Molecular Doping Efficiency in Organic Semiconductors: Fundamental Principle and Promotion Strategy

2021 ◽  
pp. 2111351
Author(s):  
Han Yan ◽  
Wei Ma
Keyword(s):  
Organic Semiconductors ◽  
Fundamental Principle ◽  
Promotion Strategy ◽  
Molecular Doping

Molecular doping in organic semiconductors: fully solution-processed, vacuum-free doping with metal–organic complexes in an orthogonal solvent

2017 ◽  
Vol 5 (46) ◽  
pp. 12023-12030 ◽  
Author(s):  
Ryo Fujimoto ◽  
Yu Yamashita ◽  
Shohei Kumagai ◽  
Junto Tsurumi ◽  
Alexander Hinderhofer ◽  
...  
Keyword(s):  
Carrier Concentration ◽  
Organic Semiconductors ◽  
High Carrier Concentration ◽  
Solution Processed ◽  
Organic Complexes ◽  
Metal Organic ◽  
High Carrier ◽  
Molecular Doping ◽  
Orthogonal Solvent

A novel route of molecular doping in organic semiconductors is demonstrated to achieve high carrier concentration.

scholarly journals Structural insights into Lewis acid and F4TCNQ doped conjugated polymers by solid-state magnetic resonance spectroscopy

2022 ◽  
Author(s):  
Alana Dixon ◽  
Herve Vezin ◽  
Thuc-Quyen Nguyen ◽  
G. N. Manjunatha Reddy
Keyword(s):  
Solid State ◽  
Magnetic Resonance ◽  
Conjugated Polymers ◽  
Organic Semiconductors ◽  
Carrier Mobility ◽  
Molecular Level ◽  
Charge Carrier Mobility ◽  
Resonance Spectroscopy ◽  
Molecular Doping ◽  
Structural Insights

Molecular doping strategies facilitate orders of magnitudes enhancements in the charge carrier mobility of organic semiconductors (OSCs). Understanding the mechanisms of different doping strategies for OSCs and molecular-level constraints on...

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>

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...

scholarly journals Microscopic Insights into Charge Formation and Energetics in N-Doped Organic Semiconductors

2021 ◽  
Author(s):  
Chuanding Dong ◽  
Stefan Schumacher
Keyword(s):  
Organic Semiconductors ◽  
Energetic Cost ◽  
Charge Generation ◽  
Host Matrix ◽  
Macroscopic System ◽  
Molecular Charge ◽  
Efficient Charge ◽  
Molecular Doping ◽  
The Individual ◽  
Made In

<p>In the molecular doping of organic semiconductors</p><p>(OSC), achieving efficient charge generation</p><p>and managing the energetic cost for charge</p><p>release from local molecular charge transfer</p><p>complexes (CTCs) to the host matrix is of</p><p>central importance. Experimentally tremendous</p><p>progress has been made in this direction.</p><p>However, the relation between OSC film</p><p>structure on a nanoscopic level including different</p><p>inter-molecular geometrical arrangements</p><p>and the macroscopic properties of doped OSC</p><p>films is usually only established quite indirectly.</p><p>Explicit microscopic insights into the underlying</p><p>doping mechanisms and resulting electronic</p><p>structure are still scarce and mostly limited</p><p>to the study of the individual molecular constituents</p><p>or isolated bi-molecular dopant:host</p><p>complexes. In the present study we investigate</p><p>n-type doping of the frequently investigated</p><p>OSC materials ZnPC and F8ZnPc and</p><p>their mixtures which are n-doped with 2-Cyc-</p><p>DMBI. We report significant electronic differences</p><p>for complexes with nominally the same</p><p>material composition but different geometrical</p><p>structures. One specific important finding in</p><p>this context is that complexes containing two</p><p>adjacent dopant molecules show much reduced</p><p>ionization energy values, leading to substantially</p><p>reduced energy cost for charge release. Furthermore our results demonstrate that important</p><p>trends towards macroscopic system behavior</p><p>can already be obtained with increasing</p><p>size and varying composition of the relatively</p><p>small molecular dopant-host complexes considered,</p><p>including systematic shifts in the Fermi</p><p>level energies in the doped OSC.</p>

Theoretical study on the charge transport and metallic conducting properties in organic complexes

2019 ◽  
Vol 21 (24) ◽  
pp. 13304-13318 ◽  
Author(s):  
Ya-Rui Shi ◽  
Yu-Fang Liu
Keyword(s):  
Charge Transfer ◽  
Electrical Properties ◽  
Charge Transport ◽  
Organic Semiconductors ◽  
Electron Acceptor ◽  
Transfer Process ◽  
Theoretical Study ◽  
Charge Transfer Process ◽  
Organic Complexes ◽  
Molecular Doping

The charge transfer process between substrate molecular and dopant always appears in doped organic semiconductors, so that molecular doping is a common method to improve the electrical properties by combining appropriate complexes of electron acceptor and donor molecules.

N-Type Molecular Doping in Organic Semiconductors: Formation and Dissociation Efficiencies of a Charge Transfer Complex

2016 ◽  
Vol 120 (17) ◽  
pp. 9475-9481 ◽  
Author(s):  
Jae-Min Kim ◽  
Seung-Jun Yoo ◽  
Chang-Ki Moon ◽  
Bomi Sim ◽  
Jae-Hyun Lee ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Organic Semiconductors ◽  
Charge Transfer Complex ◽  
Molecular Doping ◽  
A Charge

Unraveling the Mechanism of Molecular Doping in Organic Semiconductors

2012 ◽  
Vol 24 (12) ◽  
pp. 1535-1539 ◽  
Author(s):  
Alexander Mityashin ◽  
Yoann Olivier ◽  
Tanguy Van Regemorter ◽  
Cedric Rolin ◽  
Stijn Verlaak ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Molecular Doping
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