Ab initio calculation of pentacene–PbSe hybrid interface for photovoltaic applications

2016 ◽  
Vol 18 (27) ◽  
pp. 18209-18218 ◽  
Author(s):  
P. Roy ◽  
Thao P. Nguyen
Keyword(s):  
Density Functional Theory ◽  
Ab Initio ◽  
Energy Band ◽  
Ab Initio Calculation ◽  
Density Functional ◽  
Band Alignment ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Photovoltaic Applications ◽  
Hybrid Interface

A density functional theory study on the pentacene–PbSe hybrid interface is conducted to construct the energy band alignment for photovoltaic applications.

Energetics of magnetic states in graphene nano-triangles: An ab-initio density functional theory study

2012 ◽  
Author(s):  
Albert K. Dearden ◽  
Swastik Kar ◽  
John Hagopian ◽  
Pulickel M. Ajayan ◽  
Saroj K. Nayak
Keyword(s):  
Density Functional Theory ◽  
Ab Initio ◽  
Density Functional ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Magnetic States

Density Functional Theory Study on Energy Band Gap of Armchair Silicene Nanoribbons with Periodic Nanoholes

MRS Advances ◽  
2016 ◽  
Vol 1 (22) ◽  
pp. 1613-1618 ◽  
Author(s):  
Sadegh Mehdi Aghaei ◽  
Irene Calizo
Keyword(s):  
Density Functional Theory ◽  
Band Gap ◽  
Energy Band ◽  
Quantum Confinement ◽  
Density Functional ◽  
Quantum Confinement Effect ◽  
Density Functional Theory Study ◽  
Energy Band Gap ◽  
Functional Theory ◽  
Silicene Nanoribbons

ABSTRACTIn this study, density functional theory (DFT) is employed to investigate the electronic properties of armchair silicene nanoribbons perforated with periodic nanoholes (ASiNRPNHs). The dangling bonds of armchair silicene nanoribbons (ASiNR) are passivated by mono- (:H) or di-hydrogen (:2H) atoms. Our results show that the ASiNRs can be categorized into three groups based on their width: W = 3P − 1, 3P, and 3P + 1, P is an integer. The band gap value order changes from “EG (3P − 1) < EG (3P) < EG (3P + 1)” to “EG (3P + 1) < EG (3P − 1) < EG (3P)” when edge hydrogenation varies from mono- to di-hydrogenated. The energy band gap values for ASiNRPNHs depend on the nanoribbons width and the repeat periodicity of the nanoholes. The band gap value of ASiNRPNHs is larger than that of pristine ASiNRs when repeat periodicity is even, while it is smaller than that of pristine ASiNRs when repeat periodicity is odd. In general, the value of energy band gap for ASiNRPNHs:2H is larger than that of ASiNRPNHs:H. So a band gap as large as 0.92 eV is achievable with ASiNRPNHs of width 12 and repeat periodicity of 2. Furthermore, creating periodic nanoholes near the edge of the nanoribbons cause a larger band gap due to a strong quantum confinement effect.

Catalytic polymerization of naphthalene by HF/BF3 super acid: an ab initio density functional theory study

2018 ◽  
Vol 20 (36) ◽  
pp. 23311-23319 ◽  
Author(s):  
Po-Yu Yang ◽  
Hsing-Yin Chen ◽  
Shin-Pon Ju ◽  
Chia-Lin Chang ◽  
Gao-Shee Leu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Reaction Mechanism ◽  
Dft Calculations ◽  
Ab Initio ◽  
Density Functional ◽  
Catalytic Polymerization ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Detailed Reaction Mechanism ◽  
Super Acid

The detailed reaction mechanism of naphthalene catalytic polymerization by HF/BF3 has been investigated by DFT calculations and the directionality of the naphthalene-derived mesophase molecule has been explained.

Toward fast and accurate ab initio calculation of magnetic exchange in polynuclear lanthanide complexes

2019 ◽  
Vol 21 (19) ◽  
pp. 9769-9778 ◽  
Author(s):  
Philipp P. Hallmen ◽  
Hans-Joachim Werner ◽  
Daniel Kats ◽  
Samuel Lenz ◽  
Guntram Rauhut ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Ab Initio ◽  
Ab Initio Calculation ◽  
Lanthanide Complexes ◽  
Density Functional ◽  
Lanthanide Ions ◽  
Dynamical Correlation ◽  
Magnetic Exchange ◽  
Functional Theory

We present an efficient ab initio methodology to calculate magnetic exchange between lanthanide ions beyond density functional theory including dynamical correlation.

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