Details

Autor(en) / Beteiligte

• Lillington, D.
• Cotal, H.
• Ermer, J.
• Friedman, D.
• Moriarty, T.
• Duda, A.

Titel

32.3% efficient triple junction GaInP/sub 2//GaAs/Ge concentrator solar cells

Ist Teil von

• Collection of Technical Papers. 35th Intersociety Energy Conversion Engineering Conference and Exhibit (IECEC) (Cat. No.00CH37022), 2000, Vol.1, p.516-521 vol.1

Ort / Verlag

IEEE

Erscheinungsjahr

2000

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• This paper describes progress toward achieving high efficiency, multijunction solar cells for cost effective application in terrestrial PV concentrator systems. Small area triple junction GaInP/sub 2//GaAs/Ge solar cells have been fabricated with an efficiency of over 32% when measured by NREL under an AM1.5D spectrum at 47 suns concentration. Small changes to the device design can achieve similar efficiencies at concentration ratios of about 500 suns, resulting in cell costs of 0.5 to 0.6/W today, at production volumes of approximately 50 MW/year. This makes them highly cost effective in existing concentrator systems, compared to flat plate technologies. The future development of new 1 eV materials for space cells, in conjunction with further reduction in Ge wafer costs, promises to achieve solar cells of >40% efficiency that cost 0.4/W or less at these concentration ratios.