scholarly journals Computational Study of P3HT/C60-Fullerene Miscibility

2014 ◽  
Vol 67 (4) ◽  
pp. 585 ◽  
Author(s):  
David M. Huang
Keyword(s):  
Conjugated Polymer ◽  
Force Fields ◽  
Computational Study ◽  
Organic Photovoltaic ◽  
C60 Fullerene ◽  
Processing Conditions ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Dynamics Simulations ◽  
Blend Ratios

Classical molecular dynamics simulations and statistical thermodynamics are used to investigate the miscibility of blends of the conjugated polymer poly(3-hexylthiophene) (P3HT) and fullerene C60 for blend ratios typically used in organic photovoltaic devices over a range of temperatures. Depending on which of two slightly different simulation force fields is used, the calculations suggest that amorphous P3HT/fullerene blends are either miscible or immisicble under typical processing conditions. The former result is consistent with recent experiments and suggests that experimentally observed nano-scale phase separation is driven by polymer or fullerene crystallisation. But the inconsistency between the different force fields indicates that these blends are close to phase coexistence between the separated and homogeneously mixed phases and suggests that care must be taken in interpreting simulation data on P3HT/fullerene blends. These findings have implications for organic photovoltaics, in which the microstructure of conjugated-polymer/fullerene blends plays a crucial role in device performance.

Multiple Charge Separation Pathways in New-Generation Non-Fullerene Acceptors: a Computational Study

2021 ◽  
Author(s):  
Alessandro Landi ◽  
Daniele Padula
Keyword(s):  
Charge Separation ◽  
Computational Study ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
New Generation ◽  
Multiple Charge

Non-fullerene acceptors led to outstanding improvements in the efficiency of organic photovoltaic devices, with high promises of further advancements. Several studies have been performed to rationalise their exceptional performances, with...

Enhanced Performance from Acid Functionalised Multiwall Carbon Nanotubes in the Active Layer of Organic Bulk Heterojunction Solar Cells

2010 ◽  
Vol 1270 ◽  
Author(s):  
Nasrul Aamina Nismy ◽  
A.A. Damitha T Adikaari ◽  
Ravi Silva
Keyword(s):  
Carbon Nanotubes ◽  
Active Layer ◽  
Conjugated Polymer ◽  
Bulk Heterojunction ◽  
Multiwall Carbon Nanotubes ◽  
Organic Photovoltaic ◽  
Fullerene Derivative ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Multiwall Carbon

AbstractSolution-processable organic bulk-heterojunction photovoltaic devices have made great advances over the past decade. The concept, ultrafast photo induced electron transfer from a conjugated polymer to fullerene derivative molecules in bulk-heterojunction systems, leads to device efficiencies as high as 6%. Light absorption, charge separation and charge transport to electrodes are the most important steps in organic photovoltaic devices. The enhanced light absorption through thicker active layers results in more exciton creation, however, leads to increased recombination due to the relatively short exciton diffusion length. We fabricated poly(3-hexylthiophene)/ [6,6]-phenyl C61 butyric acid methyl ester bulk-heterojunction devices with multiwall carbon nanotubes in the active layer in a bid to address this deficiency. Functionalization of carbon nanotubes allows better dispersion in aromatic solvents, 1,2-dichlorobenzene in this study, and pristine multiwall nanotubes result in poorer dispersions. Organic photovoltaic devices fabricated with pristine multiwall carbon nanotubes in the active layer result in power conversion efficiencies ˜1.4%, which show localized nanotube-rich areas in the active layer. Alternatively, acid functionalized nanotubes in the active layer results in efficiencies as high as 2.2 % with no distinct nanotube-rich sectors. The open circuit voltages of the devices show a dependency on the loading of nanotubes in the active layer. Further, the shunt resistances of the devices with carbon nanotubes decrease, which needs careful selection of the tubes depending on active layer thickness. This work compares the device performances in detail and identifies further improvements to conjugated polymer/fullerene derivative/multiwall carbon nanotubes hybrid photovoltaic systems.

scholarly journals Organic photovoltaic devices produced from conjugated polymer / methanofullerene bulk heterojunctions

2001 ◽  
Vol 121 (1-3) ◽  
pp. 1517-1520 ◽  
Author(s):  
C.J. Brabec ◽  
S.E. Shaheen ◽  
T. Fromherz ◽  
F. Padinger ◽  
J.C. Hummelen ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Bulk Heterojunctions

scholarly journals Layer-by-layer fabrication of organic photovoltaic devices: material selection and processing conditions

2021 ◽  
Vol 9 (1) ◽  
pp. 14-40
Author(s):  
Marie D. M. Faure ◽  
Benoît H. Lessard
Keyword(s):  
Material Selection ◽  
Organic Photovoltaic ◽  
Layer By Layer ◽  
Processing Conditions ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Sequential Deposition ◽  
Active Layers ◽  
Promising Strategy

Layer-by-layer (LbL) processing, otherwise known as sequential deposition, is emerging as the most promising strategy for fabrication of active layers in organic photovoltaic (OPV) devices on both laboratory and industrial scales.

Progress in Upscaling Organic Photovoltaic Devices

2021 ◽  
pp. 2100342
Author(s):  
Gabriel Bernardo ◽  
Tânia Lopes ◽  
David G. Lidzey ◽  
Adélio Mendes
Keyword(s):  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices
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