被撤回的出版物: Optical properties of two-dimensional GaS and GaSe monolayers (Retracted article. See vol. 139, 2022)

Optical properties of GaS and GaSe monolayers are investigated using first-principles calculations. The optical properties are studied up to 35 eV. Precisely, our results demonstrated that the optical properties appearance of GaS monolayer is comparative with GaSe monolayer with few informations contrasts. Moreover, the absorption begins in the visible region, although the peaks in the ultraviolet (UV) region. The refractive index values are 1.644 (GaS monolayer) and 2.01 (GaSe monolayer) at zero photon energy limit and increase to 2.092 and 2.698 respectively and both located in the visible region. Furthermore, we notice that the optical properties of both monolayers are obtained in the ultraviolet range and the results are significant. Accordingly, it can be used as a highly promising material in the solar cell, ultraviolet optical nanodevices, nanoelectronics, optoelectronic, and photocatalytic applications.