[15a-2J-1~8] 6.4 Thin films and New materials

▼ [15a-2J-8] Physical properties of novel Cu_1-xCd_xS₂ thin films grown by chemical bath deposition method for low cost solar cell

〇NirmalKumar Velu^1,2, Gopalakrishnan R², Suriakarthick R², Yaushiro Hayakawa¹ (1.RIE Shizuoka Univ, 2.Anna University Univ.)

Keywords:Cu1-xCdxS2,thin films,solar cell

Thin films of Cu_1-xCd_xS₂ were prepared with various compositions by chemical bath deposition method in single step at room temperature. The Cu_1-xCd_xS₂ thin films exhibited two different type conductivities, p and n-type owing to composition of cations. Physical properties of Cu_1-xCd_xS₂ thin films can be tuned between Cu_xS and CdS to get desired properties. Cu_1-xCd_xS₂ thin films with Cu and Cd rich compositions had wider absorption region, p and n-type conductivities, higher carrier concentration and tuneable band gap between Cu₂S and CdS. Therefore this material is suitable for photovoltaic applications and it can perform the role of both p-type and n-type semiconductor based on their composition.