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- W4382024739 abstract "Cu(In,Ga)Se2 (CIGSe) solar cells on soda-lime glass (SLG) substrates were fabricated with the structure of Al/Ni/sputtered Zn0.88Mg0.12O:Al─transparent conductive oxide (TCO)/sputtered Zn1-xMgxO─2nd buffer/CdS─1st buffer/CIGSe/Mo/SLG. The Zn1-xMgxO second buffers are applied to prevent direct contact of the TCO and CIGSe absorber. The impact of the second conduction band offset (CBO2) between the CIGSe absorber and Zn1-xMgxO second buffer on the cell performances and the carrier recombination in the devices were experimentally and theoretically investigated. Actual energy-level diagrams of each layer of the CIGSe solar cells are examined based on photoelectron yield spectroscopy (PYS). It is disclosed that the CBO2 between the CIGSe absorber and Zn1-xMgxO second buffer changes from 0 to +0.8 eV under the Mg content of Zn1-xMgxO second buffer from 0 (pure ZnO) to 0.41. The carrier recombination in the CIGSe device is reduced under the optimization of CBO2 with the Mg content of the Zn1-xMgxO─2nd buffer, which is well consistent with the numerical results. As a result, the band bending is improved, thereby enhancing the conversion efficiency (η) up to 20.0% under optimized CBO2, primarily attributed to the increased short-circuit current density and fill factor. Ultimately, the CIGSe solar cell with an antireflective coating (ARC) layer yielded a conversion efficiency of 21.1% with the optimized CBO2." @default.
- W4382024739 created "2023-06-27" @default.
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- W4382024739 date "2023-06-26" @default.
- W4382024739 modified "2023-09-23" @default.
- W4382024739 title "Influence of Conduction Band Offset between Cu(In,Ga)Se<sub>2</sub> Absorber and Zn<sub>1-x</sub>Mg<sub><i>x</i></sub>O Buffer in Zn<sub>1-x</sub>Mg<sub><i>x</i></sub>O:Al/Zn<sub>1-x</sub>Mg<sub><i>x</i></sub>O/CdS/Cu(In,Ga)Se<sub>2</sub> Solar Cell" @default.
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- W4382024739 doi "https://doi.org/10.1021/acsaem.3c00506" @default.
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