XTE+ GEO Solar Cell
Spectrolab
Spectrolab's latest 33% BOL efficiency triple-junction solar cell optimized for GEO and high-radiation missions (>1e14 fluence), fully qualified under AIAA-S111-2014.
Technical specifications
- BOL efficiency
- 33%
- EOL efficiency at 1e15 fluence
- 28.5%
- Cell technology
- GaInP/GaAs/Ge lattice matched triple-junction (3J)
- Qualification standard
- AIAA-S111-2014
- Target orbit
- GEO (>1e14 fluence)
- Available forms
- Bare cells or CIC assemblies
- Cell Thickness
- 160 µm
- Cell Mass
- 50-84 mg/cm²
- Solar Absorptance
- 0.89
- Emittance
- 0.85
- Open Circuit Voltage (ΔVoc/ΔT)
- -5.6 mV/°C
- Short Circuit Current (ΔJsc/ΔT)
- 10 µA/cm²/°C
- Efficiency
- 32.6%
- Voc
- 2.803 V
- Jsc
- 18.21 mA/cm²
- Vmp
- 2.512 V
- Jmp
- 17.56 mA/cm²
About
The XTE+ GEO is Spectrolab’s newest GaInP/GaAs/Ge lattice-matched triple-junction solar cell delivering 33% beginning-of-life efficiency — the highest in the XTE+ family. Optimized for geosynchronous orbit and high-fluence environments exceeding 1e14 1 MeV electrons, it achieves 28.5% efficiency at 1e15 fluence, making it ideal for 15-year GEO communication satellite missions.
Fully qualified under the AIAA-S111-2014 standard, the XTE+ GEO provides industry-leading BOL and EOL performance. Available as bare cells or as complete CIC (Cell Interconnect Coverglass) assemblies with space-qualified coverglass, bypass diode, and interconnects for welded connections. With over 70 years of Spectrolab space photovoltaic heritage, the XTE+ GEO powers some of the world’s most demanding satellite missions.
Documentation
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