Synthesis of Main-Chain Metallo-Copolymers Containing Donor and Acceptor Bis-Terpyridyl Ligands for Photovoltaic Applications

2012 ◽  
Vol 33 (6-7) ◽  
pp. 528-533 ◽  
Author(s):  
Harihara Padhy ◽  
Mohan Ramesh ◽  
Dhananjaya Patra ◽  
Rudrakanta Satapathy ◽  
Murali Krishna Pola ◽  
...  
Keyword(s):  
Main Chain ◽  
Donor And Acceptor ◽  
Photovoltaic Applications

Conjugated alternating copolymers containing both donor and acceptor moieties in the main chain

2007 ◽  
pp. 1704-1706 ◽  
Author(s):  
Ming Zhang ◽  
Changduk Yang ◽  
Ashok K. Mishra ◽  
Wojciech Pisula ◽  
Gang Zhou ◽  
...  
Keyword(s):  
Main Chain ◽  
Alternating Copolymers ◽  
Donor And Acceptor

Photophysics and Applications in Plastic Solar Cells of Conjugated Polymer/Fullerene Composites

2003 ◽  
Vol 11 (8) ◽  
pp. 679-689 ◽  
Author(s):  
Hongzhen Lin ◽  
Hongmin Huang ◽  
Qingguo He ◽  
Fenglian Bai
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Conjugated Polymer ◽  
Energy Conversion Efficiency ◽  
Dilute Solution ◽  
Donor And Acceptor ◽  
Photovoltaic Applications ◽  
Photoinduced Charge Separation ◽  
Plastic Solar Cells ◽  
Photoinduced Charge

The photovoltaic applications of conjugated polymer/fullerene composites have attracted much attention from the scientific community. The photoinduced electron transfer and other related photophysical processes occurred in the composites are the central issues. Several kinds of conjugated polymers have been synthesized in our laboratory. Studies of their composites with fullerene are reviewed. We observed strong fluorescence quenching of these conjugated polymers on mixing them with C60 in dilute solution. Anion radical species of C60 were observed in ESR measurements as a result of photoinduced charge separation. The quenching constants vary with different conjugated polymers and thus provide a quantum measurement for the interaction between the donor and acceptor. Solar cells have been fabricated from these conjugated polymer/fullerene composites. Energy conversion efficiency up to 1.1% has been achieved.

Self-assembled bulk heterojunctions from integral molecules with nonconjugately linked donor and acceptor units for photovoltaic applications

2020 ◽  
Vol 4 (7) ◽  
pp. 3190-3210
Author(s):  
Hao Liu ◽  
Huaizhi Gao ◽  
Jun Lin ◽  
Tasawar Hayat ◽  
Ahmed Alsaedi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Bulk Heterojunctions ◽  
Heterojunction Structure ◽  
Highly Efficient ◽  
Donor And Acceptor ◽  
Photovoltaic Applications ◽  
Donor Acceptor ◽  
Self Assembled

Donor–acceptor integral molecules with donor and acceptor units interlinked by nonconjugated flexible linking units can self-assemble into an ideal bulk heterojunction structure for application in highly efficient polymer solar cells are reviewed.

scholarly journals Energy transfer processes along a supramolecular chain of π-conjugated molecules

2012 ◽  
Vol 370 (1972) ◽  
pp. 3787-3801 ◽  
Author(s):  
S. A. Schmid ◽  
R. Abbel ◽  
A. P. H. J. Schenning ◽  
E. W. Meijer ◽  
L. M. Herz
Keyword(s):  
Wave Function ◽  
Energy Transfer ◽  
Main Chain ◽  
Polymer Chains ◽  
Linear Polymer ◽  
Exciton Migration ◽  
Energy Donor ◽  
Donor And Acceptor ◽  
Initial Excitation ◽  
Quadruple Hydrogen Bonding

