THE DIPOLE TRAPS OF THE CHARGE CARRIERS IN IMPURITY ORGANIC SEMICONDUCTORS

1990 ◽  
pp. 1701-1704
Author(s):  
Nina OSTAPENKO ◽  
Vladimir SUGAKOV
Keyword(s):  
Organic Semiconductors ◽  
Charge Carriers

scholarly journals Molecular Doping in Multi-Molecule Polymer-Dopant Complexes Shows Reduced Coulomb Binding

2020 ◽  
Author(s):  
Chuanding Dong ◽  
Stefan Schumacher
Keyword(s):  
Charge Transfer ◽  
Organic Semiconductors ◽  
Positive Charge ◽  
Charge Carriers ◽  
Mechanistic Study ◽  
Charge Transfer Complexes ◽  
Mobile Charge ◽  
Molecular Doping ◽  
Gap States ◽  
P Type

<p>The mechanistic study of molecular doping of organic semiconductors (OSC) requires</p><p>an improved understanding of the role and formation of integer charge transfer complexes</p><p>(ICTC) on a microscopic level. In the present work we go one crucial step beyond</p><p>the simplest scenario of an isolated bi-molecular ICTC and study ICTCs formed of</p><p>up to two (poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b,3,4-b”]dithiophene)-alt-4,7-(2,1,3-</p><p>benzothiadiazole)](PCPDT-BT) oligomers and up to two CN6-CP molecules. We find that depending</p><p>on geometric arrangement, complexes containing two conjugated oligomers and two</p><p>dopant molecules can show p-type doping with double integer charge transfer, resulting in either</p><p>two singly doped oligomers or one doubly doped oligomer. Interestingly, compared to an individual</p><p>oligomer-dopant complex, the resulting in-gap states on the doped oligomers are significantly</p><p>lowered in energy. Indicating that, already in the relatively small systems studied here, Coulomb</p><p>binding of the doping-induced positive charge to the counter-ion is reduced which is an elemental</p><p>step towards generating mobile charge carriers through molecular doping.</p>

scholarly journals Molecular Doping in Multi-Molecule Polymer-Dopant Complexes Shows Reduced Coulomb Binding

2020 ◽  
Author(s):  
Chuanding Dong ◽  
Stefan Schumacher
Keyword(s):  
Charge Transfer ◽  
Organic Semiconductors ◽  
Positive Charge ◽  
Charge Carriers ◽  
Mechanistic Study ◽  
Charge Transfer Complexes ◽  
Mobile Charge ◽  
Molecular Doping ◽  
Gap States ◽  
P Type

<p>The mechanistic study of molecular doping of organic semiconductors (OSC) requires</p><p>an improved understanding of the role and formation of integer charge transfer complexes</p><p>(ICTC) on a microscopic level. In the present work we go one crucial step beyond</p><p>the simplest scenario of an isolated bi-molecular ICTC and study ICTCs formed of</p><p>up to two (poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b,3,4-b”]dithiophene)-alt-4,7-(2,1,3-</p><p>benzothiadiazole)](PCPDT-BT) oligomers and up to two CN6-CP molecules. We find that depending</p><p>on geometric arrangement, complexes containing two conjugated oligomers and two</p><p>dopant molecules can show p-type doping with double integer charge transfer, resulting in either</p><p>two singly doped oligomers or one doubly doped oligomer. Interestingly, compared to an individual</p><p>oligomer-dopant complex, the resulting in-gap states on the doped oligomers are significantly</p><p>lowered in energy. Indicating that, already in the relatively small systems studied here, Coulomb</p><p>binding of the doping-induced positive charge to the counter-ion is reduced which is an elemental</p><p>step towards generating mobile charge carriers through molecular doping.</p>

Ultrafast photogeneration and band-like transport of mobile charge carriers in organic semiconductors

2005 ◽  
Author(s):  
O. Ostroverkhova ◽  
D. G. Cooke ◽  
S. Shcherbyna ◽  
R. F. Egerton ◽  
F. A. Hegmann ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Charge Carriers ◽  
Mobile Charge

Concentration dependence of the transport energy level for charge carriers in organic semiconductors

2010 ◽  
Vol 97 (14) ◽  
pp. 143302 ◽  
Author(s):  
J. O. Oelerich ◽  
D. Huemmer ◽  
M. Weseloh ◽  
S. D. Baranovskii
Keyword(s):  
Energy Level ◽  
Concentration Dependence ◽  
Organic Semiconductors ◽  
Charge Carriers

scholarly journals Drift of charge carriers in crystalline organic semiconductors

2016 ◽  
Vol 144 (14) ◽  
pp. 144905 ◽  
Author(s):  
Jingjuan Dong ◽  
Wei Si ◽  
Chang-Qin Wu
Keyword(s):  
Organic Semiconductors ◽  
Charge Carriers

scholarly journals Charge carrier mobility dynamics in organic semiconductors and solar cells

2020 ◽  
Vol 60 (1) ◽  
Author(s):  
Vidmantas Gulbinas
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Organic Semiconductors ◽  
Organic Solar Cells ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Charge Carriers ◽  
Organic Layer ◽  
Stoichiometric Ratio ◽  
Donor And Acceptor

Charge carrier mobility in organic semiconductors is not a constant value unambigously characterizing some particular material, but depends on the electric field, temperature and even on time after it was generated or injected. The time dependence is particularly important for the thin-film devices where charge carriers pass the organic layer before mobility reaching its stationary value. Here we give a review of experimental techniques with ultrafast timeresolution enabling one to address the mobility kinetics and analyse properties of the time-dependent mobility in conjugated polymers and organic solar cells. We analyse kinetics during the charge carrier generation and extraction of free charge carriers. The mobility typically decreases by several orders of magnitude on a picosecond-nanosecond time scale; however, its kinetics also depends on the investigation technique. The mobility kinetics in blends for bulk heterojunction solar cells strongly depends on the stoichiometric ratio of donor and acceptor materials.

scholarly journals Understanding the evolution of the Raman spectra of molecularly p-doped poly(3-hexylthiophene-2,5-diyl): signatures of polarons and bipolarons

2022 ◽  
Author(s):  
Ahmed E. Mansour ◽  
Ana Valencia ◽  
Dominique Lungwitz ◽  
Berthold Wegner ◽  
Naoki Tanaka ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Organic Semiconductors ◽  
Charge Carriers ◽  
Polymer Semiconductors ◽  
Molecular Doping

Molecular doping is a key process to increase the density of charge carriers in organic semiconductors. Doping-induced charges in polymer semiconductors result in the formation of polarons and/or bipolarons due...

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