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Conductive paste and conductive track or coating

專利號
US10868200B2
公開日期
2020-12-15
申請人
JOHNSON MATTHEY PUBLIC LIMITED COMPANY(GB London)
發(fā)明人
Beatriz Cela Greven; Jonathan Charles Shepley Booth; Nicholas Nowak; Simon Johnson; Tobias Droste
IPC分類
H01L31/0224; H01B1/22
技術(shù)領(lǐng)域
wt,inorganic,particle,or,μm,paste,conductive,mixture,solar,less
地域: London

摘要

The present invention relates to a conductive paste for forming a conductive track or coating on a substrate, particularly suitable for use in solar cells. The paste comprises a solids portion dispersed in an organic medium, the solids portion comprising electrically conductive material and an inorganic particle mixture wherein the inorganic particle mixture comprises substantially crystalline particles. The present invention also relates to a method of preparing a conductive paste, a method for the manufacture of a surface electrode of a solar cell, an electrode for a solar cell and a solar cell.

說明書

D50≤1.6 μm;??(b)
D90≤4.1 μm;??(c)
(D50?D10)≤1.15 μm;??(d)
(D90?D50)≤2.5 μm;??(e)
(D90?D10)≤3.7 μm; or??(f)
(D50/D10)≤3.85.??(g)

One or more, two or more, three or more, four or more, five or more or six or more of these requirements may be met in the present invention.

In some embodiments, requirement (a) is met. In some embodiments requirement (b) is met. In some embodiments, requirement (c) is met. In some embodiments, requirement (d) is met. In some embodiments, requirement (e) is met. In some embodiments, requirement (f) is met. In some embodiments, requirement (g) is met.

Any combination of these requirements may be met in embodiments of the invention.

Regarding requirement (a), D10 is 0.41 μm or lower, for example 0.4 μm or lower, 0.39 μm or lower, 0.35 μm or lower, 0.32 μm or lower, 0.3 μm or lower, 0.28 μm or lower, 0.25 μm or lower or 0.24 μm or lower.

The value of D10 is preferably 0.4 μm or lower.

Typically, the D10 particle size may be at least 0.1 μm, at least 0.12 μm, at least 0.14 μm, at least 0.17 μm or at least 0.2 μm.

Accordingly, in some embodiments D10 is within the range 0.2 μm≤D10≤0.4 μm.

Regarding requirement (b), the D50 of the inorganic particle mixture is preferably less than or equal to 1.6 μm. The D50 may be 1.55 μm or lower, 1.5 μm or lower, 1.45 μm or lower, 1.4 μm or lower, 1.35 μm or lower, 1.3 μm or lower, 1.25 μm or lower, 1.2 μm or lower, 1.15 μm or lower, 1.1 μm or lower, 1.05 μm or lower, 1 μm or lower or 0.95 μm or lower.

權(quán)利要求

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