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.
Typed specifications15 values
Discloses 5 of 7 fields engineers filter by in this category (category median 2).
- Mass
- 50–84 g product page
- Cell efficiency
- 32.2 % BOL · datasheet p.1 30.6 % EOL, 1E14 1MeV electron
- Envelope (L×W×H)
- <85 cm2 cell size · datasheet p.1
- Supply voltage
- 2.81 V product page 2.71 V
- Array configuration
- other Space Qualified Triple Junction Solar Cell (bare cell product) · datasheet p.1
- Cell type
- triple-junction GaAs Space Qualified Triple Junction Solar Cell · datasheet p.1
- Cell part number
- Spectrolab XTE+ LEO datasheet p.1
- Open-circuit voltage at the panel output (Voc)
- 2.81 V BOL · datasheet p.1
- Max-power voltage at the panel output (Vmp)
- 2.52 V BOL · datasheet p.1
- Flight heritage
- Based on 25+ years of heritage 3J devices; fully qualified under AIAA-S111 2014 datasheet p.1
- Cell area
- 77 cm² 77 cm2 class (rectangular cell) · datasheet p.2 27 cm² cell size of the datasheet parameters; 27cm2 class (rectangul…
- Power temperature coefficient
- -5.5 %/°C datasheet p.2
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier14 lines, in the manufacturer's own wording
- 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.