XTE+ LEO Solar Cell
Spectrolab
Spectrolab's 33% BOL efficiency triple-junction solar cell optimized for LEO missions with lower radiation fluence (<1e14), achieving 30.6% efficiency at 1e14 fluence.
Technical specifications
- BOL efficiency
- 33%
- EOL efficiency at 1e14 fluence
- 30.6%
- Cell technology
- GaInP/GaAs/Ge lattice matched triple-junction (3J)
- Qualification standard
- AIAA-S111-2014
- Target orbit
- LEO (<1e14 fluence)
- Available forms
- Bare cells or CIC assemblies
- Open Circuit Voltage (BOL)
- 2.807 V
- Open Circuit Voltage (EOL, 1e14 fluence)
- 2.706 V
- Short Circuit Current Density (BOL)
- 18.07 mA/cm²
- Short Circuit Current Density (EOL, 1e14 fluence)
- 17.91 mA/cm²
- Solar Absorptance
- 0.91
- Emittance
- 0.85
- Cell Thickness
- 160 µm - 240 µm
- Cell Mass
- 50-84 mg/cm²
About
The XTE+ LEO is Spectrolab’s newest GaInP/GaAs/Ge lattice-matched triple-junction solar cell delivering 33% beginning-of-life efficiency, specifically optimized for low Earth orbit constellations and other low-fluence environments under 1e14 1 MeV electrons. With 30.6% efficiency at end of life (1e14 fluence), it is the leading choice for LEO mega-constellations and small satellite platforms where minimizing panel area and mass is critical.
Fully qualified under AIAA-S111-2014, the XTE+ LEO delivers superior EOL performance in low-radiation environments. Available as bare cells or as CIC assemblies complete with space-qualified coverglass, bypass diode, and interconnects for welded solar panel integration. Spectrolab’s XTE+ family represents the current state of the art in space photovoltaics.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.