Investigation of Optical Properties of (2, 2) Zigzag Graphdiyne Nanotube in the Presence of Lithium and Nitrogen Dopant: Density Functional Theory Approach

2020 ◽  
Vol 18 (2) ◽  
pp. 62-66
Author(s):  
Ameera Jawad Kadhim
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Density Functional ◽  
Theory Approach ◽  
Functional Theory

scholarly journals Tuning the optoelectronic properties of hematite with rhodium doping for photoelectrochemical water splitting using density functional theory approach

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Abdur Rauf ◽  
Muhammad Adil ◽  
Shabeer Ahmad Mian ◽  
Gul Rahman ◽  
Ejaz Ahmed ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Optical Absorption ◽  
Water Splitting ◽  
Density Functional ◽  
Formation Energy ◽  
Visible Region ◽  
Photoelectrochemical Water Splitting ◽  
Theory Approach ◽  
Functional Theory

AbstractHematite (Fe2O3) is one of the best candidates for photoelectrochemical water splitting due to its abundance and suitable bandgap. However, its efficiency is mostly impeded due to the intrinsically low conductivity and poor light absorption. In this study, we targeted this intrinsic behavior to investigate the thermodynamic stability, photoconductivity and optical properties of rhodium doped hematite using density functional theory. The calculated formation energy of pristine and rhodium doped hematite was − 4.47 eV and − 5.34 eV respectively, suggesting that the doped material is thermodynamically more stable. The DFT results established that the bandgap of doped hematite narrowed down to the lower edge (1.61 eV) in the visible region which enhanced the optical absorption and photoconductivity of the material. Moreover, doped hematite has the ability to absorb a broad spectrum (250–800) nm. The enhanced optical absorption boosted the photocurrent and incident photon to current efficiency. The calculated results also showed that the incorporation of rhodium in hematite induced a redshift in optical properties.

Optical properties of ideal γ-Al2O3 and with oxygen point defects: an ab initio study

RSC Advances ◽  
2015 ◽  
Vol 5 (68) ◽  
pp. 55088-55099 ◽  
Author(s):  
H. Papi ◽  
S. Jalali-Asadabadi ◽  
A. Nourmohammadi ◽  
Iftikhar Ahmad ◽  
J. Nematollahi ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Ab Initio ◽  
Point Defects ◽  
Density Functional ◽  
Theory Approach ◽  
Ab Initio Study ◽  
Functional Theory ◽  
The Density Functional Theory

The optical properties of pure γ-Al2O3 and in the presence of oxygen point defects are investigated by the density functional theory approach using the PBE-GGA and TB-mBJ-GGA schemes.

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