Details

Autor(en) / Beteiligte

• Chiu, P. T.
• Law, D. C.
• Woo, R. L.
• Singer, S. B.
• Bhusari, D.
• Hong, W. D.
• Zakaria, A.
• Boisvert, J.
• Mesropian, S.
• King, R. R.
• Karam, N. H.

Titel

35.8% space and 38.8% terrestrial 5J direct bonded cells

Ist Teil von

• 2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), 2014, p.0011-0013

Ort / Verlag

IEEE

Erscheinungsjahr

2014

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• Spectrolab has fabricated a direct semiconductor bonded space solar cell with an efficiency of 35.8% under the AM0 space spectrum. Using a similar technology, Spectrolab has achieved a 5-junction (5J) direct bonded terrestrial cell with a record efficiency of 38.8% under the one-sun AM1.5G terrestrial spectrum. Efforts to further improve the 5J cell efficiency have focused on development of the top 3 junctions (T3J) grown on GaAs. Experiments with top 3J isotype cells have yielded an improvement of 1% in current and 100 mV in voltage for the T3J. Spectrolab has also made significant improvements in its direct bonding process. The improved process has increased bond strengths by more than a factor of 5 and eliminated issues with large voids.