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Cu2ZnSnSe4 thin films for photovoltaic devices have been fabricated by a single-step thermal evaporation process from synthesized Cu2ZnSnSe4 ingots and Na2Se powder. The obtained X-ray diffraction patterns revealed the presence of Cu2ZnSnSe4 and SnSe phases in all studied samples; however, the second phase disappeared after sample annealing at 500°C for 30min under mixed Sn/Se atmosphere. According...
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