Details

Autor(en) / Beteiligte

• Azam, Sikandar
• Imran, Muhammad
• Rahman, Amin Ur
• Nadeem, Asif
• Neffati, Riadh

Titel

Electronic and optical properties of quaternary selenides for optoelectronic applications: Insights from DFT+U‐computations

Ist Teil von

• International journal of quantum chemistry, 2023-02, Vol.123 (3), p.n/a

Ort / Verlag

Hoboken, USA: John Wiley & Sons, Inc

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• The optical properties, electronic charge density, electronic structure of the new layered selenides materials, BaGdCuSe3, CsUCuSe3, CsZrCuSe3, and CsGdZnSe3 compounds have been calculated by using the full potential and linear augmented plane wave (FP‐LAPW) methods as applied in the WIEN2k package, which is based on the density functional theory. The ALnMSe3 compound's structure of these was (A = Cs, Ba; Ln = Zr, Gd, U; M = Cu, Zn) is composed of (n = 1, 2) layers, which might be separated by A atoms. It is to be observed that there is strong hybridization between the s, p, and d states of Zr, Gd, and Cu atoms. Around the gadolinium atom, the charge density contours are completely circular, but the Gadolinium “Gd” atom shows an ionic nature. To calculate the refractive index, we used Kramer's Kronig correlations with the imaginary part dielectric function. The decrease in the refractive index is due to the lack of probability for direct excitation of the electrons, resulting in a loss of energy. The value of the static refractive index for all reference compounds is about 1.75–2.25, which is indication that the material used in optoelectronic devices. Unit cell structure for BaGdCuSe3, CsUCuSe3, CsZrCuSe3, and CsGdZnSe3.