Silicon Wafer Based High Current 17.4% Polycrystalline Silicon Solar Cells

Silicon Wafer Based High Current 17.4% Polycrystalline Silicon Solar Cells System 1

Silicon Wafer Based High Current 17.4% Polycrystalline Silicon Solar Cells

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 1000 pc

Supply Capability:: 100000 pc/month

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4 Bus Bars 156*156 17.6% efficiency poly solar cell

PHYSICAL CHARACTERISTICS

Dimension: 156mm x 156mm ± 0.5mm

Wafer Thickeness: 180um+20um and 200um+20um

Front(-) Four 1.2mm silver busbar

Silicon nitride blue anti-reflection coating

Back(+) aluminum back surface field
1.75mm(silver) wide segment soldering pads

High Current Solar Cell 17.4% Polycrystalline Silicon Solar Cell Price

Typical Electrical Characteristics

Efficiency	W(Pmpp)	V(Umpp)	A(Impp)	V(Uoc)	A(Isc)
17.4-17.5	4.234	0.517	8.231	0.622	8.759
17.5-17.6	4.259	0.519	8.243	0.623	8.769
17.7-17.8	4.283	0.521	8.256	0.625	8.779
17.8-17.9	4.307	0.523	8.268	0.626	8.788
17.9-18.0	4.332	0.525	8.281	0.627	8.798
18.0-18.1	4.380	0.529	8.306	0.629	8.808
18.1-18.2	4.405	0.531	8.318	0.632	8.818
18.2-18.3	4.429	0.533	8.331	0.633	8.837
18.3-18.4	4.453	0.535	8.344	0.634	8.847
18.4-18.5	4.478	0.537	8.356	0.636	8.856
18.5-18.6	4.502	0.539	8.369	0.637	8.866

Efficiency	W(Pmpp)	V(Umpp)	A(Impp)	V(Uoc)	A(Isc)
20.90-21.00	5.06	0.557	9.007	0.653	9.688
20.80-20.90	5.04	0.556	9.062	0.652	9.683
20.70-20.80	5.02	0.554	9.055	0.651	9.684
20.60-20.70	4.99	0.552	9.033	0.651	9.672
20.50-20.60	4.97	0.550	9.002	0.650	9.673
20.40-20.50	4.94	0.548	9.012	0.649	9.674
20.30-20.40	4.92	0.546	9.009	0.649	9.655
20.20-20.30	4.89	0.543	9.012	0.648	9.634
20.10-20.20	4.87	0.541	8.998	0.648	9.617
20.00-20.10	4.85	0.540	8.977	0.647	9.600

*Data under standard testing conditional (STC):1,000w/m2,AM1.5, 25°C , Pmax:Positive power tolerance.

3 Bus Bars 156*156 17.4% efficiency poly solar cell

Dimension: 156 mm x 156 mm ± 0.5 mm

Wafer Thickeness: 156 mm x 156 mm ± 0.5 mm

High Current Solar Cell 17.4% Polycrystalline Silicon Solar Cell Price

Typical Electrical Characteristics:

Efficiency code	1660	1680	1700	1720	1740	1760	1780	1800	1820	1840	1860
Efficiency (%)	16.6	16.8	17.0	17.2	17.4	17.6	17.8	18.0	18.2	18.4	18.6
Pmax (W)	4.04	4.09	4.14	4.19	4.23	4.28	4.33	4.38	4.43	4.48	4.53
Voc (V)	0.612	0.615	0.618	0.621	0.624	0.627	0.629	0.63	0.633	0.635	0.637
Isc (A)	8.42	8.46	8.51	8.56	8.61	8.65	8.69	8.73	8.77	8.81	8.84
Imp (A)	7.91	7.99	8.08	8.16	8.22	8.27	8.33	8.38	8.43	8.48	8.53

* Testing conditions: 1000 W/m2, AM 1.5, 25 °C, Tolerance: Efficiency ± 0.2% abs., Pmpp ±1.5% rel.

* Imin : at 0.5 V

Production:

Package:

FAQ:

1. Q: Do you have your own factory?

A: Yes, we have. Our factory located in Jiangsu

2. Q: How can I visit your factory?
A: Before you visit,please contact us.We will show you the route or arrange a car to pick you up.
3. Q: Do you provide free sample?
A: Commenly we provide paid sample.

4. Q: Could you print our company LOGO on the nameplate and package?

A: Yes, we accept it.And need an Authorization Letter from you.

5. Q: Do you accept custom design on size?

A: Yes, if the size is reasonable.

