Organic Co-crystal Semiconductors. A Crystal Engineering Perspective

CrystEngComm ◽  
2021 ◽  
Author(s):  
Aijaz A. A. Dar ◽  
Shahida Rashid
Keyword(s):  
Organic Semiconductors ◽  
Flexible Electronics ◽  
Crystal Engineering ◽  
Organic Metal ◽  
Inorganic Semiconductors

Organic semiconductors are being perceived as promising materials, which will complement or even substitute inorganic semiconductors, for the development of futuristic versatile flexible electronics. The discovery of organic metal TTF-TCNQ...

Growth direction dependent separate-channel charge transport in organic weak charge-transfer co-crystal of anthracene-DTTCNQ

2022 ◽  
Author(s):  
Hui Jiang ◽  
Jun Ye ◽  
Peng Hu ◽  
Shengli Zhu ◽  
Yanqin Liang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Transport ◽  
Electronic Properties ◽  
Single Crystals ◽  
Organic Semiconductors ◽  
Crystal Engineering ◽  
Molecular Crystal ◽  
Growth Direction ◽  
Weak Charge ◽  
Separate Channel

Co-crystallization is an efficient way of molecular crystal engineering to tune the electronic properties of organic semiconductors. In this work, we synthesized anthracene-4,8-bis(dicyanomethylene)4,8-dihydrobenzo[1,2-b:4,5-b’]-dithiophene (DTTCNQ) single crystals as a template to...

scholarly journals Mesomorphic Behavior in Silver(I) N-(4-Pyridyl) Benzamide with Aromatic π–π Stacking Counterions

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1666 ◽  
Author(s):  
Issac Torres ◽  
Mauro Ruiz ◽  
Hung Phan ◽  
Noemi Dominguez ◽  
Jacobo Garcia ◽  
...  
Keyword(s):  
Solid State ◽  
Organic Semiconductors ◽  
Flexible Electronics ◽  
Crystalline Solid ◽  
Naval Research ◽  
Scanning Calorimetry ◽  
New Family ◽  
Π Stacking ◽  
Capable Groups ◽  
New Generation

Organic semiconductor materials composed of π–π stacking aromatic compounds have been under intense investigation for their potential uses in flexible electronics and other advanced technologies. Herein we report a new family of seven π–π stacking compounds of silver(I) bis-N-(4-pyridyl) benzamide with varying counterions, namely [Ag(NPBA)2]X, where NPBA is N-(4-pyridyl) benzamine, X = NO3− (1), ClO4− (2), CF3SO3− (3), PF6− (4), BF4− (5), CH3PhSO3− (6), and PhSO3− (7), which form extended π−π stacking networks in one-dimensional (1D), 2D and 3D directions in the crystalline solid-state via the phenyl moiety, with average inter-ring distances of 3.823 Å. Interestingly, the counterions that contain π–π stacking-capable groups, such as in 6 and 7, can induce the formation of mesomorphic phases at 130 °C in dimethylformamide (DMF), and can generate highly branched networks at the mesoscale. Atomic force microscopy studies showed that 2D interconnected fibers form right after nucleation, and they extend from ~30 nm in diameter grow to reach the micron scale, which suggests that it may be possible to stop the process in order to obtain nanofibers. Differential scanning calorimetry studies showed no remarkable thermal behavior in the complexes in the solid state, which suggests that the mesomorphic phases originate from the mechanisms that occur in the DMF solution at high temperatures. An all-electron level simulation of the band gaps using NRLMOL (Naval Research Laboratory Molecular Research Library) on the crystals gave 3.25 eV for (1), 3.68 eV for (2), 1.48 eV for (3), 5.08 eV for (4), 1.53 eV for (5), and 3.55 eV for (6). Mesomorphic behavior in materials containing π–π stacking aromatic interactions that also exhibit low-band gap properties may pave the way to a new generation of highly branched organic semiconductors.

Crystal Engineering Organic Semiconductors

2011 ◽  
pp. 1-19 ◽  
Author(s):  
Joseph C. Sumrak ◽  
Anatoliy N. Sokolov ◽  
Leonard R. Macgillivray
Keyword(s):  
Organic Semiconductors ◽  
Crystal Engineering

A novel structure of grid spirofluorene: a new organic semiconductor with low reorganization energy

2019 ◽  
Vol 43 (20) ◽  
pp. 7790-7796 ◽  
Author(s):  
Lei Yang ◽  
Jie Mao ◽  
Cheng-Zhu Yin ◽  
Mohamad Akbar Ali ◽  
Xiang-Ping Wu ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Reorganization Energy ◽  
Charge Mobility ◽  
Inorganic Semiconductors ◽  
Novel Structure ◽  
Lower Charge

The lower charge mobility of organic semiconductors relative to that of inorganic semiconductors is a thorny problem that still has not been resolved.

