Polymorphism as an emerging design strategy for high performance organic electronics

2016 ◽  
Vol 4 (18) ◽  
pp. 3915-3933 ◽  
Author(s):  
Hyunjoong Chung ◽  
Ying Diao
Keyword(s):  
Charge Transport ◽  
Organic Electronics ◽  
High Performance ◽  
Design Strategy ◽  
Molecular Packing ◽  
Design Tool ◽  
Fundamental Understanding ◽  
Electronic Performance ◽  
The Relationship

In this review, we present a unique perspective of polymorphism as a design tool to enhance electronic performance and fundamental understanding of the relationship between charge transport and molecular packing in organic electronics.

Creation of Face-to-face π-π Stacking of Fused Acene Backbones by Aryl-perfluoroaryl Interactions and Induction of Charge Transport Properties

2011 ◽  
Vol 1360 ◽  
Author(s):  
Toshihiro Okamoto ◽  
Katsumasa Nakahara ◽  
Akinori Saeki ◽  
Shu Seki ◽  
Joon H. Oh ◽  
...  
Keyword(s):  
Solid State ◽  
Charge Transport ◽  
Transport Properties ◽  
Organic Electronics ◽  
High Performance ◽  
Molecular Design ◽  
Structural Defects ◽  
Face To Face ◽  
Π Stacking ◽  
Organic Semiconducting Materials

ABSTRACTThe charge transport properties critically depend on the degree of ordering of the chains in the solid state as well as on the density of chemical or structural defects. In general, goodelectronic performance requires strong electronic coupling between adjace nt molecules in the solid-state that yield strong intermolecular π-overlap. Herein, we newly designed and synthesized organic semiconducting materials having both aryl (Ar) and perfluoroaryl (FAr) as substituents for organic electronics along with molecular packing control. Regarding this molecular design, we hypothesized and expected that the Ar and FAr substituents would induce well-defined π-π stacking structure of charge transport units for high performance organic electronics devices.

Terminal π–π stacking determines three-dimensional molecular packing and isotropic charge transport in an A–π–A electron acceptor for non-fullerene organic solar cells

2017 ◽  
Vol 5 (20) ◽  
pp. 4852-4857 ◽  
Author(s):  
Guangchao Han ◽  
Yuan Guo ◽  
Xiaoxian Song ◽  
Yue Wang ◽  
Yuanping Yi
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Electron Acceptor ◽  
Organic Solar Cells ◽  
High Performance ◽  
Three Dimensional ◽  
Molecular Packing ◽  
Electron Acceptors ◽  
Π Stacking

Three-dimensional molecular packing and isotropic charge transport can be achieved through local π–π stacking between terminal acceptor units for A–π–A electron acceptors toward high-performance non-fullerene organic solar cells.

Super-exchange-induced high performance charge transport in donor–acceptor copolymers

2017 ◽  
Vol 5 (13) ◽  
pp. 3247-3253 ◽  
Author(s):  
Changli Cheng ◽  
Hua Geng ◽  
Yuanping Yi ◽  
Zhigang Shuai
Keyword(s):  
Charge Transport ◽  
High Performance ◽  
High Mobility ◽  
Design Strategy ◽  
Donor Acceptor ◽  
Induced Charge

Super-exchange-induced charge transport is proposed in donor–acceptor copolymers, and the corresponding design strategy for high mobility polymers is put forward.

Flexural design of precast, prestressed ultra-high-performance concrete members

PCI Journal ◽  
2020 ◽  
Vol 65 (6) ◽  
pp. 35-61
Author(s):  
Chungwook Sim ◽  
Maher Tadros ◽  
David Gee ◽  
Micheal Asaad
Keyword(s):  
Prestressed Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
Limit State ◽  
Design Guidelines ◽  
Design Tool ◽  
Supplementary Cementitious Materials ◽  
Ultra High Performance Concrete ◽  
Concrete Members ◽  
Cylinder Strength

Ultra-high-performance concrete (UHPC) is a special concrete mixture with outstanding mechanical and durability characteristics. It is a mixture of portland cement, supplementary cementitious materials, sand, and high-strength, high-aspect-ratio microfibers. In this paper, the authors propose flexural design guidelines for precast, prestressed concrete members made with concrete mixtures developed by precasters to meet minimum specific characteristics qualifying it to be called PCI-UHPC. Minimum specified cylinder strength is 10 ksi (69 MPa) at prestress release and 18 ksi (124 MPa) at the time the member is placed in service, typically 28 days. Minimum flexural cracking and tensile strengths of 1.5 and 2 ksi (10 and 14 MPa), respectively, according to ASTM C1609 testing specifications are required. In addition, strain-hardening and ductility requirements are specified. Tensile properties are shown to be more important for structural optimization than cylinder strength. Both building and bridge products are considered because the paper is focused on capacity rather than demand. Both service limit state and strength limit state are covered. When the contribution of fibers to capacity should be included and when they may be ignored is shown. It is further shown that the traditional equivalent rectangular stress block in compression can still be used to produce satisfactory results in prestressed concrete members. A spreadsheet workbook is offered online as a design tool. It is valid for multilayers of concrete of different strengths, rows of reinforcing bars of different grades, and prestressing strands. It produces moment-curvature diagrams and flexural capacity at ultimate strain. A fully worked-out example of a 250 ft (76.2 m) span decked I-beam of optimized shape is given.

