scholarly journals Modelling of the charge carrier mobility in disordered linear polymer materials

2017 ◽  
Vol 19 (11) ◽  
pp. 7760-7771 ◽  
Author(s):  
Petr Toman ◽  
Miroslav Menšík ◽  
Wojciech Bartkowiak ◽  
Jiří Pfleger
Keyword(s):  
Charge Carrier ◽  
Concentration Dependence ◽  
Carrier Mobility ◽  
Hole Mobility ◽  
Charge Carrier Mobility ◽  
Linear Polymer ◽  
Polymer Materials ◽  
P Concentration ◽  
Energetic Disorder

Concentration dependence of the hole mobility in the crystalline and amorphous P3HT calculated for different values of the local energetic disorder σε.

Charge carrier mobility of disordered organic semiconductors with correlated energetic and spatial disorder

2018 ◽  
Vol 20 (13) ◽  
pp. 8897-8908 ◽  
Author(s):  
Waldemar Kaiser ◽  
Tim Albes ◽  
Alessio Gagliardi
Keyword(s):  
Monte Carlo ◽  
Charge Carrier ◽  
Organic Semiconductors ◽  
Current Distribution ◽  
Carrier Mobility ◽  
Kinetic Monte Carlo ◽  
Monte Carlo Study ◽  
Charge Carrier Mobility ◽  
Energetic Disorder ◽  
The Impact

Kinetic Monte Carlo study of the impact of spatial and energetic disorder on charge mobility, current distribution and transport energy in organic semiconductors.

scholarly journals Charge carrier mobility and electronic properties of Al(Op)3: impact of excimer formation

2015 ◽  
Vol 6 ◽  
pp. 1107-1115 ◽  
Author(s):  
Andrea Magri ◽  
Pascal Friederich ◽  
Bernhard Schäfer ◽  
Valeria Fattori ◽  
Xiangnan Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Charge Carrier ◽  
Transport Properties ◽  
Electron Mobility ◽  
Carrier Mobility ◽  
Hole Mobility ◽  
Charge Carrier Mobility ◽  
The Other ◽  
Theoretical Simulation ◽  
Excimer Formation

We have studied the electronic properties and the charge carrier mobility of the organic semiconductor tris(1-oxo-1H-phenalen-9-olate)aluminium(III) (Al(Op)3) both experimentally and theoretically. We experimentally estimated the HOMO and LUMO energy levels to be −5.93 and −3.26 eV, respectively, which were close to the corresponding calculated values. Al(Op)3 was successfully evaporated onto quartz substrates and was clearly identified in the absorption spectra of both the solution and the thin film. A structured steady state fluorescence emission was detected in solution, whereas a broad, red-shifted emission was observed in the thin film. This indicates the formation of excimers in the solid state, which is crucial for the transport properties. The incorporation of Al(Op)3 into organic thin film transistors (TFTs) was performed in order to measure the charge carrier mobility. The experimental setup detected no electron mobility, while a hole mobility between 0.6 × 10−6 and 2.1 × 10−6 cm2·V−1·s−1 was measured. Theoretical simulations, on the other hand, predicted an electron mobility of 9.5 × 10−6 cm2·V−1·s−1 and a hole mobility of 1.4 × 10−4 cm2·V−1·s−1. The theoretical simulation for the hole mobility predicted an approximately one order of magnitude higher hole mobility than was observed in the experiment, which is considered to be in good agreement. The result for the electron mobility was, on the other hand, unexpected, as both the calculated electron mobility and chemical common sense (based on the capability of extended aromatic structures to efficiently accept and delocalize additional electrons) suggest more robust electron charge transport properties. This discrepancy is explained by the excimer formation, whose inclusion in the multiscale simulation workflow is expected to bring the theoretical simulation and experiment into agreement.

scholarly journals Effects of Molecular Structure on Intramolecular Charge Carrier Transport in Dithieno [3,2-b: -d] Pyrrole-Based Conjugated Copolymers

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Yoshihito Honsho ◽  
Akinori Saeki ◽  
Shu Seki
Keyword(s):  
Charge Carrier ◽  
Conjugated Polymer ◽  
Carrier Mobility ◽  
Carrier Transport ◽  
Hole Mobility ◽  
Charge Carrier Mobility ◽  
Charge Carriers ◽  
Coupling Reactions ◽  
Time Resolved ◽  
Yamamoto Coupling

Intramolecular mobility of positive charge carriers in conjugated polymer films based on dithieno [2,3-b: -d] pyrrole (DTP) is studied by time-resolved microwave conductivity (TRMC). A series of DTP homopolymer and copolymers combined with phenyl, 2,-biphenyl, thiophene, 2,-bithiophene, and 9,-dioctylfluorene were synthesized by Suzuki-Miyaura and Yamamoto coupling reactions. Polymers containing DTP unit are reported to show high value of hole mobility measured by FET method, and this type of polymers is expected to have stable HOMO orbitals which are important for hole transportation. Among these copolymers, DTP coupled with 9,-dioctylfluorene copolymer showed the highest charge carrier mobility as high as 1.7 cm2/Vs, demonstrating an excellent electrical property on rigid copolymer backbones.

Model of the influence of energetic disorder on inter-chain charge carrier mobility in poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylene vinylene]

2009 ◽  
Vol 20 (3) ◽  
pp. 263-267 ◽  
Author(s):  
Petr Toman ◽  
Stanislav Nešpůrek ◽  
Martin Weiter ◽  
Martin Vala ◽  
Juliusz Sworakowski ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Phenylene Vinylene ◽  
Energetic Disorder

scholarly journals Synergistic Effects of Processing Additives and Thermal Annealing on Nanomorphology and Hole Mobility of Poly(3-hexylthiophene) Thin Films

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 112 ◽  
Author(s):  
Min Park ◽  
Felix Kim
Keyword(s):  
Charge Carrier ◽  
Thermal Annealing ◽  
Organic Solar Cells ◽  
Carrier Mobility ◽  
Morphological Changes ◽  
Synergistic Effects ◽  
Diphenyl Ether ◽  
Hole Mobility ◽  
Charge Carrier Mobility ◽  
Molecular Ordering

Control of the nanoscale molecular ordering and charge-carrier mobility of poly(3-hexylthiophene-2,5-diyl) (P3HT) was achieved by the combined use of processing additives and thermal annealing. Evaluation of four processing additives (1,8-octanedithiol (ODT), diphenyl ether (DPE), 1-chloronaphthalene (CN), and 1,8-diiodooctane (DIO), which are commonly used for the fabrication of organic solar cells, revealed that the nanoscale molecular ordering and, therefore, the charge-carrier mobility, are largely affected by the additives, as demonstrated by spectral absorption, X-ray diffraction, and atomic force microscopy. Thermal annealing selectively influenced the morphological changes, depending on the solubility of P3HT in the additive at high temperature. In the case of CN, in which P3HT can be dissolved at moderate temperature, significant molecular ordering was observed even without thermal annealing. For DIO, in which P3HT is only soluble at elevated temperature, the mobility reached 1.14 × 10−1 cm2 V−1 s−1 only after annealing. ODT and DPE were not effective as processing additives in a single-component P3HT. This study provides insight for designing the processing conditions to control the morphology and charge-transport properties of polymers.

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