Crystal Engineering of Biphenylene-Containing Acenes for High-Mobility Organic Semiconductors

2019 ◽  
Vol 141 (8) ◽  
pp. 3589-3596 ◽  
Author(s):  
Jinlian Wang ◽  
Ming Chu ◽  
Jian-Xun Fan ◽  
Tsz-Ki Lau ◽  
Ai-Min Ren ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Crystal Engineering ◽  
High Mobility

scholarly journals Covalent organic frameworks with high quantum efficiency in photocatalytic hydrogen evolution: mediating charge separation

2021 ◽  
Author(s):  
Chunzhi Li ◽  
Jiali Liu ◽  
He Li ◽  
Kaifeng Wu ◽  
Junhui Wang ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Quantum Efficiency ◽  
Organic Semiconductors ◽  
Transient Absorption ◽  
Active Species ◽  
Binding Energies ◽  
Transient Absorption Spectroscopy ◽  
High Quantum Efficiency ◽  
Inorganic Semiconductors ◽  
Femtosecond Transient Absorption

Abstract Compared with inorganic semiconductors, the difficulty of exciton dissociation is one of the main reasons for the lower photocatalytic activity of organic semiconductors. In this work, we report that the charge carrier lifetime is dramatically prolonged by incorporating a suitable donor-acceptor (β-ketene-CN) pair to a covalent organic framework nanosheet (CN-CON). CN-CON showed remarkably high apparent quantum efficiency up to 82.6% at 450 nm in photocatalytic H2 evolution, superior to all the COFs reported so far. The charge carrier kinetic analysis and femtosecond transient absorption spectroscopy characterizations verified that CN-CON had intrinsically lower exciton binding energies and hence longer-lived charge carriers than the corresponding CON without CN unit. This work provides an excellent model for gaining insight into the nature of ultrashort-lived active species in polymeric organic photocatalysts.

scholarly journals Recent Trends and Developments in Conducting Polymer Nanocomposites for Multifunctional Applications

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2898
Author(s):  
Shubham Sharma ◽  
P. Sudhakara ◽  
Abdoulhdi A. Borhana Omran ◽  
Jujhar Singh ◽  
R. A. Ilyas
Keyword(s):  
Solar Cells ◽  
Fuel Cells ◽  
Electrical Properties ◽  
Conducting Polymers ◽  
Shape Memory ◽  
Polymer Nanocomposites ◽  
Conducting Polymer ◽  
Flexible Electronics ◽  
Inorganic Semiconductors ◽  
Electrically Conducting

Electrically-conducting polymers (CPs) were first developed as a revolutionary class of organic compounds that possess optical and electrical properties comparable to that of metals as well as inorganic semiconductors and display the commendable properties correlated with traditional polymers, like the ease of manufacture along with resilience in processing. Polymer nanocomposites are designed and manufactured to ensure excellent promising properties for anti-static (electrically conducting), anti-corrosion, actuators, sensors, shape memory alloys, biomedical, flexible electronics, solar cells, fuel cells, supercapacitors, LEDs, and adhesive applications with desired-appealing and cost-effective, functional surface coatings. The distinctive properties of nanocomposite materials involve significantly improved mechanical characteristics, barrier-properties, weight-reduction, and increased, long-lasting performance in terms of heat, wear, and scratch-resistant. Constraint in availability of power due to continuous depletion in the reservoirs of fossil fuels has affected the performance and functioning of electronic and energy storage appliances. For such reasons, efforts to modify the performance of such appliances are under way through blending design engineering with organic electronics. Unlike conventional inorganic semiconductors, organic electronic materials are developed from conducting polymers (CPs), dyes and charge transfer complexes. However, the conductive polymers are perhaps more bio-compatible rather than conventional metals or semi-conductive materials. Such characteristics make it more fascinating for bio-engineering investigators to conduct research on polymers possessing antistatic properties for various applications. An extensive overview of different techniques of synthesis and the applications of polymer bio-nanocomposites in various fields of sensors, actuators, shape memory polymers, flexible electronics, optical limiting, electrical properties (batteries, solar cells, fuel cells, supercapacitors, LEDs), corrosion-protection and biomedical application are well-summarized from the findings all across the world in more than 150 references, exclusively from the past four years. This paper also presents recent advancements in composites of rare-earth oxides based on conducting polymer composites. Across a variety of biological and medical applications, the fact that numerous tissues were receptive to electric fields and stimuli made CPs more enticing.

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