Solar cell

Home

Solar cell

TOPCon G1 9BB Bifacial Solar Cell

Dimensions :
(158.75mm±0.5mm)×(158.75mm±0.5mm）
Thickness :
170μm±20μm
Front(+) :
0.1mm bus bars(silver),blue anti-reflection coating(silicon nitride)
back(-) :
0.1mm bus bars(silver),blue anti-reflection coating(silicon nitride)

Inquire Now

Product categories

how can we help you

You can contact us any way that is convenient for you. We are available 24/7 via email or telephone.

New Products

Product Details

What is TOPCon Technology?

The full name of TOPCON is Tunnel Oxide Passivating Contacts, which is an N-type silicon wafer cell technology. TOPCon cells, namely tunneled oxide passivation contact solar cells, aim to improve solar cell efficiency by solving the problem of passivation contact of cell carrier selection.

The front surface of TOPCON cell has the same structure as that of conventional N-type solar cells, the main difference is to prepare a layer of ultra-thin silicon oxide on the back of the battery, and then deposit a thin layer of doped silicon, which together form a passivation contact structure, effectively reducing surface composite and metal contact composite.

Due to the good passivation effect of ultra-thin silicon oxide and heavy doped silicon film, the surface band of the silicon wafer is bent, thereby forming a field passivation effect, the probability of electron tunneling is greatly increased, the contact resistance is reduced, and the conversion efficiency is finally improved.

Engineering Drawing(mm)

Light intensity reliability

Intensity(W/m²)	1000	900	500	300	200
Voc	1.0	0.994	0.974	0.951	0.927
Isc	1.0	0.9	0.5	0.3	0.2
* Taking the Voc(Isc) tested at 1000W/m² as the standard, test the decrease of Voc (Isc) with the light intensity.

IV curve Spectral Response

Electrical performance distribution

Efficiency (%)	Pmpp (Wp)	Umpp (V)	Impp (A)	Uoc(V)	Isc(A)	FF(%)
23.60-23.70	5.95	0.610	9.763	0.701	10.221	83.04
23.50-23.60	5.93	0.608	9.748	0.700	10.212	82.92
23.40-23.50	5.91	0.607	9.727	0.700	10.197	82.80
23.30-23.40	5.88	0.606	9.708	0.699	10.181	82.69
23.20-23.30	5.86	0.604	9.692	0.698	10.169	82.57
23.10-23.20	5.83	0.603	9.678	0.697	10.160	82.42
23.00-23.10	5.81	0.601	9.665	0.696	10.151	82.27
22.90-23.00	5.78	0.599	9.653	0.694	10.142	82.13
22.80-22.90	5.76	0.598	9.640	0.693	10.135	81.97
22.70-22.80	5.73	0.595	9.633	0.692	10.132	81.79
22.60-22.70	5.71	0.593	9.625	0.691	10.127	81.65
22.50-22.60	5.68	0.591	9.618	0.689	10.125	81.46
22.40-22.50	5.66	0.588	9.618	0.688	10.126	81.27
22.30-22.40	5.63	0.586	9.615	0.686	10.131	81.08
22.20-22.30	5.61	0.584	9.602	0.685	10.127	80.85
22.00-22.10	5.58	0.583	9.578	0.683	10.099	80.89