica with less than 40% silica by weight containing lead

Abstract

The present disclosure discloses a ceramic glass powder and a solar cell metallization paste containing the ceramic glass powder, and belongs to the technical field of solar cells. The present disclosure provides a novel formula mode of a glass powder including a crystallization nucleus component and a glass network component, that is, a formula of a ceramic glass powder that has a special crystallization behavior, a low crystallinity before sintering and a high crystallinity after the sintering, and a conductive metallization paste containing the ceramic glass powder is further obtained. The present disclosure solves the technical problem that by using metallization pastes in the prior art, a balance between corrosion of a silicon wafer and an ohmic contact is difficult to achieve. The efficiency of a solar cell is improved.

IPC Classes  ?

• C03C 8/12 - Frit compositions, i.e. in a powdered or comminuted form containing lead containing titanium or zirconium
• H01L 31/0224 - Electrodes
• C03C 8/10 - Frit compositions, i.e. in a powdered or comminuted form containing lead
• C03C 8/18 - Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill additions containing free metals
• C03C 4/14 - Compositions for glass with special properties for electro-conductive glass
• C03C 8/16 - Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill additions with vehicle or suspending agents, e.g. slip
• C03C 3/074 - Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

x, and M is one or a mixture of Na, K, Mg, Ca, Sr, Ti, V, Cr, Mo, W, Mn, Cu, Ag, Zn, Cd, B, Al, Ga, Tl, Ge, Pb, P, and Bi. There is no need to add additional surfactants, a viscosity change of the conductive paste prepared after standing for 30 days is less than 20%, the conductive paste has good stability, the water related weight loss of inorganic oxide of the conductive paste is less than 1.6%, and the application performance of the conductive paste is not affected after standing for 30 days.

IPC Classes  ?

• C03C 8/12 - Frit compositions, i.e. in a powdered or comminuted form containing lead containing titanium or zirconium
• C03C 8/10 - Frit compositions, i.e. in a powdered or comminuted form containing lead
• C03C 3/062 - Glass compositions containing silica with less than 40% silica by weight
• H01L 31/0216 - Coatings
• C03C 3/07 - Glass compositions containing silica with less than 40% silica by weight containing lead
• C03C 3/12 - Silica-free oxide glass compositions

Abstract

3 at the same time, the prepared frit has greater water resistance, and therefore, a solar cell prepared by using the conductive paste containing glass has good water resistance. In addition, the photoelectric conversion efficiency of the solar cell prepared by using the conductive paste prepared in the present disclosure can also be maintained, or even be slightly improved.

IPC Classes  ?

• C03C 8/10 - Frit compositions, i.e. in a powdered or comminuted form containing lead
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details
• C03C 4/14 - Compositions for glass with special properties for electro-conductive glass
• H01L 31/0224 - Electrodes

Abstract

The present disclosure discloses a lithium and tellurium-silicate binary glass-oxide-complex system and a conductive paste containing the complex system, and belongs to the technical field of solar cells. The present disclosure uses a “functional modularity” strategy in the formula design of a glass-oxide-complex system (GOC). Alkali metal ions with high migration and reactivity are separated from a glass body with high fluidity, thus a binary complex system is constructed, that is, a lithium-containing glass-oxide-complex (Li-GOC) with high activity and a tellurium-silica-containing glass-oxide-complex (Si—Te-GOC) with high fluidity. Through the modularized formula strategy, active ingredients can be better controlled, so as to obtain more balanced contact and open circuit voltage and improve the photoelectric conversion efficiency of a solar cell.

IPC Classes  ?

• C03C 8/10 - Frit compositions, i.e. in a powdered or comminuted form containing lead
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details
• H01L 31/0224 - Electrodes