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Objectives
Manufacturing and qualification of fully European triple junction solar cell. The qualification has been subdivided into 3 phases.
Phase 1: Cell 3G27-ID2*, with an efficiency of 27 % was designed for LEO applications and qualified at bare solar cell and solar assembly level for the Herschal & Planck mission requirements.
The 3G-27-ID2* cell and solar cell assembly where qualified for the Aeolus mission requirements.
Phase 2: Cell 3G28-ID2*, with an efficiency of 28% was designed for GEO application. Qualification comprised cell, SCA and coupon testing.
Phase 3: Qualification covered wing level for which the Alphabus Q-Panel was used.
Challenges
The intention of the project was to produce and qualify a fully European triple junction solar cell, with a high efficiency of the sun light-to-current conversion, low temperature coefficients and excellent power-to-mass ratio, based on III-V compound semiconductor materials.
Fig.1 typical spectral response of the triple junction cell 3G28-ID2*
Plan
Sept 2003: Production and qualification of a fully European triple junction cell 3G27-ID2*.
Sept 2005: Production and qualification of the next generation of fully European triple junction cell 3G28-ID2*.
Feb 2006: Q-Panel qualification on Wing level .
Current Status
The triple junction cells successfully passed all tests, performed from component up to wing level, for GEO applications.