A novel undoped monocrystalline silicon heterojunction solar cell and a preparation method thereof
A solar cell, non-doped technology, applied in the field of solar cells, can solve problems such as high cost and complex process
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[0020] Example
[0021] 1. Experimental materials
[0022] (1) n-type silicon wafer (CZ non-polished, 190μm, 0.8-5Ω.cm)
[0023] (2) Silica (purity>99.9%)
[0024] (3) Molybdenum trioxide (purity 99.99%)
[0025] (4) Titanium dioxide (purity>99.9%)
[0026] 2. Solar cell preparation steps
[0027] A. Silicon wafer cleaning: 4×4cm 2 Single crystal silicon wafers are cleaned by the standard RCA method, and each step is ultrasonically cleaned with deionized water for 2 minutes. The specific steps are as follows:
[0028] 1) 10min ultrasonic cleaning with acetone;
[0029] 2) Ultrasonic cleaning with absolute ethanol for 10 minutes;
[0030] 3) Prepare a 25% NaOH solution and heat it in a water bath at 80°C for 20 minutes;
[0031] 4) Take (29%) NH 4 OH: (30%) H 2 O 2 : Deionized water = 1:1:5 to prepare a cleaning solution, and heat in a water bath at 80°C for 10 minutes;
[0032] 5) Take (37%)HCl:(30%)H 2 O 2 : Deionized water = 1:1:5 to prepare a cleaning solution, and heat in a water bath at 8...
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