Natively textured ZnO layers deposited by the expanding thermal plasma CVD
technique between 150 and 350 degreesC at a deposition rate between 0.65 an
d 0.75 nm/s have been investigated with respect to their suitability as fro
nt electrode material for amorphous silicon pin solar cells in comparison t
o reference SnO2:F (Asahi U-type). At higher substrate temperature and with
growing thickness, the surface roughness of the ZnO films increases. Layer
s with electrical (sheet resistance < 10 <Omega>/rectangle), optical (trans
mittance > 80%) and morphological (surface texture) properties comparable t
o Asahi U-type SnO2:F have been obtained. Preliminary solar cells deposited
on ZnO show an efficiency approaching 10%. (C) 2001 Elsevier Science B.V.
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