Molecular geometry fluctuations and field-dependent mobility in conjugated polymers

2001 ◽  
Vol 63 (8) ◽  
Author(s):  
Z. G. Yu ◽  
D. L. Smith ◽  
A. Saxena ◽  
R. L. Martin ◽  
A. R. Bishop
Keyword(s):  
Conjugated Polymers ◽  
Molecular Geometry ◽  
Field Dependent

Molecular Geometry Fluctuation Model for the Mobility of Conjugated Polymers

2000 ◽  
Vol 84 (4) ◽  
pp. 721-724 ◽  
Author(s):  
Z. G. Yu ◽  
D. L. Smith ◽  
A. Saxena ◽  
R. L. Martin ◽  
A. R. Bishop
Keyword(s):  
Conjugated Polymers ◽  
Molecular Geometry ◽  
Fluctuation Model

Effects of pyridyl group orientations on the optoelectronic properties of regio-isomeric diketopyrrolopyrrole based π-conjugated polymers

2016 ◽  
Vol 4 (13) ◽  
pp. 2470-2479 ◽  
Author(s):  
Jing Yue ◽  
Sheng Sun ◽  
Junfei Liang ◽  
Wenkai Zhong ◽  
Linfeng Lan ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Charge Transport ◽  
Transport Properties ◽  
Molecular Geometry ◽  
Optoelectronic Properties ◽  
Pyridyl Group

The orientation of the N-atom in the pyridyl groups shows pronounced effects on the molecular geometry and charge transport properties.

Modulation of the molecular geometry of carbazolebis(thiadiazole)-based conjugated polymers for photovoltaic applications

2013 ◽  
Vol 4 (8) ◽  
pp. 2480 ◽  
Author(s):  
Daijun Zha ◽  
Lie Chen ◽  
Feiyan Wu ◽  
Hongming Wang ◽  
Yiwang Chen
Keyword(s):  
Conjugated Polymers ◽  
Molecular Geometry ◽  
Photovoltaic Applications

scholarly journals Elevated Photovoltaic Performance in Medium Bandgap Copolymers Composed of Indacenodi-thieno[3,2-b]thiophene and Benzothiadiazole Subunits by Modulating the π-Bridge

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 368 ◽  
Author(s):  
Lili An ◽  
Junfeng Tong ◽  
Yubo Huang ◽  
Zezhou Liang ◽  
Jianfeng Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Photovoltaic Performance ◽  
Molecular Geometry ◽  
Orbital Energy ◽  
Polymer Backbone ◽  
Photoactive Layer ◽  
Enhanced Absorption ◽  
Highest Occupied Molecular Orbital ◽  
The Impact ◽  
Orbital Energy Level

Two random conjugated polymers (CPs), namely, PIDTT-TBT and PIDTT-TFBT, in which indacenodithieno[3,2-b]thiophene (IDTT), 3-octylthiophene, and benzothiadiazole (BT) were in turn utilized as electron-donor (D), π-bridge, and electron-acceptor (A) units, were synthesized to comprehensively analyze the impact of reducing thiophene π-bridge and further fluorination on photostability and photovoltaic performance. Meanwhile, the control polymer PIDTT-DTBT with alternating structure was also prepared for comparison. The broadened and enhanced absorption, down-shifted highest occupied molecular orbital energy level (EHOMO), more planar molecular geometry thus enhanced the aggregation in the film state, but insignificant impact on aggregation in solution and photostability were found after both reducing thiophene π-bridge in PIDTT-TBT and further fluorination in PIDTT-TFBT. Consequently, PIDTT-TBT-based device showed 185% increased PCE of 5.84% profited by synergistically elevated VOC, JSC, and FF than those of its counterpart PIDTT-DTBT, and this improvement was chiefly ascribed to the improved absorption, deepened EHOMO, raised μh and more balanced μh/μe, and optimized morphology of photoactive layer. However, the dropped PCE was observed after further fluorination in PIDTT-TFBT, which was mainly restricted by undesired morphology for photoactive layer as a result of strong aggregation even if in the condition of the upshifted VOC. Our preliminary results can demonstrate that modulating the π-bridge in polymer backbone was an effective method with the aim to enhance the performance for solar cell.

Electronic structure studies of conducting polymers by electron energy-loss spectroscopy

1996 ◽  
Vol 54 ◽  
pp. 160-161
Author(s):  
J. Fink
Keyword(s):  
Electronic Structure ◽  
Conducting Polymers ◽  
Conjugated Polymers ◽  
Electron Acceptors ◽  
Electron Donors ◽  
Light Emitting ◽  
One Dimensional ◽  
New Class ◽  
Electrical Conductivities ◽  
Electron Energy Loss

Conducting polymers comprises a new class of materials achieving electrical conductivities which rival those of the best metals. The parent compounds (conjugated polymers) are quasi-one-dimensional semiconductors. These polymers can be doped by electron acceptors or electron donors. The prototype of these materials is polyacetylene (PA). There are various other conjugated polymers such as polyparaphenylene, polyphenylenevinylene, polypoyrrole or polythiophene. The doped systems, i.e. the conducting polymers, have intersting potential technological applications such as replacement of conventional metals in electronic shielding and antistatic equipment, rechargable batteries, and flexible light emitting diodes.Although these systems have been investigated almost 20 years, the electronic structure of the doped metallic systems is not clear and even the reason for the gap in undoped semiconducting systems is under discussion.

MAGNETIC FIELD DEPENDENT RESTSTRAHLEN SPECTRA IN PARAMAGNETIC CeF3

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-499-C6-501 ◽  
Author(s):  
H. Gerlinger ◽  
G. Schaack
Keyword(s):  
Magnetic Field ◽  
Field Dependent

MAGNETIC FIELD DEPENDENT RELAXATION TIME IN p-InSb AT LOW TEMPERATURES

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-689-C5-693
Author(s):  
J. D.N. Cheeke ◽  
G. Madore ◽  
A. Hikata
Keyword(s):  
Magnetic Field ◽  
Relaxation Time ◽  
Low Temperatures ◽  
Field Dependent

Theoretical study of intramolecular hydrogen bonding and molecular geometry of 2-trifluoromethylphenol

10.1002/jcc.2 ◽  
1996 ◽  
Vol 17 (16) ◽  
pp. 1804-1819 ◽  
Author(s):  
Attila Kov�cs ◽  
Istv�n Kolossv�ry ◽  
G�bor I. Csonka ◽  
Istv�n Hargittai
Keyword(s):  
Hydrogen Bonding ◽  
Theoretical Study ◽  
Molecular Geometry ◽  
Intramolecular Hydrogen Bonding ◽  
Intramolecular Hydrogen
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