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- W4308201154 abstract "The effects of an oxygen vacancy (Ov), and chalcogens impurities on electronic, optical properties, thermodynamic stability, and photocatalytic hydrogen production form water splitting ability of non-toxic lead-free calcium zirconate perovskite CaZrO 3 are investigated using first-principles calculations-based Density Functional Theory and LDA+TB-mBJ functional. It is found that an Ov itself in CaZrO 3 compound results of free electrons inside the unoccupied states in CB which changed the type of electrical conductivity from p to n-type. Besides, the wide forbidden band energy of CaZrO 3 was effectively reduced when chalcogens impurities doped CaZrO 3 with the presence of an Ov. Furthermore, the optical properties show that the percentage of the transmittance reduced while the absorption coefficient’s percentage increased along the visible spectrum in all structures having an Ov, suggesting that Ov creates free charge carriers in the CaZrO 3 compound. In Addition, the formation energy confirms that all studied structures are thermodynamically stables. Finley, S/Se@OI/OII/OIII+Ov structures are promising photocatalysts to drive water splitting reactions as they are distinguished by their appropriate forbidden bands, visible light absorption, and band edge positions. We believe that our study could be used to give CaZrO 3 the opportunity to be used as a semiconductor for photovoltaic and photocatalytic applications." @default.
- W4308201154 created "2022-11-09" @default.
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- W4308201154 date "2022-12-01" @default.
- W4308201154 modified "2023-10-14" @default.
- W4308201154 title "An oxygen vacancy defect and chalcogens impurities in earth-abundant lead-free calcium zirconate perovskite for non-toxic solar cells: First-principles calculations" @default.
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- W4308201154 doi "https://doi.org/10.1016/j.mtcomm.2022.104847" @default.
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