scholarly journals The impact of molecular weight, air exposure and molecular doping on the charge transport properties and electronic defects in dithienyl-diketopyrrolopyrrole-thieno[3,2-b]thiophene copolymers

2016 ◽  
Vol 4 (46) ◽  
pp. 10827-10838 ◽  
Author(s):  
Riccardo Di Pietro ◽  
Tim Erdmann ◽  
Naixiang Wang ◽  
Xuhai Liu ◽  
David Gräfe ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Charge Transport ◽  
Transport Properties ◽  
Hole Transport ◽  
Trap States ◽  
Air Exposure ◽  
Molecular Doping ◽  
Electronic Defects ◽  
The Impact

Optimization of hole transport via passivation of trap states.

Elucidating the impact of molecular weight on morphology, charge transport, photophysics and performance of all-polymer solar cells

2020 ◽  
Vol 8 (40) ◽  
pp. 21070-21083 ◽  
Author(s):  
Duyen K. Tran ◽  
Amélie Robitaille ◽  
I. Jo Hai ◽  
Xiaomei Ding ◽  
Daiki Kuzuhara ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Solar Cells ◽  
Charge Transport ◽  
Polymer Solar Cells ◽  
Polymer Molecular Weight ◽  
Photovoltaic Properties ◽  
Blend Morphology ◽  
And Performance ◽  
The Impact

This work provides a unified understanding on how polymer molecular weight influences the blend photophysics, blend morphology, charge transport, and photovoltaic properties of all-polymer solar cells.

The impact of molecular weight on microstructure and charge transport in semicrystalline polymer semiconductors–poly(3-hexylthiophene), a model study

2013 ◽  
Vol 38 (12) ◽  
pp. 1978-1989 ◽  
Author(s):  
Felix Peter Vinzenz Koch ◽  
Jonathan Rivnay ◽  
Sam Foster ◽  
Christian Müller ◽  
Jonathan M. Downing ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Charge Transport ◽  
Semicrystalline Polymer ◽  
Polymer Semiconductors ◽  
Model Study ◽  
The Impact

scholarly journals On the Impact of Linear Siloxanated Side Chains on the Molecular Self‐Assembling and Charge Transport Properties of Conjugated Polymers

2020 ◽  
pp. 2007734
Author(s):  
Narayanaswamy Kamatham ◽  
Olzhas A. Ibraikulov ◽  
Pablo Durand ◽  
Jing Wang ◽  
Olivier Boyron ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Charge Transport ◽  
Transport Properties ◽  
Side Chains ◽  
Self Assembling ◽  
The Impact

scholarly journals Effects of Applied Voltages on the Charge Transport Properties in a ZnO Nanowire Field Effect Transistor

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 268 ◽  
Author(s):  
Jongwon Yoon ◽  
Fu Huang ◽  
Ki Hoon Shin ◽  
Jung Inn Sohn ◽  
Woong-Ki Hong
Keyword(s):  
Charge Transport ◽  
Transport Properties ◽  
Temperature Regime ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Building Blocks ◽  
Trap States ◽  
Zno Nanowire ◽  
Threshold Voltage Shift ◽  
Effect Transistor

We investigate the effect of applied gate and drain voltages on the charge transport properties in a zinc oxide (ZnO) nanowire field effect transistor (FET) through temperature- and voltage-dependent measurements. Since the FET based on nanowires is one of the fundamental building blocks in potential nanoelectronic applications, it is important to understand the transport properties relevant to the variation in electrically applied parameters for devices based on nanowires with a large surface-to-volume ratio. In this work, the threshold voltage shift due to a drain-induced barrier-lowering (DIBL) effect was observed using a Y-function method. From temperature-dependent current-voltage (I-V) analyses of the fabricated ZnO nanowire FET, it is found that space charge-limited conduction (SCLC) mechanism is dominant at low temperatures and low voltages; in particular, variable-range hopping dominates the conduction in the temperature regime from 4 to 100 K, whereas in the high-temperature regime (150–300 K), the thermal activation transport is dominant, diminishing the SCLC effect. These results are discussed and explained in terms of the exponential distribution and applied voltage-induced variation in the charge trap states at the band edge.