6. Q: How can I be your agent in my country?

A: Please leave feedback. It's better for us to talk about details by email.

7. Q: Do you have solar project engineer who can guide me to install system?

A: Yes, we have a professional engineer team. They can teach you how to install a solar system.

Q: What is the effect of spectral response on the efficiency of a solar silicon wafer?: The spectral response refers to how well a solar silicon wafer converts different wavelengths of light into electricity. A high spectral response means that the wafer can efficiently convert a wide range of wavelengths, resulting in higher overall efficiency. Conversely, a low spectral response means that the wafer may not be able to convert certain wavelengths effectively, leading to reduced efficiency. Therefore, the spectral response plays a crucial role in determining the efficiency of a solar silicon wafer.

Q: What are the main defects in solar silicon wafers?: The main defects in solar silicon wafers include crystallographic defects such as dislocations, grain boundaries, and stacking faults. These defects can reduce the efficiency of solar cells by limiting the flow of electrons, causing recombination of charge carriers, and affecting the overall electrical properties of the wafers.

Q: How is the purity of a solar silicon wafer measured?: The purity of a solar silicon wafer is typically measured through various techniques, such as resistivity and impurity concentration measurements. Resistivity is commonly used as an indicator of purity, with higher resistivity indicating higher purity. Impurity concentrations, such as those of boron, phosphorus, and other elements, are also assessed to determine the level of impurities in the silicon wafer. These measurements help ensure the quality and efficiency of the solar cells fabricated from the wafer.

Q: How does the thickness of a front contact affect the efficiency of a solar silicon wafer?: The thickness of a front contact on a solar silicon wafer can affect its efficiency. A thicker front contact can reduce the amount of light reaching the silicon wafer, leading to lower efficiency. However, a thinner front contact can result in higher resistance and increased electrical losses, also impacting efficiency. Therefore, finding the optimal thickness that balances light absorption and electrical performance is crucial for maximizing the efficiency of a solar silicon wafer.

Q: How are solar silicon wafers protected from electrical surges?: Solar silicon wafers are protected from electrical surges through the use of protective devices such as surge arresters or varistors. These devices are connected in parallel with the solar cells and act as voltage clamps, diverting excess electrical energy away from the wafers. This helps prevent damage to the delicate silicon material and ensures the longevity and reliability of the solar panels.

Q: How are solar silicon wafers affected by dust or dirt accumulation?: Solar silicon wafers are negatively affected by dust or dirt accumulation as it reduces the amount of sunlight reaching the surface of the wafers, thereby reducing their efficiency in converting solar energy into electricity. Dust or dirt can create a barrier between the sunlight and the silicon material, resulting in decreased power output and overall performance of the solar cells. Hence, regular cleaning and maintenance are necessary to ensure optimal functioning of solar panels.

Q: How are solar silicon wafers affected by light trapping techniques?: Light trapping techniques can significantly enhance the performance of solar silicon wafers. These techniques aim to increase the absorption of sunlight within the wafer, allowing it to capture more photons and generate more electricity. By incorporating textured or nanostructured surfaces, antireflection coatings, or using backside reflectors, light trapping techniques can effectively reduce the reflection and transmission of light, thereby increasing the overall conversion efficiency of solar cells.

Q: How are solar silicon wafers tested for electrical performance?: Solar silicon wafers are tested for electrical performance using various methods. One common method is to measure the wafers' current-voltage (IV) characteristics, where a voltage is applied across the wafer, and the resulting current is measured. This helps determine the wafer's efficiency and its ability to convert sunlight into electricity. Other tests may include measuring the wafer's resistivity, open-circuit voltage, short-circuit current, and spectral response to evaluate its overall electrical performance. These tests ensure that the solar silicon wafers meet the required standards and can reliably generate electricity.

Q: What's the difference between a silicon wafer and a battery?: Silicon wafers are cut into pieces by wire cutting!The battery pack is a silicon wafer through the surface flocking, diffusion of PN junction, and then PECVD coating

Q: How is the demand for solar silicon wafers expected to grow in the future?: The demand for solar silicon wafers is expected to grow significantly in the future. As the global shift towards renewable energy continues, solar power generation is becoming increasingly popular and cost-effective. This increasing demand for solar energy will drive the need for more solar silicon wafers, which are crucial components of solar photovoltaic (PV) systems. Additionally, advancements in technology and manufacturing processes are expected to improve the efficiency and affordability of solar silicon wafers, further boosting their demand.

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