The structural properties of CdTe layers grown on different substrates were characterized for their application in “substrate” and “superstrate” type solar cells. CdCl2 treated CdTe layers in substrate configuration have large grains up to 10 mm with well defined shape and the (111) preferred orientation is retained. Na has a strong influence on the crystallization and electronic properties of the CdTe layers. As-deposited and CdCl2 treated CdTe layers on alkali free glass have small but more compact grains, the layers are always (111) oriented. The solar cells in substrate configuration exhibit low efficiency, but in superstrate configuration high efficiency cells were obtained: 11% with evaporated Sb2Te3 and 12% with Cu/Au contacts.
A comparison of the vacuum evaporated CdTe substrate and superstrate solar cells
ROMEO, Alessandro;
2000-01-01
Abstract
The structural properties of CdTe layers grown on different substrates were characterized for their application in “substrate” and “superstrate” type solar cells. CdCl2 treated CdTe layers in substrate configuration have large grains up to 10 mm with well defined shape and the (111) preferred orientation is retained. Na has a strong influence on the crystallization and electronic properties of the CdTe layers. As-deposited and CdCl2 treated CdTe layers on alkali free glass have small but more compact grains, the layers are always (111) oriented. The solar cells in substrate configuration exhibit low efficiency, but in superstrate configuration high efficiency cells were obtained: 11% with evaporated Sb2Te3 and 12% with Cu/Au contacts.
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