Triple-Junction GaAs Solar Cells-TJ30
TJ30 has a heritage upright lattice-matched structure and exhibits excellent radiation resistance. The average conversion efficiency exceeds 30% under AM0 test conditions.
Design and Mechanical Data
◼ Substrate Material:Ge
◼ Base Material:GaInP/GaAs/Ge
◼ AR-coating :TiOx/Al2O3
◼ Size:40.0mm×80.0mm,60.0mm×120.0mm,67.0mm×138.0mm
◼ Thickness:180±20μm
◼ Average Weight:≤110mg/cm2
◼ Service orbit:LEO, MEO, GEO
- Product Description
- Specification
- Product Advantage
Product Description
MINDWAY’s TJ30 Triple-Junction GaAs Solar Cells feature a heritage upright lattice-matched structure with outstanding radiation resistance and industry-leading performance, boasting an average conversion efficiency of over 30% under AM0 test conditions (1353W/m², T=25℃). Engineered with a GaInP/GaAs/Ge base material and Ge substrate, paired with a high-performance TiOₓ/Al₂O₃ AR-coating, the TJ30 solar cells deliver stable electrical performance even under high electron fluence environments.
Available in standard sizes of 40.0mm×80.0mm, 60.0mm×120.0mm, 67.0mm×138.0mm (custom sizes are also supportable) with a thickness of 180±20μm and an average weight ≤110 mg/cm², the TJ30 is perfectly adapted for LEO, MEO, and GEO service orbits, with optional CICs supply for diverse space application needs. Its electrical performance remains robust after radiation exposure: at 1E15 e/cm² fluence, the bare efficiency still reaches 25.8%, with minimal attenuation of short circuit current and open circuit voltage.
With a service life of 8 years for low orbit and 15 years for high orbit, short 1-month delivery cycle, and high reliability, MINDWAY’s TJ30 Triple-Junction GaAs Solar Cells and matching satellite solar panels are the ideal core power solution for critical space missions, providing long-term, stable power support for satellites in all orbits.
Solar Panels for Satellites Typical Performance Data:
◼ Orbit:LEO, MEO, GEO;
◼ Strong adaptability to space environment、long life and high reliability in all orbits;
◼ Al honeycomb substrates + CFRP layers、PCBs and Al substrates can be customized;
◼ lifetime:8 years for low orbit, 15 years for high orbit;
◼ Delivery cycle:1 month.
Typical Applications
1.Space orbit power supply
Designed for LEO, MEO, GEO, serving as core power component for satellites in these orbits.
2.Satellite solar panel systems
Key cell unit of satellite solar panels (8-year LEO, 15-year GEO service life), tailored to satellite and orbit needs.
Specification
| Parameter Category | Specific Parameters | Specifications/Details |
|---|---|---|
Basic Material & Coating | Substrate Material | Ge |
Base Material | GaInP/GaAs/Ge | |
Anti-Reflection (AR) Coating | TiOₓ/Al₂O₃ | |
Mechanical & Dimension Data | Standard Sizes | 40.0mm×80.0mm, 60.0mm×120.0mm, 67.0mm×138.0mm (custom sizes optional) |
Cell Thickness | 180±20μm | |
Average Cell Weight | ≤110 mg/cm² | |
Supply Option | CICs available | |
Applicable Orbit | Service Orbit | LEO, MEO, GEO |
Typical Cell Performance (AM0:1353W/m², 25℃, 1MeV Electron Irradiation) | Bare Cell Efficiency (BOL) | 30.0% |
Bare Cell Efficiency (@1E14 e/cm²) | 28.8% | |
Bare Cell Efficiency (@5E14 e/cm²) | 27.0% | |
Bare Cell Efficiency (@1E15 e/cm²) | 25.8% | |
Short Circuit Current (Jsc, BOL) | 17.5 mA/cm² | |
Open Circuit Voltage (Voc, BOL) | 2.75 V | |
Max Power Current (Jm, BOL) | 16.6 mA/cm² | |
Max Power Voltage (Vm, BOL) | 2.45 V | |
Thermal Performance | Temperature Coefficient Calibration Range | 20℃~80℃ (for Jsc, Voc, Jm, Vm) |
Matching Solar Panel - Substrate Customization | Substrate Types | Al honeycomb+CFRP, PCBs, Al |
Power per Mass (Al honeycomb+CFRP) | 88~125 W/kg | |
Power per Mass (PCBs) | 65 W/kg | |
Power per Mass (Al) | 38 W/kg | |
Mass per Area (Al honeycomb+CFRP) | 2.0~3.2 kg/m² | |
Mass per Area (PCBs) | 3.5 kg/m² | |
Mass per Area (Al) | 7.3 kg/m² | |
Matching Solar Panel - Reliability & Delivery | Service Life (LEO) | 8 years |
Service Life (GEO) | 15 years | |
Environmental Adaptability | Strong space environment adaptability, high reliability for all orbits | |
Delivery Cycle | 1 month |
Product Advantage
-
1
High photoelectric conversion efficiency
Bare cell efficiency reaches up to 32% (AM0, 1353W/m², 25℃), with 30% and 32% grades, and matching excellent electrical parameters.
-
2
Superior radiation resistance
After 1Mev electron irradiation, Pmp/Pmp0 remains 84% (32% grade) and 86% (30% grade) at 1E15 e/cm², ensuring stable space operation.
-
3
Excellent structural and mechanical performance
Lightweight: ≤115mg/cm², CICs thickness 300±25μm, 30μm interconnector, reducing system load.
Reliable interconnection: Silver/silver-coated Kovar interconnectors pass 45° pull test (>1.6N).
Si diode bypass protection prevents reverse current damage to cell arrays.
-
4
Good thermal adaptability and stable temperature performance
Low absorption coefficient (≤0.89), calibrated temperature coefficients (20℃~80℃) ensure stable output in space temperature changes.
-
5
Customizable design flexibility
Customizable coverglasses (optional ITO) and satellite solar panel substrates (Al honeycomb+CFRP, PCBs, Al) meet diverse needs. -
6
High-quality material and coating configuration
GaInP/GaAs/Ge base (Ge substrate), TiOₓ/Al₂O₃ AR coating, and 120μm KFG120 coverglass ensure light absorption and protection.

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