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Effect of ZnO Layer Thickness on Efficiency of Cu(In,Ga)Se-2 Thin-film Solar Cells
- Effect of ZnO Layer Thickness on Efficiency of Cu(In,Ga)Se-2 Thin-film Solar Cells
- Kim, C[Kim, Chan]; Jo, HJ[Jo, Hyun-Jun]; Kim, DH[Kim, Dae-Hwan]; Son, DH[Son, Dae-Ho]; Lee, DH[Lee, Dong-Ha]; Rhee, I[Rhee, Ilsu]
- DGIST Authors
- Kim, C[Kim, Chan]; Jo, HJ[Jo, Hyun-Jun]; Kim, DH[Kim, Dae-Hwan]; Son, DH[Son, Dae-Ho]; Lee, DH[Lee, Dong-Ha]
- Issue Date
- Molecular Crystals and Liquid Crystals, 565, 52-58
- Article Type
- Cadmium Compounds; Cadmium Sulfide; Chemical-Bath Deposition; CIGS Thin Films; Co-Evaporation; Co-Evaporations; Cu(In, Ga)Se; Cu(In, Ga)Se2; Efficiency; Electrical Characteristic; Evaporation; Film Thickness; Gallium; I-ZnO; Layer Thickness; Molybdenum; Phase Transitions; RF-Magnetron Sputtering; Semiconducting Selenium Compounds; Soda Lime Glass; Solar Cell; Solar Cells; Thin-Film Solar Cells; Thin-Films; Vapor Deposition; Zinc Oxide; ZnO; ZnO Layers
- The effect of intrinsic ZnO(i-ZnO) layer thickness on the efficiency of Cu(In,Ga)Se 2 (CIGS) thin film solar cells was investigated using ITO/ZnO/CdS/CIGS/Mo structures. CIGS thin films were deposited on Mo-coated soda-lime glass using co-evaporation. CdS buffer layers of about 50nm thickness were then grown by chemical bath deposition on the top of CIGS layer. Finally, the ZnO and ITO layers were deposited using rf-magnetron sputtering, resulting in solar cells with ITO/ZnO/CdS/CIGS/Mo structure. From the optical and electrical characteristics of the solar cells, we found a close relationship between the transmittance of the ZnO layer and the efficiency of the solar cells. Several characteristics improved for solar cells with a 50 nm thick ZnO layer relative to those with both 90 nm thick and no ZnO layer. Therefore, we conclude that the optimum ZnO thickness for CIGS-based solar cells is around 50 nm. © 2012 Kyungil University.
- Taylor and Francis Ltd.
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