Thin film cadmium telluride absorbers with cadmium sulphide
hetero-junction partner are promising candidates for high
efficiency low cost solutions of solar energy harvesting devices.
These devices have band gaps well-suited for effective absorption
of sunlight. Most importantly, the materials used in these devices
can be deposited in a variety of industry-friendly ways, so that
the cost associated with manufacturing is generally lower than
other available technologies. Although poly-crystalline CdS has
been found to be the best suited heterojunction partner for CdTe
solar cell, the conventional polycrystalline CdS/CdTe cell has few
issues that limit device performance. In order to overcome these
problems, this study proposes the introduction of poly-CdS to
amorphous oxygenated CdS (a-CdS: O) as window layer. The a-CdS: O
window material has higher optical band gap (2.5-3.1 eV), better
lattice match with CdTe absorber materials and reduced
inter-diffusion tendency of CdS and CdTe layers. This book
systematically demonstrates the conversion process of poly CdS to
a-CdS: O and develops a strategy for the fabrication of suitable
a-CdS: O layer to be applied in CdTe solar ce
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