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27% Efficiency Low Cost Triple Junction Gallium Arsenide Solar Cell (heterotypic Solar Cell)

1.As a byproduct in the production of triple junction gallium arsenide solar cells, the efficiency is comparable to that of model solar cells, and the cost is much lower than that of model solar cells. The advantages of heterotypic solar cells are also reflected in flexible layout and the ability to output various bus voltages on small modules.
2: There are two specifications: triangular and trapezoidal. The packaging of triangular solar cells can only use commercial SMT, while trapezoidal solar cells can use SMT or universal resistance welding technology for space solar cells.

Model:
SAP201b/c
Brand:
YIM

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Product Description

Battery structure

P/N structure N/P type triple junction structure, the main materials of the top battery to the bottom battery are respectively

GaInP2/InGaAs/Ge

Upper electrode Gold Nickel/Gold/Silver/Gold (AuGeNi/Au/Ag/Au)

Lower electrode palladium/silver/gold (Pd/Ag/Au)

Anti-reflection film Titanium oxide / aluminum oxide (TiOx / Al2O3)

b) Typical electrical performance

Voc(mV) 2630

Jsc (mA/cm2) 16.8

Pm(mW/cm2) 36.5

Average photoelectric conversion efficiency (Eff) is not less than 27%

c) battery characteristics

Typical size (mm) 35.4×16.7, (35.4+13.6)×14.7

Ge substrate thickness (mm) 0.155 ± 0.02

Area density (mg/cm2) ≤80

The SAP201b uses a trapezoidal solar cell with a 8V bus voltage output as a baseline product. The high bus voltage solution can be customized for a lifetime of 1 to 2 years.

The SAP201c adopts a triangular solar cell and a 3V bus voltage as a baseline product. The high bus voltage scheme can be customized, 5V~12V, the power will not be reduced, and the life span is 0.5~1 years

TYPE		SAP201b		SAP201c
		Trapezoidal solar cell 5S6P		Triangular solar cell 2S17P
（mm）		83mm×211.5mm
BOL	V_oc（V）	25℃	13.1	5.24
	V_mp（V）	85℃	9.41	3.76
	P_mp（W）	25℃	4.05	4.30
	P_mp（W）	85℃	3.45	3.67
EOL	V_oc（V）	25℃	12.7	5.08
	V_mp（V）	85℃	9.03	3.61
	P_mp（W）	25℃	3.70	3.92
	P_mp（W）	85℃	3.15	3.36

1) BOL indicates data at the beginning of life;

2) EOL indicates the data at the end of the orbital life, SAP200b is estimated according to the 1-year life expectancy, and the SAP200c is estimated according to the 6-month life expectancy;

3) Pmp is the output power of the solar array at the optimal operating point