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The long term performance of Cu(In, Ga)Se2 (CIGS) solar cells were strongly affected by their ability in withstanding surrounding weather change, including temperature, humidity, and light, etc. In our experiment, we focused on the stability study of window layer materials of undoped ZnO (IZO) and Al:ZnO (AZO) using damp heat and dry heat treatment. We found that the Al dopant had enhanced the capture...
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