Semiaromatic Polyamides with Enhanced Charge Carrier Mobility

2021 ◽  
Author(s):  
Bilal Oezen ◽  
Nicolas Candau ◽  
Cansel Temiz ◽  
Ferdinand Grozema ◽  
Gregory Stoclet ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Optoelectronic Properties ◽  
Local Order ◽  
Polymer Semiconductors ◽  
Non Covalent Interactions ◽  
Covalent Interactions

The control of local order in polymer semiconductors using non-covalent interactions may be used to engineer materials with interesting combinations of mechanical and optoelectronic properties. To investigate the possibility of...

Approaching high charge carrier mobility by alkylating both donor and acceptor units at the optimized position in conjugated polymers

2016 ◽  
Vol 7 (24) ◽  
pp. 4046-4053 ◽  
Author(s):  
Dong Gao ◽  
Kui Tian ◽  
Weifeng Zhang ◽  
Jianyao Huang ◽  
Zhihui Chen ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Conjugated Polymers ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
High Charge ◽  
Polymer Semiconductors ◽  
Donor And Acceptor ◽  
High Charge Carrier Mobility

A strategy for obtaining improved OFET mobility in both donor and acceptor alkylated polymer semiconductors.

scholarly journals Conformational disorder of organic cations tunes the charge carrier mobility in two-dimensional organic-inorganic perovskites

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chuanzhao Li ◽  
Jin Yang ◽  
Fuhai Su ◽  
Junjun Tan ◽  
Yi Luo ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Molecular Conformation ◽  
Strong Dependence ◽  
Charge Carrier Mobility ◽  
Optoelectronic Properties ◽  
Organic Cations ◽  
Two Dimensional ◽  
Broadband Emission ◽  
Conformational Order

Abstract The chemical nature of the organic cations governs the optoelectronic properties of two-dimensional organic-inorganic perovskites. But its mechanism is not fully understood. Here, we apply femtosecond broadband sum frequency generation vibrational spectroscopy to investigate the molecular conformation of spacer organic cations in two-dimensional organic-inorganic perovskite films and establish a correlation among the conformation of the organic cations, the charge carrier mobility, and broadband emission. Our study indicates that both the mobility and broadband emission show strong dependence on the molecular conformational order of organic cations. The gauche defect and local chain distortion of organic cations are the structural origin of the in-plane mobility reduction and broad emission in two-dimensional organic-inorganic perovskites. Both of the interlayer distance and the conformational order of the organic cations affect the out-of-plane mobility. This work provides molecular-level understanding of the conformation of organic cations in optimizing the optoelectronic properties of two-dimensional organic-inorganic perovskites.

scholarly journals Nanoporous and nonporous conjugated donor–acceptor polymer semiconductors for photocatalytic hydrogen production

2021 ◽  
Vol 12 ◽  
pp. 607-623
Author(s):  
Zhao-Qi Sheng ◽  
Yu-Qin Xing ◽  
Yan Chen ◽  
Guang Zhang ◽  
Shi-Yong Liu ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Electronic Properties ◽  
High Performance ◽  
Carrier Mobility ◽  
Material Design ◽  
Charge Carrier Mobility ◽  
Polymer Semiconductors ◽  
Optical And Electronic Properties ◽  
Donor Acceptor ◽  
Catalytic Mechanisms

Conjugated polymers (CPs) as photocatalysts have evoked substantial interest. Their geometries and physical (e.g., chemical and thermal stability and solubility), optical (e.g., light absorption range), and electronic properties (e.g., charge carrier mobility, redox potential, and exciton binding energy) can be easily tuned via structural design. In addition, they are of light weight (i.e., mainly composed of C, N, O, and S). To improve the photocatalytic performance of CPs and better understand the catalytic mechanisms, many strategies with respect to material design have been proposed. These include tuning the bandgap, enlarging the surface area, enabling more efficient separation of electron–hole pairs, and enhancing the charge carrier mobility. In particular, donor–acceptor (D–A) polymers were demonstrated as a promising platform to develop high-performance photocatalysts due to their easily tunable bandgaps, high charge carrier mobility, and efficient intramolecular charge transfer. In this minireview, recent advances of D–A polymers in photocatalytic hydrogen evolution are summarized with a particular focus on modulating the optical and electronic properties of CPs by varying the acceptor units. The challenges and prospects associated with D–A polymer-based photocatalysts are described as well.

The Influence of Nitrogen Position on Charge Carrier Mobility in Enantiopure Aza[6]helicene Crystals

2018 ◽  
Author(s):  
Francesco Salerno ◽  
Beth Rice ◽  
Julia Schmidt ◽  
Matthew J. Fuchter ◽  
Jenny Nelson ◽  
...  
Keyword(s):  
Solid State ◽  
Charge Carrier ◽  
Carrier Mobility ◽  
Chemical Structure ◽  
Crystal Packing ◽  
Charge Carrier Mobility ◽  
Individual Factor ◽  
Charge Mobility ◽  
Order Of Magnitude ◽  
Small Change

<p>The properties of an organic semiconductor are dependent on both the chemical structure of the molecule involved, and how it is arranged in the solid-state. It is challenging to extract the influence of each individual factor, as small changes in the molecular structure often dramatically change the crystal packing and hence solid-state structure. Here, we use calculations to explore the influence of the nitrogen position on the charge mobility of a chiral organic molecule when the crystal packing is kept constant. The transfer integrals for a series of enantiopure aza[6]helicene crystals sharing the same packing were analysed in order to identify the best supramolecular motifs to promote charge carrier mobility. The regioisomers considered differ only in the positioning of the nitrogen atom in the aromatic scaffold. The simulations showed that even this small change in the chemical structure has a strong effect on the charge transport in the crystal, leading to differences in charge mobility of up to one order of magnitude. Some aza[6]helicene isomers that were packed interlocked with each other showed high HOMO-HOMO integrals (up to 70 meV), whilst molecules arranged with translational symmetry generally afforded the highest LUMO-LUMO integrals (40 - 70 meV). As many of the results are not intuitively obvious, a computational approach provides additional insight into the design of new semiconducting organic materials.</p>

Assembly effect on the charge carrier mobility in quaterthiophene-based n/p-materials

2019 ◽  
Vol 7 (22) ◽  
pp. 6649-6655
Author(s):  
A. López-Andarias ◽  
C. Atienza ◽  
J. López-Andarias ◽  
W. Matsuda ◽  
T. Sakurai ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Self Assembly ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Assembly Process ◽  
Charge Mobility

Effect of the peptide-based quaterthiophene self-assembly process on the charge mobility properties of the n/p-materials formed is studied.

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