A direct comparison of monomeric vs. dimeric and non-annulated vs. N-annulated perylene diimide electron acceptors for organic photovoltaics

2019 ◽  
Vol 43 (13) ◽  
pp. 5187-5195 ◽  
Author(s):  
Maryam Nazari ◽  
Edward Cieplechowicz ◽  
Thomas A. Welsh ◽  
Gregory C. Welch
Keyword(s):  
Organic Photovoltaics ◽  
Electron Acceptors ◽  
Perylene Diimide ◽  
Function Evaluation ◽  
Structure Property ◽  
Photoactive Materials ◽  
Systematic Structure

A systematic structure–property-function evaluation of four structurally related organic photoactive materials based on the perylene diimide chromophore.

scholarly journals Fullerene Dissymmetrization as a Means to Achieve Single Enantiomer Electron Acceptors with Maximized Chiroptical Responsiveness

2020 ◽  
Author(s):  
Wenda Shi ◽  
Francesco Salerno ◽  
Alejandro Santana-Bonilla ◽  
Matthew Ward ◽  
Xueyan Hou ◽  
...  
Keyword(s):  
Electronic Materials ◽  
Light Response ◽  
Electron Acceptors ◽  
Fullerene Cage ◽  
Structure Property ◽  
Organic Electronic Devices ◽  
Organic Electronic ◽  
Structure Property Relationships ◽  
Organic Electronic Materials ◽  
Fast Light

<p>Solubilized fullerene derivatives have revolutionised the development of organic photovoltaic devices, acting as excellent electron acceptors. The addition of solubilizing addends to the fullerene cage results in a large number of isomers, which are generally employed as isomeric mixtures. Moreover, a significant number of these isomers are chiral, which further adds to the isomeric complexity. The opportunities presented by single isomer, and particularly single enantiomer, fullerenes in organic electronic materials and devices are poorly understood. Here we separate 10 pairs of enantiomers from the 19 structural isomers of bis[60]PCBM, using them to elucidate important chiroptical structure-property relationships and demonstrating their application to a single enantiomer circularly polarized (CP) light detecting device. We find that larger chiroptical responses occur through inherent chirality of the fullerene cage and particularly through transitions with low CT character. When used in a single enantiomer organic field-effect transistor device, we demonstrate the potential to discriminate CP light with a fast light response time and with a very high photocurrent dissymmetry factor (<i>g<sub>ph</sub></i> = ±1.35). Our study thus provides key strategies to design fullerenes with large chiroptical responses for use as single enantiomer components of organic electronic devices. We anticipate that our data will position chiral fullerenes as an exciting material class for the growing field of chiral electronic technologies.</p>

Additive manufacturing of ceramics: Present status and future perspectives

2021 ◽  
Author(s):  
Mainak Saha ◽  
Manab Mallik
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Microstructure Evolution ◽  
Review Article ◽  
Low Density ◽  
Structure Property ◽  
Future Perspectives ◽  
Structural Applications ◽  
Systematic Structure ◽  
State Of Research

At present, fabrication of ceramics using AM-based techniques mainly suffers from two primary limitations, viz: (i) low density and (ii) poor mechanical properties of the finished components. It is worth mentioning that the present state of research in the avenue of AM-based ceramics is focussed mainly on fabricating ceramic and cermet components with enhanced densities and improved mechanical properties. However, to the best of the authors’ knowledge, not much is known about the microstructure evolution and its correlation with the mechanical properties of the finished parts. Addressing the aforementioned avenue is highly essential for understanding the utilisation of these components for structural applications. To this end, the present review article is aimed to address the future perspectives in this avenue has been provided with a special emphasis on the need to establish a systematic structure-property correlation in these materials.

Additive manufacturing of ceramics and cermets: present status and future perspectives

2021 ◽  
Author(s):  
Mainak Saha ◽  
Manab Mallik
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Present Status ◽  
Interdisciplinary Research ◽  
Low Density ◽  
Metallic Materials ◽  
Structure Property ◽  
Future Perspectives ◽  
Present Decade ◽  
Systematic Structure

The present decade has witnessed a huge volume of research revolving around a number of Additive Manufacturing (AM) techniques, especially for the fabrication of different metallic materials. However, fabrication of ceramics and cermets using AM-based techniques mainly suffers from two primary limitations which are: (i) low density and (ii) poor mechanical properties of the final components. Although there has been a considerable volume of work on AM based techniques for manufacturing ceramic and cermet parts with enhanced densities and improved mechanical properties, however, there is limited understanding on the correlation of microstructure of AM-based ceramic and cermet components with the mechanical properties. The present article is aimed to review some of the most commonly used AM techniques for the fabrication of ceramics and cermets. This has been followed by a brief discussion on the microstructural developments during different AM-based techniques. In addition, an overview of the challenges and future perspectives, mainly associated with the necessity towards developing a systematic structure-property correlation in these materials has been provided based on three factors viz. the efficiency of different AM-based fabrication techniques (involved in ceramic and cermet research), an interdisciplinary research combining ceramic research with microstructural engineering and commercialisation of different AM techniques based on the authors’ viewpoints.

Novel Star-Shaped Helical Perylene Diimide Electron Acceptors for Efficient Additive-Free Nonfullerene Organic Solar Cells

2018 ◽  
Vol 10 (33) ◽  
pp. 27894-27901 ◽  
Author(s):  
Mingliang Wu ◽  
Jian-Peng Yi ◽  
Li Chen ◽  
Guiying He ◽  
Fei Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Electron Acceptors ◽  
Perylene Diimide

scholarly journals Systematic Structure–Property Relationship Studies in Palladium-Catalyzed Methane Complete Combustion

ACS Catalysis ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 7810-7821 ◽  
Author(s):  
Joshua J. Willis ◽  
Alessandro Gallo ◽  
Dimosthenis Sokaras ◽  
Hassan Aljama ◽  
Stanislaw H. Nowak ◽  
...  
Keyword(s):  
Structure Property ◽  
Complete Combustion ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Palladium Catalyzed ◽  
Systematic Structure

Novel perylene diimide based polymeric electron-acceptors containing ethynyl as the π-bridge for all-polymer solar cells

2017 ◽  
Vol 45 ◽  
pp. 227-233 ◽  
Author(s):  
Huan Chang ◽  
Zhiming Chen ◽  
Xiye Yang ◽  
Qingwu Yin ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polymer Solar Cells ◽  
Electron Acceptors ◽  
Perylene Diimide

scholarly journals Conformationally-restricted bicarbazoles with phenylene bridges displaying deep-blue emission and high triplet energies: systematic structure–property relationships

2018 ◽  
Vol 20 (17) ◽  
pp. 11867-11875 ◽  
Author(s):  
Iain A. Wright ◽  
Hameed A. Al-Attar ◽  
Andrei S. Batsanov ◽  
Andrew P. Monkman ◽  
Martin R. Bryce
Keyword(s):  
Blue Emission ◽  
Structure Property ◽  
Conformationally Restricted ◽  
Deep Blue ◽  
Structure Property Relationships ◽  
Systematic Structure

Twelve bicarbazole derivatives with emission ranging from blue-green to deep-blue, and ET 2.6–3.0 eV.

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