I would like to use this material as a sensitizer for TiO2 solar cell. But i dont know the Conduction band edge and valance band edge of Cu3Se2 material. I read some literature..but not found anywhere...please tell me how to find these edges energy. If any body have literature belongs to this topic please give me...

 I read in one literature if we know the electronegativity then we can find.....So what is the electronegativity of Cu3Se2?. please

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