High-Throughput Pressure-Dependent Density Functional Theory Investigation of Herringbone Polycyclic Aromatic Hydrocarbons: Part 2. Pressure-Dependent Electronic Properties
High-Throughput Pressure-Dependent Density Functional Theory Investigation of Herringbone Polycyclic Aromatic Hydrocarbons: Part 2. Pressure-Dependent Electronic Properties
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人字形多环芳烃的高通量压力依赖性密度泛函理论研究:第 2 部分:压力依赖性电子特性
DOI:
10.1021/acs.jpcc.8b07307
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Schatschneider, Bohdan
中科院分区:
文献类型:
--
作者:
Hammouri, Mahmoud;Garcia, Taylor M.;Cook, Cameron;Monaco, Stephen;Jezowski, Sebastian;Marom, Noa;Schatschneider, Bohdan
Understanding the effect intermolecular interactions have on the electronic properties of highly conjugated/aromatic organic networks is important for optimizing these materials for optoelectronic device applications. Here, dispersion inclusive density functional theory (DFT + vdW) is used to study the effect of pressure up to 20 GPa on the intermolecular interactions of 40 herringbone polycyclic aromatic hydrocarbons. In the first part of this two-part study (10.1021/acs.jpcc.8b07209), we reported the pressure-induced structural changes. Here, we elucidate the relation between those structural changes and the electronic properties, where it is shown that increased pressure leads to variations in the intermolecular interactions and molecular conformations, resulting in alterations of the band dispersion, band gap (magnitude as well as direct/indirect), and semiconductor polarity (n-type vs p-type). Specifically, increased pressure increases the C–H···π and π···π interactions, typically leading to increased intermolecular orbital overlap of the frontier molecular orbitals, resulting in increased intermolecular coupling and band dispersion. In general, the increased intermolecular coupling and band dispersion yields decreased band gaps and increased crystalline polarizabilities, although some variation in these trends occur. The majority of structures follow similar trends. However, some exhibit anomalous pressure responses, including switching between n-type and p-type polarity, transitions between direct/indirect gaps, and discontinuities in the pressure-dependent band gap curves.
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影响因子:
41.2
作者:
Feng, Xinliang;Marcon, Valentina;Muellen, Klaus
通讯作者:
Muellen, Klaus
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Bohdan Schatschneider;Jian;S. Jezowski;A. Tkatchenko
通讯作者:
A. Tkatchenko
DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
C. C. Chiang;I. Paul
通讯作者:
I. Paul
DOI:
10.1021/acs.jpcc.8b07209
发表时间:
2018-09
期刊:
The Journal of Physical Chemistry C
影响因子:
--
作者:
M. Hammouri;Taylor M. Garcia;C. Cook;Stephen Monaco;S. Jezowski;N. Marom;Bohdan Schatschneider
通讯作者:
M. Hammouri;Taylor M. Garcia;C. Cook;Stephen Monaco;S. Jezowski;N. Marom;Bohdan Schatschneider
影响因子:
16.6
作者:
Casati N;Kleppe A;Jephcoat AP;Macchi P
通讯作者:
Macchi P