18.5 Poly Solar Cell for 275W Panel Module 5bb

Physical characteristics:

Product	FLAGSUN 5BB 156*156mm Polycrystalline Silicon Solar Cell
Model Number	FSC-PP-025
Material	Polycrystalline Silicon
Size	156*156mm
Number of Cells	1pcs
Efficiency	17%~20%
Max. Power	4.28~4.65watt
Thickness	200 μm +/-20μm
Front	1.0mm Bus Bars(Silver);Dark Blue Silicon Nitride AR Coating.
Back	2.5mm Wide Soldering Pads(Silver);Back Surface Field (Aluminium)

High efficient
Data under standard testing conditions(STC):1000W/Sq.M, AM1.5, 25ºC

NO	Efficiency(%)	Pmpp(W)	Vmpp(V)	Impp(A)	Voc(V)	Isc(A)	FF(%)
11	18.90-19.00	4.64	0.544	8.559	0.639	9.072	80.27
10	18.80-18.90	4.62	0.543	8.528	0.638	9.052	80.19
9	18.70-18.80	4.60	0.541	8.519	0.637	9.033	80.12
8	18.60-18.70	4.57	0.540	8.499	0.636	9.011	80.06
7	18.50-18.60	4.55	0.538	8.476	0.635	8.988	80.02
6	18.40-18.50	4.53	0.537	8.451	0.633	8.964	79.97
5	18.30-18.40	4.50	0.536	8.426	0.632	8.939	79.90
4	18.20-18.30	4.48	0.535	8.400	0.631	8.913	79.86
3	18.10-18.20	4.45	0.534	8.371	0.630	8.885	79.82
2	18.00-18.10	4.43	0.532	8.350	0.629	8.866	79.69
1	17.90-18.00	4.40	0.531	8.320	0.629	8.848	79.46

Flagsun's manufacturing covers the photovoltaic value chain from ingot casting and wafering through solar cell production and solar panel assembly.All the cell is with most strict quality standard in every production process .

Product drawing
Features:

1.High conversion efficiency resulting in superior power output performance.
2.Outstanding power output even in low light or high temperature conditions
3.Optimized design for ease of soldering and lamination
4.Long-term stability,reliability and performance
5.Output power tolerance of +/-3%


 Typical package for one box is 1200 cells. These cells are sealed in paper boards every 100 pcs.
Gross weight per unit shall be around 15 kg.
Solar Cell Production Line

Cleaning & Texturing: Wafers are cleaned with industrial soaps and form square-based pyramids also called texture. The texturization helps to reduce the reflection of sunlight. 
Diffusion: Wafers that have been pre-droped with boron during the casting process are then given a negative(n-type) surface characteristic by diffusing them with a phosphorus source at high temperature, which in turn creats the negative/positive(n-p) junction.

Etching: Phosphorus diffuses not only into the desired wafer surface but also into the side and the opposite surface to form PN. This gives a shunt path between the cell front and rear. Removal of the path around the wafer edge/edge junction isolation is named etching.

PECVD: By PECVD equipment, the wafers are coated with anti-reflection coating(ARC). It's the blue silicion nitride film to reduce reflection and promote absorption of light.

Printing & Heating: it was adopted by printing paste with screen technology to print the electrodes of silicion solar, and form a good ohmic contact.
Testing & Sorting: It means classifying the cells according to their efficiency tested under the simulated sunlight.
Manufacture process
Custom packaging