Details

Autor(en) / Beteiligte

• Steiner, M. A.
• Perl, E. E.
• Geisz, J. F.
• Friedman, D. J.
• Jain, N.
• Levi, D.
• Horner, G.

Titel

Apparent bandgap shift in the internal quantum efficiency for solar cells with back reflectors

Ist Teil von

• Journal of applied physics, 2017-04, Vol.121 (16)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2017

Quelle

Scitation (American Institute of Physics)

Beschreibungen/Notizen

• We demonstrate that in solar cells with highly reflective back mirrors, the measured internal quantum efficiency exhibits a shift in bandgap relative to the measured external quantum efficiency. The shift arises from the fact that the measured reflectance at the front surface includes a superposition of waves reflecting from the front and back surfaces. We quantify the magnitude of the apparent shift and discuss the errors that can result in determination of quantities such as the photocurrent. Because of this apparent shift, it is important the bandgap be determined from the external quantum efficiency.