A plant source composite binder for polycrystalline silicon solar cell light back electrode paste and preparation method thereof
A technology of solar cells and back electrodes, applied in conductive materials, circuits, photovoltaic power generation and other directions dispersed in non-conductive inorganic materials, can solve the problem of insufficient photoelectric conversion rate of batteries, large environmental pollution, and weak adhesion to silicon plates, etc. problem, to achieve the effect of improving the photoelectric conversion rate, low price, and avoiding the phenomenon of clumping
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Embodiment 1
[0023] A plant-derived composite binder for the paste of the photo-rear electrode of a polycrystalline silicon solar cell, and its components and contents are shown in Table 1.
[0024] Its preparation method comprises the following steps:
[0025] 1) Gum Arabic, alginate, and safflower gum are mixed and then ground;
[0026] 2) dissolving the mixture ground in step 1) in water to form a binder solution;
[0027] 3) Under the condition of ultrasonic stirring, evenly disperse the talc powder in the binder solution.
[0028] The intensity of the ultrasound is 200-250w / cm 2 , preferably 225w / cm 2 .
[0029] The adhesive strength of this implementation adhesive is shown in Table 1.
[0030] Use this practice to mix the binder with conductive carbon fiber and active material (metal complex) to make a slurry, then print the slurry on a clean and dry glass substrate with a mesh of 40T to 120T, and then put it into the muffle Carry out high-temperature sintering in the furnace, ...
Embodiment 2
[0032] A plant-derived composite binder for the paste of the photo-rear electrode of a polycrystalline silicon solar cell, and its components and contents are shown in Table 1.
[0033] Its preparation method is with embodiment 1.
[0034] The adhesive strength of this implementation adhesive is shown in Table 1.
[0035] See Table 1 for the photoelectric conversion efficiencies of the polycrystalline silicon solar cells prepared by mixing the binder, the conductive agent, and the active material to form a slurry in this embodiment.
Embodiment 3
[0037] A plant-derived composite binder for the paste of the photo-rear electrode of a polycrystalline silicon solar cell, and its components and contents are shown in Table 1.
[0038] Its preparation method is with embodiment 1.
[0039] The adhesive strength of this implementation adhesive is shown in Table 1.
[0040] See Table 1 for the photoelectric conversion efficiencies of the polycrystalline silicon solar cells prepared by mixing the binder, the conductive agent, and the active material to form a slurry in this embodiment.
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Abstract
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