Band-gap tuning of graphene by Be doping and Be, B co-doping: a DFT study

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 55762-55773 ◽  
Author(s):  
Saif Ullah ◽  
Akhtar Hussain ◽  
WaqarAdil Syed ◽  
Muhammad Adnan Saqlain ◽  
Idrees Ahmad ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
First Principles ◽  
Density Functional ◽  
Functional Theory ◽  
Co Doping ◽  
Structural And Electronic Properties ◽  
Doped Graphene ◽  
Band Gap Tuning ◽  
Co Doped

First-principles density functional theory (DFT) calculations were carried out to investigate the structural and electronic properties of beryllium (Be) doped and, Be with boron (B) co-doped graphene systems.

Fine tuning the band-gap of graphene by atomic and molecular doping: a density functional theory study

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 55990-56003 ◽  
Author(s):  
Akhtar Hussain ◽  
Saif Ullah ◽  
M. Arshad Farhan
Keyword(s):  
Density Functional Theory ◽  
First Principles ◽  
Density Functional ◽  
Fine Tuning ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Structural And Electronic Properties ◽  
Doped Graphene ◽  
Molecular Doping ◽  
Co Doped

First-principles density functional theory (DFT) based calculations were carried out to investigate the structural and electronic properties of beryllium and nitrogen co-doped and BeN/BeO molecules-doped graphene systems.

scholarly journals Exploring the stability and electronic structure of beryllium and sulphur co-doped graphene: a first principles study

RSC Advances ◽  
2016 ◽  
Vol 6 (91) ◽  
pp. 88392-88402 ◽  
Author(s):  
O. Olaniyan ◽  
R. E. Mapasha ◽  
D. Y. Momodu ◽  
M. J. Madito ◽  
A. A. Kahleed ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
First Principles ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Graphene Sheets ◽  
Functional Theory ◽  
Structural And Electronic Properties ◽  
Doped Graphene ◽  
The Stability ◽  
Co Doped

First principles density functional theory calculations have been performed to explore the stability, structural and electronic properties of Be and S co-doped graphene sheets.

Bandgap control and optical properties of β-Si3N4 by single- and co-doping from a first-principles simulation

2018 ◽  
Vol 32 (14) ◽  
pp. 1850178 ◽  
Author(s):  
Xuefeng Lu ◽  
Xu Gao ◽  
Junqiang Ren ◽  
Cuixia Li ◽  
Xin Guo ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
First Principles ◽  
Density Functional ◽  
Formation Energy ◽  
Blue Shift ◽  
Functional Theory ◽  
Co Doping ◽  
Charge Density Difference ◽  
Co Doped

Bandgap tailoring of [Formula: see text]-Si3N4 is performed by single and co-doping by using density functional theory (DFT) of PBE functional and plane-wave pseudopotential method. The results reveal that a direct bandgap transfers into an indirect one when single-doped with As element. Also, a considerate decrease of bandgap to 0.221 eV and 0.315 eV is present for Al–P and As–P co-doped systems, respectively, exhibiting a representative semiconductor property that is characteristic for a narrower bandgap. Compared with other doped systems, Al-doped system with formation energy of 2.67 eV is present for a more stable structure. From charge density difference (CDD) maps, it is found that the blue area between co-doped atoms increases, illustrating an enhancement of covalent property for Al–P and Al–As bonds. Moreover, a slightly obvious “Blue shift” phenomenon can be obtained in Al, Al–P and Al–As doped systems, indicating an enhanced capacity of responses to light, which contributes to the insight for broader applications with regard to photoelectric devices.