We have investigated the energy transfer dynamics in a supramolecular linear polymer chain comprising oligofluorene (OF) energy donor units linked by quadruple hydrogen-bonding groups, and oligophenylene (OPV) chain ends that act as energy acceptors. Using femtosecond spectroscopy, we followed the dynamics of energy transfer from the main chain of OF units to the OPV chain ends and simulated these data taking a Monte Carlo approach that included different extents of electronic wave function delocalization for the energy donor and acceptor. Best correlations between experimental and theoretical results were obtained for the assumption of electronic coupling occurring between a localized donor dipole moment and a delocalized acceptor moment. These findings emphasize that geometric relaxation following initial excitation of the donor needs to be taken into account, as it leads to a localization of the donor's excited state wave function prior to energy transfer. In addition, our simulations show that the energy transfer from the main chain to the ends is dominated by an interplay between slow and spatially limited exciton migration along the OF segments comprising the main chain and the comparatively faster hetero-transfer to the end-cap acceptors from directly adjoining OF segments. These results clearly support the description of host–guest energy transfer in linear polymer chains as a two-step mechanism with exciton diffusion in the host being a prerequisite to energy transfer to the guest.

Funnel shaped molecules containing benzo/pyrido[1,2,5]thiadiazole functionalities as peripheral acceptors for organic photovoltaic applications

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 66978-66989 ◽  
Author(s):  
Mahalingavelar Paramasivam ◽  
Akhil Gupta ◽  
N. Jagadeesh Babu ◽  
K. Bhanuprakash ◽  
Sheshanath V. Bhosale ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Energy Levels ◽  
Organic Photovoltaic ◽  
Donor And Acceptor ◽  
Photovoltaic Applications

Energy levels of a funnel shaped molecule was effected by varying donor and acceptor combinations and a power efficiency of 2.21% achieved for DCTP molecule.

Formation of high temperature phase in flash-evaporated SnSe films

1990 ◽  
Vol 48 (4) ◽  
pp. 698-699
Author(s):  
J.P.S. Hanjra
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Energy Gap ◽  
Dominant Role ◽  
Fine Powder ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Water Mixture ◽  
Flash Evaporation ◽  
Photovoltaic Applications

Tin mono selenide (SnSe) with an energy gap of about 1 eV is a potential material for photovoltaic applications. Various authors have studied the structure, electronic and photoelectronic properties of thin films of SnSe grown by various deposition techniques. However, for practical photovoltaic junctions the electrical properties of SnSe films need improvement. We have carried out investigations into the properties of flash evaporated SnSe films. In this paper we report our results on the structure, which plays a dominant role on the electrical properties of thin films by TEM, SEM, and electron diffraction (ED).Thin films of SnSe were deposited by flash evaporation of SnSe fine powder prepared from high purity Sn and Se, onto glass, mica and KCl substrates in a vacuum of 2Ø micro Torr. A 15% HF + 2Ø% HNO3 solution was used to detach SnSe film from the glass and mica substrates whereas the film deposited on KCl substrate was floated over an ethanol water mixture by dissolution of KCl. The floating films were picked up on the grids for their EM analysis.

Stoichiometric Determination of Graphite Intercalation Compounds Using Rutherford Backscatiering Spectrometry

1983 ◽  
Vol 27 ◽  
Author(s):  
L. Salamanca-Riba ◽  
B.S. Elman ◽  
M.S. Dresselhaus ◽  
T. Venkatesan
Keyword(s):  
Experimental Error ◽  
Rutherford Backscattering Spectrometry ◽  
Rutherford Backscattering ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
X Ray ◽  
Donor And Acceptor ◽  
Graphite Intercalation ◽  
Non Destructive

ABSTRACTRutherford backscattering spectrometry (RBS) is used to characterize the stoichiometry of graphite intercalation compounds (GIC). Specific application is made to several stages of different donor and acceptor compounds and to commensurate and incommensurate intercalants. A deviation from the theoretical stoichiometry is measured for most of the compounds using this non-destructive method. Within experimental error, the RBS results agree with those obtained from analysis of the (00ℓ) x-ray diffractograms and weight uptake measurements on the same samples.

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