a solar cell
A technology for solar cells and glass plates, applied in the field of solar cells, can solve the problems of affecting the photoelectric conversion efficiency and service life of solar cells, being unable to meet the requirements for the performance of solar cell glass, low solar light acceptance rate, etc., so as to improve the photoelectric conversion efficiency. , The effect of improving visible light transmittance and reducing ultraviolet transmittance
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Embodiment 1
[0018] A solar cell comprising an upper glass plate, a solar cell element and a lower protective substrate, wherein the upper glass plate is prepared from the following raw materials in parts by weight: 40 parts of quartz sand, 10 parts of magnesium oxide, 8 parts of calcite, oxidized 7 parts of aluminum, 5 parts of Glauber's salt, 3 parts of kaolin, 0.3 parts of strontium carbonate, and 0.1 part of yttrium oxide.
[0019] The upper glass plate is prepared according to the following method:
[0020] Step 1) Mix tetraethyl orthosilicate and absolute ethanol evenly at a volume ratio of 1:20, age for 5 days, then raise the temperature to 80°C under the protection of N2, and then add acrylic acid and diallyl phthalate in sequence ester and butyl acetate, and stir until completely homogeneous and transparent to obtain the coating; in the above step 1), acrylic acid, diallyl phthalate and butyl acetate respectively account for 1 / 5 and 1 / 5 of the volume of absolute ethanol 10 and 1 / ...
Embodiment 2
[0024] A solar cell comprising an upper glass plate, a solar cell element and a lower protective substrate, wherein the upper glass plate is prepared from the following raw materials in parts by weight: 50 parts of quartz sand, 15 parts of magnesium oxide, 9 parts of calcite, aluminum oxide 8 parts, Glauber's salt 6 parts, kaolin 4 parts, strontium carbonate 0.4 parts, yttrium oxide 0.2 parts.
[0025] The upper glass plate is prepared according to the following method:
[0026] Step 1) Mix tetraethyl orthosilicate and absolute ethanol evenly at a volume ratio of 1:20, age for 8 days, then raise the temperature to 80°C under the protection of N2, and then add acrylic acid and diallyl phthalate in sequence ester and butyl acetate, and stir until completely homogeneous and transparent to obtain the coating; in the above step 1), acrylic acid, diallyl phthalate and butyl acetate respectively account for 1 / 5 and 1 / 5 of the volume of absolute ethanol 10 and 1 / 10;
[0027] Step 2)...
Embodiment 3
[0030] The performance test of the glass plate prepared by the embodiment of the present invention 1 and embodiment 2:
[0031] The thermal expansion coefficient is the value showing the relative expansion rate of the sample to the original length, according to DIN51045; the flexural strength is measured by a ceramic testing machine; the micro-Vickers hardness is measured by a digital micro-hardness tester, using a Vickers indenter, and the load is 100g. The time is 30s. See Table 1 for details:
[0032] Table 1
[0033] group Vickers hardness (HV 0.1 / 30) Coefficient of thermal expansion (×10 -7 / K) Flexural strength Gpa Example 1 527 78.7 87.1 Example 2 532 76.9 86.3
[0034] 2. Taking the 3.2mm sample as an example, the test results of the Cary500 spectrophotometer are as follows in Table 2:
[0035] Table 2
[0036] group Visible light transmittance% Solar transmittance% UV transmittance% Example 1 94.9 96.0 73....
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