Oxygen reduction reaction mechanism on P, N co-doped graphene: a density functional theory study

2019 ◽  
Vol 43 (48) ◽  
pp. 19308-19317 ◽  
Author(s):  
Zhao Liang ◽  
Chao Liu ◽  
Mingwei Chen ◽  
Xiaopeng Qi ◽  
Pramod Kumar U. ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Dft Calculations ◽  
Density Functional ◽  
Reduction Reaction ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Doped Graphene ◽  
Co Doped

DFT calculations confirmed that the P–N coupled site changed the ORR pathway and improved the catalytic activity compared with single doping.

scholarly journals A study on the synthesis, longitudinal optical phonon–plasmon coupling and electronic structure of Al doped ZnS nanorods

RSC Advances ◽  
2017 ◽  
Vol 7 (20) ◽  
pp. 12382-12390 ◽  
Author(s):  
U. P. Gawai ◽  
U. P. Deshpande ◽  
B. N. Dole
Keyword(s):  
Density Functional Theory ◽  
Electronic Structure ◽  
Dft Calculations ◽  
First Principles ◽  
Density Functional ◽  
Longitudinal Optical ◽  
Plasmon Coupling ◽  
Longitudinal Optical Phonon ◽  
Functional Theory ◽  
Structural And Electronic Properties

First principles density functional theory (DFT) calculations were employed to study the structural and electronic properties of pure and Al doped ZnS nanorods.

A DFT Investigation of the Adsorption of Phosphate Ions on Co- and Ni-Doped Graphene

NANO ◽  
2021 ◽  
pp. 2150105
Author(s):  
Yan Zhang ◽  
Hong Zhang ◽  
Tao Chen ◽  
Zhiming Zhang ◽  
Libao An
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Of States ◽  
Density Functional ◽  
Physical Adsorption ◽  
Partial Density ◽  
Functional Theory ◽  
Phosphate Ions ◽  
Doped Graphene ◽  
Co Doped

In this study, the adsorption of PO[Formula: see text], HPO[Formula: see text], H2PO[Formula: see text] on intrinsic, Co-doped and Ni-doped graphene has been investigated through density functional theory (DFT) calculations. Computing of final adsorption distance, adsorption energy, electron density and partial density of states shows that the adsorption between intrinsic graphene and phosphate ions is weak, and it is only physical adsorption. However, doping graphene with Ni or Co greatly enhances its adsorption with phosphate ions and leads to chemisorption. Combined with the analysis on the variation in conductance, Ni-doped graphene is more sensitive to and thus a promising material for detecting phosphate ions.

Tuning the electronic and optical properties of phosphorene by transition-metal and nonmetallic atom co-doping

RSC Advances ◽  
2016 ◽  
Vol 6 (13) ◽  
pp. 10919-10929 ◽  
Author(s):  
Long-Juan Kong ◽  
Guang-Hua Liu ◽  
Yu-Jun Zhang
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Transition Metal ◽  
First Principles ◽  
Density Functional ◽  
First Principles Calculations ◽  
Functional Theory ◽  
Electronic And Optical Properties ◽  
Co Doping ◽  
Co Doped

The electronic and optical properties of phosphorene co-doped with vanadium and non-metallic atoms (B, C, N and O) are investigated by employing first-principles calculations based on density functional theory.

Prediction of Beryllium Clusters from First Principles: Be17 as a Promising New Material for Water Splitting

2021 ◽  
Author(s):  
Behnaz Abyaz ◽  
Zabiollah Mahdavifar ◽  
Georg Schreckenbach ◽  
Yang Gao
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Water Splitting ◽  
First Principles ◽  
Density Functional ◽  
Global Minimum ◽  
Functional Theory ◽  
New Material ◽  
Universal Structure

Evolutionary searches using the USPEX method (Universal Structure Predictor: Evolutionary Xtallography) combined with density functional theory (DFT) calculations were performed to obtain the global minimum structures of beryllium (Ben, n=3-25)...

Low-dimensional HfS2 as SO2 adsorbent and gas sensor: Effect of water and sulfur vacancies

2021 ◽  
Author(s):  
Amina Bouheddadj ◽  
Tarik Ouahrani ◽  
Gbèdodé Wilfried KANNHOUNON ◽  
Boufatah Reda ◽  
Sumeya Bedrane ◽  
...  
Keyword(s):  
Climate Change ◽  
Density Functional Theory ◽  
Dft Calculations ◽  
Gas Sensor ◽  
First Principles ◽  
Density Functional ◽  
Two Dimensional ◽  
Functional Theory ◽  
Sensor Effect ◽  
Low Dimensional

First-principles based on density functional theory (DFT) calculations were performed to investigate the interaction of two-dimensional (2D) HfS2 with SO2, a harmful gas with implications for climate change. In particular,...

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