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Monocrystalline 210 12BB PERC Bifacial Solar Cell

Monocrystalline 210 12BB PERC Bifacial Solar Cell

Dimensions :
210mm*210mm±0.25mm
Thickness :
180±20μm
Front (-) :
12*0.06±0.04mmbusbar (silver), 174±15 fingers Blue (dark blue)
Back (+) :
Back electrode width (silver) 2.12 ±0.4mm, back covered with fingers

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Product Details

What is PERC Technology?

PERC means Passivated Emitter and Rear Contact or Passivated Emitter and Rear Cell .

Traditional cells saw jumps in efficiency when panel manufacturers began putting a front passivation layer to prevent electron recombination at the front panel. Additional bumps in efficiency were achievable by reducing the number of electrons that hit the rear of the panel.

PERC cells take this one step further by placing an additional capping and passivation layer on the rear surface of the photovoltaic (PV) panels, thereby reducing back-side recombination. These layers also help prevent the panels from heating up from unreflected solar radiation. Since panels perform better in cooler temperatures, this helps boost performance as well. PERC cells work in a similar manner but with a few key differences.

The n-type sheet, which is negatively charged, typically contains more atoms that have an additional electron in their outer shell — like phosphorus — to maintain that negative charge.

The positive p-type sheet contains positively charged holes into which those additional electrons can fit. These are usually boron or gallium, which lack one valence electron needed to bond with the silicon around it.

The atoms missing an outer electron — the holes — naturally bond with the atoms that have an extra valence electron. This leaves one additional electron out of the bond, which then gets discharged and collected as electricity.

When solar energy enters the panel, the positive and negative silicon layers naturally rebalance, and the process begins again. While the underlying idea is the same, PERC cells have a few additional layers to prevent the loss of electrons to the outside world.

Light intensity reliability

Intensity(W/m²)	1000	900	800	600	400
Uoc	1.0	0.996	0.991	0.988	0.962
Isc	1.0	0.903	0.803	0.602	0.403
* Taking the Voc(Isc) tested at 1000W/m² as the standard, test the decrease of Voc (Isc) with the light intensity.

Solderability IV curve

Minimum peeling strength	≥1.1N/mm
Results may vary depending on electrode, welding method, and conditions.

Front Electrical performance distribution

Efficiency Eff(%)	Maximum output power Pmpp(W)	Maximum output voltage Umpp(V）	Maximumpower point current Impp(A)	Open-circuit voltage Uoc(V)	Short- circuit current Isc(A)	FF(%)
23.1	10.18	9.75	17.261	0.690	18.186	81.15
23.0	10.14	0.589	17.216	0.689	18.166	81.01
22.9	10.10	0.587	17.206	0.688	18.140	80.93
22.8	10.05	0.586	17.151	0.687	18.125	80.71
22.7	10.01	0.584	17.140	0.686	18.108	80.58
22.6	9.97	0.583	17.101	0.685	18.088	80.46
22.5	9.92	0.581	17.074	0.685	18.062	80.18
22.4	9.88	0.579	17.064	0.684	18.049	80.02
22.3	9.83	0.577	17.036	0.682	18.030	79.94
22.2	9.79	0.575	17.026	0.681	18.016	79.79
22.1	9.75	0.574	16.986	0.680	17.995	79.68
Standard test conditions:1000W/m², AM1.5, 25℃. The above technical parameters are subject to technical changes and tests. All data contained in this datasheet is subject to change without notice.

Back Electrical performance distribution

Efficiency Eff(%)	Maximum output power Pmpp(W)	Maximum output voltage Umpp(V）	Maximumpower point current Impp(A)	Open-circuit voltage Voc(V)	Short- circuit current Isc(A)
>16	7.06	0.582	12.130	0.677	13.361
15.5-16	6.92	0.579	11.952	0.675	13.352
>15-15.5	6.70	0.572	11.713	0.673	13.244
<15	6.53	0.565	11.558	0.672	13.124
Standard test conditions:1000W/m², AM1.5, 25℃. The above technical parameters are subject to technical changes and tests. All data contained in this datasheet is subject to change without notice.