Download Development of an intermediate layer for application to multi

Development of an intermediate layer
for application to multi-junction solar cells
In multi-junction solar cells
Future Plan
‹The short-circuit current is limited by the sub-cell
with the lowest short-circuit current.
‹Theoretical analysis of intermediate layer
‹A proper current matching of the series connected
sub-cells is needed.
‹The light-induced stability deteriorates with a rise of
sub-cell thickness in a-Si:H based solar cells.
Improvement of multi-junction solar cell efficiencies by
employing intermediate layers is urgently needed.
‹Preparation of n-µc-SiOx:H Intermediate
layer using a RF-PECVD technique
‹Development of intermediate layer with
novel materials and structures
‹Application to a-Si:H/µc-Si:H tandem cell
and a-SiC(O):H/a-Si(Ge):H/µc-Si:H triple
cell
sunlight
glass
TCO
a - Si:H top cell
SiOx
Intermediate
interlayer
layer
μ c - Si:H
bottom cell
Back reflector
Schematic diagram of a-Si:H/µc-Si:H
Bancha Janthong (M1)
tandem cell with an intermediate layer