Photoluminescence PL detection equipment is a device that can truly realize online detection.
Photoluminescence is a phenomenon of luminescence of semiconductors. When light is irradiated on the surface of a material, its electrons absorb photons and jump to a high energy level. Due to the instability of electrons at high energy levels, they. will fall back to a low energy level. At the same time, the energy accompanied by the energy level difference is emitted as optical radiation. This process is photoluminescence, or PL.
It is widely used, mainly in the detection of electronic structure, energy band, quality identification and other fields. It is also a key test equipment in photovoltaic cell detection.
In the context of the current foreign crisis and domestic surplus, the photovoltaic industrynational policy will inevitably move towards integration and elimination. Reducing costs and improving quality are the basis for a business to remain invincible. Therefore, PL test equipment is very critical.
He who seizes the opportunity will win. It is said that all major domestic photovoltaic companies are preparing to install PL photoluminescence testing equipment.
PL Equipment:
1 You know about home equipment, which is basically well promoted, and I've never heard of anyone using home equipment. Additionally, it cannot be analyzed online, which is a fatality.
2. American equipment is available online and offline, with relatively comprehensive test results and unique dual-band analysis. Unfortunately, the price prohibits many manufacturers.
3. South Korean equipment has been supplied to the Chinese market since'last year. They have a beautiful design and can be used for online analytics. The price is cheaper than USA, but the production. the capacity is not too high and it is difficult to detect bare chips.
4. A German model also appears in the Chinese market and can detect online and offline, but unfortunately it only applies to battery cells. The price is also higher.
5. Everyone knows Hungarian equipment. Hungary has become a major supplier of equipment for global photovoltaic testing, especially upstream testing, and is particularly recognized at home and abroad.
Hungarian equipment currently has two brands: Semilab, the price is really good, but the price will not be reduced, so if you want to buy it, you will not buy it; >The PHYS brand is also very well known and very popular in infrared detection. In terms of performanceormances, it is without equal. Based on their unique technology, they recently developed a PL photoluminescence detection system. uses the most advanced IR camera to detect more waveband information than CCD. At the same time, it uses online photography, that is, the step-by-step method, to avoid distortion, the information is real, and the analysis software is powerful. The price is also easily acceptable in China!
6. In Australia, BT's results are not as good as in the United States, but prices are not low, mainly because they are early to the Chinese market.
7. There is a company in Taiwan with equipment similar to that in South Korea.
To summarize, PHY PL is profitable.
Technical parameters of solar cell sorting machine
First of all, you need to understand what a solar panel is. Solar panelsnt made up of several solar cells welded together.
Generally speaking, solar panels are also called solar modules or photovoltaic modules.
Manufacturing requires: crystalline silicon cells, glass, aluminum alloy, EVA, junction boxes, welding tapes.
The equipment required is: sorting equipment (for cell power classification), rope welding; equipment (welding multiple battery sheets), laminating equipment (pressing glass, EVA and battery sheets to form a whole battery panel), framing equipment (installation of aluminum alloy frames) , testing equipment (component tester, EL tester);
Process flow: sorting → string welding (forward and reverse welding) → EL detection → composition and laying → lamination → frame installation → installation of the junction box → test of the cofinished components → testing EL components → cleaning → packaging → storage.
Technical indicators of solar cell sorting machine
Model specifications SCT-A SCT-B The spectral range meets the requirements of IEC60904-9 (level A) Irradiation intensity 100 mW/cm (adjustment range 70 ~ 120 mW/cm) Irradiation unevenness ≤ ± 2% ≤ ± 3% Irradiation instability ≤ ± 2% ≤ ± 3% Consistency of results test value ≤ ± 0.5% ≤ ± 1% Electrical properties Test error ≤ ± 1% ≤ ± 2% Single flash time 10 ms Effective test area 200 mm × 200 mm Effective test range 0.1 W ~ 5 W Measuring voltage 1 V (1 mV) Measuring current 10 A (resolution 1 mA) Test parameters Isc, Voc, Pmax, Vm, Im, FF, EFF, temperature data Collection contains 8,000 data collection points
1. Open circuit voltage (Voc): Under light, when the battery is not connected to a load. Voltage 2. Short circuit current (Isc) : The output current of the battery when the battery is short-circuited under the light
3. Maximum Power (Pmax): The maximum power the battery can produce under light
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4. Voltage (Vopt)/Current (Iopt) at maximum power
5. Fill factor: Pmax/Voc * Isc, which reflects the variation characteristics of the battery output power with load< /p>
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6. Efficiency: How efficiently the cell operates under light
7. Equivalent Series Resistance: The equivalent series resistance inside the solar cell will affect its forward voltage. ampere characteristics and short circuit current. In addition, increasing the series resistance will reduce the fill factor and photoelectric conversion efficiency of the solar cell.