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Evolution of photovoltaic parameters of three different p-i-n solar cells during the light-soaking under a halogen lamp illumination at 2 suns. All three cells are fabricated on LPCVD ZnO using sputtered ZnO-Ag back contacts; their p-i-n structures are shown at the top of graph. Note that the J-V-characteristics are measured using the same halogen lamp at 1 sun and 50 °C.
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