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Journal article
Influence of traps and Lorentz Force on charge transport in organic semiconductors
Materials, Vol.16(13), 4691
2023
Abstract
Charge transport characteristics in organic semiconductor devices become altered in the presence of traps due to defects or impurities in the semiconductors. These traps can lead to a decrease in charge carrier mobility and an increase in recombination rates, thereby ultimately affecting the overall performance of the device. It is therefore important to understand and mitigate the impact of traps on organic semiconductor devices. In this contribution, the influence of the capture and release times of trap states, recombination rates, and the Lorentz force on the net charge of a low-mobility organic semiconductor was determined using the finite element method (FEM) and Hall effect method through numerical simulations. The findings suggest that increasing magnetic fields had a lesser impact on net charge at constant capture and release times of trap states. On the other hand, by increasing the capture time of trap states at a constant magnetic field and fixed release time, the net charge extracted from the semiconductor device increased with increasing capture time. Moreover, the net charge extracted from the semiconductor device was nearly four and eight times greater in the case of the non-Langevin recombination rates of 0.01 and 0.001, respectively, when compared to the Langevin rate. These results imply that the non-Langevin recombination rate can significantly enhance the performance of semiconductor devices, particularly in applications that require efficient charge extraction. These findings pave the way for the development of more efficient and cost-effective electronic devices with improved charge transport properties and higher power conversion efficiencies, thus further opening up new avenues for research and innovation in this area of modern semiconductor technology.
Details
- Title
- Influence of traps and Lorentz Force on charge transport in organic semiconductors
- Authors/Creators
- Seema Morab - Murdoch UniversityManickam Minakshi Sundaram - College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, AustraliaAlmantas Pivrikas - College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, Australia
- Publication Details
- Materials, Vol.16(13), 4691
- Publisher
- MDPI
- Grant note
- Australian Government
- Identifiers
- 991005593758207891
- Copyright
- © 2023 by the authors.
- Murdoch Affiliation
- Murdoch University; Centre for Water, Energy and Waste
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 2 Chemistry
- 2.114 Organic Semiconductors
- 2.114.61 Organic Solar Cells
- Web Of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering
- Physics, Applied
- Physics, Condensed Matter
- ESI research areas
- Materials Science