scholarly journals Enhancement of air-stability, π-stacking ability, and charge transport properties of fluoroalkyl side chain engineered n-type naphthalene tetracarboxylic diimide compounds

RSC Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 57-70
Author(s):  
Gautomi Gogoi ◽  
Labanya Bhattacharya ◽  
Smruti R. Sahoo ◽  
Sridhar Sahu ◽  
Neelotpal Sen Sarma ◽  
...  
Keyword(s):  
Charge Transport ◽  
Transport Properties ◽  
Side Chain ◽  
Π Stacking ◽  
Naphthalene Tetracarboxylic Diimide ◽  
The Impact ◽  
Acceptor Moiety

In this study, the impact of fluoroalkyl side chain substitution on the air-stability, π-stacking ability, and charge transport properties of the versatile acceptor moiety naphthalene tetracarboxylic diimide (NDI) has been explored.

scholarly journals Exploration of optoelectronic, nonlinear and charge transport properties of hydroquinoline derivatives by DFT approach

2020 ◽  
Vol 38 (2) ◽  
pp. 284-295
Author(s):  
Ahmad Irfan ◽  
Abdullah G. Al-Sehemi ◽  
Aijaz Rasool Chaudhry ◽  
Shabbir Muhammad ◽  
Ruifa Jin
Keyword(s):  
Charge Transport ◽  
Transport Properties ◽  
Density Functional ◽  
Reorganization Energy ◽  
Hole Transport ◽  
Partial Density ◽  
Geometrical Parameters ◽  
Reactivity Descriptors ◽  
Major Transitions ◽  
Experimental Crystal

AbstractPresent investigation deals with an in depth study of three compounds including 4-(4-chlorophenyl)-8-methyl-2-oxo- 1,2,5,6,7,8-hexahydroquinoline-3-carbonitrile (1), 4-(4-bromophenyl)-8-methyl-2-oxo-1,2,3,4,4a,5,6,7-octahydroquinoline-3- carbonitrile (2) and 8-methyl-2-oxo-4-(thiophen-2-yl)-1,2,5,6,7,8-hexahydroquinoline-3-carbonitrile (3) with respect to their structural, electronic, optical and charge transport properties. The ground and excited states geometries were optimized by density functional theory (DFT) and time dependent DFT, respectively. To rationalize the adopted methodology, the calculated geometrical parameters at ground state were compared with the experimental crystal structures. Several quantum chemical insights including the analysis of frontier molecular orbitals (FMOs), total/partial density of states (T/PDOS), molecular electrostatic potentials (MEP), local and global reactivity descriptors revealed that the studied compounds would be efficient multifunctional materials. The absorption wavelengths as well as their major transitions were thoroughly studied at TD-B3LYP/6-31G** level of theory. The smaller hole reorganization energies indicate that all these compounds might show better hole transport tendency. The anionic geometry relaxation of compound 2 is larger than the cationic form which leads to higher electron reorganization energy revealing the reduction of electron charge transport as compared to the hole.

Electron and hole transport in solution-processed fullerenes

2021 ◽  
Author(s):  
Gert-Jan A. H. Wetzelaer ◽  
Paul W. M. Blom
Keyword(s):  
Solar Cells ◽  
Methyl Ester ◽  
Charge Transport ◽  
Transport Properties ◽  
Bulk Heterojunction ◽  
Acid Methyl Ester ◽  
Hole Transport ◽  
Heterojunction Solar Cells ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester

Methanofullerene [6,6]-phenyl C61-butyric acid methyl ester and its derivatives have been the workhorse acceptors in organic bulk heterojunction solar cells for more than two decades. Here, an overview of their charge transport properties is given.

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