Heraeus Precious Metals North America Conshohocken LLC
대리인 / 주소
Blank Rome LLP
인용정보
피인용 횟수 :
0인용 특허 :
49
초록▼
Formulations and methods of making solar cells are disclosed. In general, the invention presents a solar cell contact made from a mixture wherein the mixture comprises a solids portion and an organics portion, wherein the solids portion comprises from about 85 to about 99 wt % of a metal component,
Formulations and methods of making solar cells are disclosed. In general, the invention presents a solar cell contact made from a mixture wherein the mixture comprises a solids portion and an organics portion, wherein the solids portion comprises from about 85 to about 99 wt % of a metal component, and from about 1 to about 15 wt % of a lead-free glass component. Both front contacts and back contacts arc disclosed.
대표청구항▼
1. A solar cell comprising a contact prepared by a mixture, wherein, prior to firing, the mixture comprises: a. a solids portion andb. an organics portionc. wherein the solids portion comprises: i. from about 85 to about 99 wt. % of a conductive metal component comprising silver, andii. from about 1
1. A solar cell comprising a contact prepared by a mixture, wherein, prior to firing, the mixture comprises: a. a solids portion andb. an organics portionc. wherein the solids portion comprises: i. from about 85 to about 99 wt. % of a conductive metal component comprising silver, andii. from about 1 to about 15 wt % of a glass component, wherein the glass component is lead-free and comprises (a) 50 to 80 mol % of Bi2O3, (b) SiO2 and (c) V2O5. 2. The solar cell of claim 1, wherein the glass component further comprises about 1 to about 20 mol % of a trivalent oxide of an element selected from the group consisting of Al, B, La, Y, Ga, In, Ce, and Cr. 3. The solar cell of claim 1, wherein the glass component further comprises about 0.1 to about 15 mol % of a tetravalent oxide of an element selected from the group consisting of Ti, Zr and Hf. 4. The solar cell of claim 1, wherein the glass component further comprises about 0.1 to about 20 mol % of a pentavalent oxide of an element selected from the group consisting of P, Ta, Nb. and Sb. 5. The solar cell of claim 1, wherein the glass component further comprises about 0.1 to about 25 mol % of an alkali oxide. 6. The solar cell of claim 1, wherein the glass component further comprises about 0.1 to about 20 mol % of an alkaline earth oxide. 7. The solar cell of claim 1, wherein the glass component further comprises about 0.1 to about 2.5 mol % of ZnO. 8. The solar cell of claim 1, wherein the glass component further comprises about 0.1 to about 12 ml % Ag2O. 9. The solar cell of claim 1, wherein the solids portion further comprises a crystalline additive selected from the group consisting of Sb2O3, In2O3, Ga2O3, SnO, ZnO, ZrO2, Al2O3, B2O3, Ta2O5, 12Bi2O3.SiO2, 2Bi2O3.SiO2, 3Bi2O3.5SiO2, Bi2O3.4SiO2, 6Bi2O3.SiO2, Bi2O3.SiO2, 2Bi2O3.3SiO2, Bi2O3.2TiO2, 2Bi2O3.3TiO2, 2Bi2O3.4TiO2, and 6Bi2O3.TiO2, 6Bi2O3.V2O5, BiVO4.2Bi2O3.3V2O5, BiV3O9, 6.5Bi2O3.2.5V2O5.TiO2, 2ZnO.3TiO2, ZnO.SiO2, ZrO2.SiO2, MgO.V2O5, SrO.V2O5, CaO.V2O5, BaO.V2O5, ZnO.V2O5, Na2O.17V2O5, K2O.4V2O5, 2Li2O.5V2O5 and reaction products thereof and combinations thereof. 10. The solar cell of claim 1,wherein the solids portion further comprises about 0.5 to about 25 wt % of a metal selected from the group consisting of Bi, Zn, In, Ga, Sb and alloys thereof. 11. The solar cell of claim 1, wherein the silver comprises silver selected from the group consisting of flakes, powder, or colloidal particles of silver, wherein the solids portion further comprises phosphorus, at least a portion of which is present as a coating on at least a portion of the silver flakes, powder or colloidal particles. 12. The solar cell of claim 1 further comprising a silver rear contact made from a mixture wherein. prior to firing, the mixture comprises: a. a solids portion andb. an organics portion,c. wherein the solids portion comprises i. from about 85 to about 99 wt % of a conductive metal component, andii. from about 1 to about 15 wt % of a glass component, wherein the glass component is lead-free. 13. The solar cell of claim 1, wherein the glass component comprises about 75 mol % Bi2O3, about 20 mol % SiO2 and about 5 mol % v2O5. 14. The solar cell of claim 1, wherein the solar cell comprises a substrate having an antireflective coating, and wherein the contact is prepared by applying the mixture to the antireflective coating and firing the mixture. 15. A solar panel comprising the solar cell of claim 1.
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