Progress in Organic Crystal Transistors for High-Performance Organic Electronics

2008 ◽  
Author(s):  
Jun Takeya ◽  
Takafumi Uemura ◽  
M. Uno ◽  
Masakazu Yamagishi ◽  
Yukihiro Tominari
Keyword(s):  
Organic Electronics ◽  
High Performance ◽  
Organic Crystal

A Recommender System for Inverse Design of Polycarbonates and Polyesters

2020 ◽  
Author(s):  
Nathaniel Park ◽  
Dmitry Yu. Zubarev ◽  
James L. Hedrick ◽  
Vivien Kiyek ◽  
Christiaan Corbet ◽  
...  
Keyword(s):  
Ring Opening ◽  
High Performance ◽  
Recommendation System ◽  
Polymeric Materials ◽  
Monomer Conversion ◽  
Design Strategy ◽  
Ring Opening Polymerization ◽  
Inverse Design ◽  
False Negatives ◽  
Accelerate Development

The convergence of artificial intelligence and machine learning with material science holds significant promise to rapidly accelerate development timelines of new high-performance polymeric materials. Within this context, we report an inverse design strategy for polycarbonate and polyester discovery based on a recommendation system that proposes polymerization experiments that are likely to produce materials with targeted properties. Following recommendations of the system driven by the historical ring-opening polymerization results, we carried out experiments targeting specific ranges of monomer conversion and dispersity of the polymers obtained from cyclic lactones and carbonates. The results of the experiments were in close agreement with the recommendation targets with few false negatives or positives obtained for each class.<br>

Organic Electronics

2020 ◽  
Author(s):  
Stephen R. Forrest
Keyword(s):  
Thin Film ◽  
Organic Electronics ◽  
Thin Film Transistors ◽  
High Performance ◽  
Electronic Devices ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Organic Thin Film ◽  
Graduate Studies ◽  
Organic Light

Organic electronics is a platform for very low cost and high performance optoelectronic and electronic devices that cover large areas, are lightweight, and can be both flexible and conformable to irregularly shaped surfaces such as foldable smart phones. Organics are at the core of the global organic light emitting device (OLED) display industry, and also having use in efficient lighting sources, solar cells, and thin film transistors useful in medical and a range of other sensing, memory and logic applications. This book introduces the theoretical foundations and practical realization of devices in organic electronics. It is a product of both one and two semester courses that have been taught over a period of more than two decades. The target audiences are students at all levels of graduate studies, highly motivated senior undergraduates, and practicing engineers and scientists. The book is divided into two sections. Part I, Foundations, lays down the fundamental principles of the field of organic electronics. It is assumed that the reader has an elementary knowledge of quantum mechanics, and electricity and magnetism. Background knowledge of organic chemistry is not required. Part II, Applications, focuses on organic electronic devices. It begins with a discussion of organic thin film deposition and patterning, followed by chapters on organic light emitters, detectors, and thin film transistors. The last chapter describes several devices and phenomena that are not covered in the previous chapters, since they lie outside of the current mainstream of the field, but are nevertheless important.

Design strategy of ultrasmall Gd2O3 nanoparticles for T1 MRI with high performance

2021 ◽  
Author(s):  
Jianfeng Yang ◽  
Pengyuan Shan ◽  
Qingling Zhao ◽  
Shuquan Zhang ◽  
Lanlan Li ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Performance ◽  
Design Strategy ◽  
Resonance Imaging ◽  
Relative Time ◽  
Time Parameters ◽  
Gd2o3 Nanoparticles

It is still a big challenge for designing Gd3+ based nanoparticles (NPs) for T1 MRI (Magnetic Resonance Imaging) with high performance and clarifying the effects of relative time parameters for...

Charge transport properties of open-shell graphene fragments: a computational study of the phenalenyl tilings

2021 ◽  
Author(s):  
Wei-Chih Chen ◽  
Ito Chao
Keyword(s):  
Charge Transport ◽  
Transport Properties ◽  
Computational Study ◽  
Design Strategy ◽  
Open Shell

The skeleton of the phenalenyl radical was extended to explore charge-transporting materials. MO-based design strategy successfully leads to graphene-like radicals superior to the phenalenyl radical with different sizes and shapes.

Sign in / Sign up

Export Citation Format

Share Document