Acceptor–donor–acceptor type molecules for high performance organic photovoltaics – chemistry and mechanism

2020 ◽  
Vol 49 (9) ◽  
pp. 2828-2842 ◽  
Author(s):  
Xiangjian Wan ◽  
Chenxi Li ◽  
Mingtao Zhang ◽  
Yongsheng Chen
Keyword(s):  
Organic Photovoltaics ◽  
High Performance ◽  
Chemical Structure ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Donor Acceptor

The chemical structure–property relationships and mechanism for high performance organic photovoltaics of acceptor–donor–acceptor type molecules are discussed.

Structure−Property Relationships of Donor/Acceptor-Functionalized Tetrakis(phenylethynyl)benzenes and Bis(dehydrobenzoannuleno)benzenes

2005 ◽  
Vol 127 (8) ◽  
pp. 2464-2476 ◽  
Author(s):  
Jeremiah A. Marsden ◽  
Jeremie J. Miller ◽  
Laura D. Shirtcliff ◽  
Michael M. Haley
Keyword(s):  
Structure Property ◽  
Structure Property Relationships ◽  
Donor Acceptor

Structure–property relationships of high-performance polyethylene fibres

1989 ◽  
Vol 116 (1) ◽  
pp. 179-195 ◽  
Author(s):  
A. Schaper ◽  
D. Zenke ◽  
E. Schulz ◽  
R. Hirte ◽  
M. Taege
Keyword(s):  
High Performance ◽  
Structure Property ◽  
Structure Property Relationships

Elastomeric Polyether-Ester Block Copolymers. I. Structure-Property Relationships of Tetramethylene Terephthalate/Polyether Terephthalate Copolymers

1977 ◽  
Vol 50 (4) ◽  
pp. 688-703 ◽  
Author(s):  
J. R. Wolfe
Keyword(s):  
Phase Separation ◽  
Melting Point ◽  
Block Copolymers ◽  
Low Temperature ◽  
Chain Length ◽  
Chemical Structure ◽  
High Water ◽  
Structure Property ◽  
Tear Strength ◽  
Structure Property Relationships

Abstract The properties of elastomeric tetramethylene terephthalate/polyether terephthalate copolymers have been related to the chemical structure, chain length, and concentration in the copolymers of the PTMEG-, PEG-, and PPG-derived polyether units. Low-temperature properties and tear strength are dependent on all three polyether-related variables. Melting point, hardness, and stress at 100% elongation appear to be independent of polyether structure. Polyether glycols of low MW volatilize during copolymer preparation. High-MW polyethers tend to crystallize when present in the copolymers. Polyether glycols of intermediate MW (∼ 1000) yield copolymers with the best resistance to low-temperature stiffening. Copolymer synthesis is most difficult with PPG as the polyether glycol. Inherent viscosities are low, and phase separation occurs at lower polyether MW than with PTMEG or PEG. The PEG-based copolymers exhibit high water swell, particularly at intermediate and high PEG MW. The PTMEG-based copolymers are easiest to synthesize and exhibit the best overall combination of properties.

scholarly journals Fused Filament Fabrication of PEEK: A Review of Process-Structure-Property Relationships

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1665 ◽  
Author(s):  
Ali Reza Zanjanijam ◽  
Ian Major ◽  
John G. Lyons ◽  
Ugo Lafont ◽  
Declan M. Devine
Keyword(s):  
High Performance ◽  
Space Station ◽  
Weight Ratio ◽  
High Strength ◽  
Structure Property ◽  
Fused Filament Fabrication ◽  
Space Applications ◽  
Structure Property Relationships ◽  
Complex Design ◽  
Process Structure

Poly (ether ether ketone) (PEEK) is a high-performance engineering thermoplastic polymer with potential for use in a variety of metal replacement applications due to its high strength to weight ratio. This combination of properties makes it an ideal material for use in the production of bespoke replacement parts for out-of-earth manufacturing purposes, in particular on the International Space Station (ISS). Additive manufacturing (AM) may be employed for the production of these parts, as it has enabled new fabrication pathways for articles with complex design considerations. However, AM of PEEK via fused filament fabrication (FFF) encounters significant challenges, mostly stemming from the semi crystalline nature of PEEK and its associated high melting temperature. This makes PEEK highly susceptible to changes in processing conditions which leads to a large reported variation in the literature on the final performance of PEEK. This has limited the adaption of FFF printing of PEEK in space applications where quality assurance and reproducibility are paramount. In recent years, several research studies have examined the effect of printing parameters on the performance of the 3D-printed PEEK parts. The aim of the current review is to provide comprehensive information in relation to the process-structure-property relationships in FFF 3D-printing of PEEK to provide a clear baseline to the research community and assesses its potential for space applications, including out-of-earth manufacturing.

QSPR Prediction of Retention Times of Methylxanthines and Cotinine by Bioplastic Evolution

2018 ◽  
Vol 3 (1) ◽  
pp. 74-87 ◽  
Author(s):  
Francisco Torrens ◽  
Gloria Castellano
Keyword(s):  
High Performance ◽  
Formation Enthalpy ◽  
Fractal Dimensions ◽  
High Performance Liquid Chromatographic ◽  
Chromatographic Retention ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Prediction Of Retention ◽  
Acquired Characters ◽  
Liquid Chromatographic

High-performance liquid-chromatographic retention times of methylxanthines and cotinine in human plasma and urine are modelled by structure–property relationships. Bioplastic evolution is an evolutionary perspective conjugating the effect of acquired characters, and relations that emerge among the principles of evolutionary indeterminacy, morphological determination and natural selection. It is applied to design co-ordination index, which is used to characterize retentions of methylxanthines, etc. Parameters used to calculate co-ordination index are formation enthalpy, molecular weight and surface area. Morphological and co-ordination indices provide strong correlations. Effect of different types of features like thermodynamic, fractal, etc., are analyzed. The molar formation enthalpy, fractal dimensions, etc. distinguished methylxanthines and cotinine in linear fits. Different behaviour depends on number of C+N+O atoms.

scholarly journals Structure–property relationships for bis-diketopyrrolopyrrole molecules in organic photovoltaics

2016 ◽  
Vol 4 (27) ◽  
pp. 10532-10541 ◽  
Author(s):  
Qiang (Mike) Wang ◽  
Jacobus J. van Franeker ◽  
Bardo J. Bruijnaers ◽  
Martijn M. Wienk ◽  
René A. J. Janssen
Keyword(s):  
Solar Cell ◽  
Organic Photovoltaics ◽  
Cell Performance ◽  
Structure Property ◽  
Solar Cell Performance ◽  
Structure Property Relationships

By comparing the morphology and solar cell performance it is possible to identify structure–property relationships for bis-diketopyrrolopyrrole molecules.

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