Sung Chan Park, B. Han, J. Ahn, B. Ahn, Donghwan Kim
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引用次数: 1
Abstract
To increase grain size, solution-grown CdS films were annealed at 560/spl deg/C in a (CdCl/sub 2/+CdS) atmosphere, instead of CdCl/sub 2/ only environment. CdS was used to prevent the evaporation of CdS from the films. After 5 min annealing, the grain size increased from 10 nm to 100 nm and the surface morphology was very smooth and densely packed. The optical transmittance was greatly improved near E/sub g/, compared to that of CdS films annealed at 400/spl deg/C for 30 min in H/sub 2/. The efficiency of the CdTe solar cell was improved by fabricating with the CdS layer annealed in a (CdCl/sub 2/+CdS) atmosphere. The increase of the efficiency was mainly due to the increase of fill factor, which might be due to the decrease of defects at CdTe bulk and the CdS/CdTe interface.
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