The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors
Molecular doping is an effective method to enhance the charge carrier density for reducing the contact resistance and improving the charge mobility in organic field-effect transistors (OFETs). Previous reports mainly focus on the strong dopants with the EAdopant > IEOSC (p-type) or IEdopant <...
| Main Authors: | , , , , , |
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| 格式: | Journal Article |
| 语言: | English |
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2020
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| 主题: | |
| 在线阅读: | https://hdl.handle.net/10356/140988 |
| _version_ | 1826115918874279936 |
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| author | Wang, Zongrui Zou, Ye Chen, Wangqiao Huang, Yinjuan Yao, Changjiang Zhang, Qichun |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Wang, Zongrui Zou, Ye Chen, Wangqiao Huang, Yinjuan Yao, Changjiang Zhang, Qichun |
| author_sort | Wang, Zongrui |
| collection | NTU |
| description | Molecular doping is an effective method to enhance the charge carrier density for reducing the contact resistance and improving the charge mobility in organic field-effect transistors (OFETs). Previous reports mainly focus on the strong dopants with the EAdopant > IEOSC (p-type) or IEdopant < EAOSC (n-type) to enable the efficient charge transfer (EA: electron affinity; IE: ionization energy; OSC: organic semiconductor). However, the effects of weak dopants on the OFET performance of OSC are rarely investigated. Thus, in this study, it is demonstrated that two new fluorinated compounds (Tetrafluorophthalonitrile (TFP) and Octafluoronaphthalene (OFN)) can act as weak dopants in thin film of TIPS-Pentacene (TIPS). Although they exhibit unmatched EAs (3.45 eV for TFP and 3.44 eV for OFN) compared to the IE (5.17 eV) of the host TIPS, they still can fulfill the p-type doping with the OSC matrix. Systematic structural and electrical characterization reveals the important role of the formed charge-transfer interaction and the improved crystallinity in enhancing the carrier mobility. The doped poly(3-hexylthiophene) is also investigated to confirm the universality of the weak dopants. The study should provide a new thought for the exploitation of novel planar soluble weak dopants in OFETs. |
| first_indexed | 2024-10-01T04:02:58Z |
| format | Journal Article |
| id | ntu-10356/140988 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:02:58Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1409882020-06-03T05:53:41Z The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors Wang, Zongrui Zou, Ye Chen, Wangqiao Huang, Yinjuan Yao, Changjiang Zhang, Qichun School of Materials Science and Engineering Engineering::Materials Molecular Doping Solution-processed Organic Field-effect Transistors Molecular doping is an effective method to enhance the charge carrier density for reducing the contact resistance and improving the charge mobility in organic field-effect transistors (OFETs). Previous reports mainly focus on the strong dopants with the EAdopant > IEOSC (p-type) or IEdopant < EAOSC (n-type) to enable the efficient charge transfer (EA: electron affinity; IE: ionization energy; OSC: organic semiconductor). However, the effects of weak dopants on the OFET performance of OSC are rarely investigated. Thus, in this study, it is demonstrated that two new fluorinated compounds (Tetrafluorophthalonitrile (TFP) and Octafluoronaphthalene (OFN)) can act as weak dopants in thin film of TIPS-Pentacene (TIPS). Although they exhibit unmatched EAs (3.45 eV for TFP and 3.44 eV for OFN) compared to the IE (5.17 eV) of the host TIPS, they still can fulfill the p-type doping with the OSC matrix. Systematic structural and electrical characterization reveals the important role of the formed charge-transfer interaction and the improved crystallinity in enhancing the carrier mobility. The doped poly(3-hexylthiophene) is also investigated to confirm the universality of the weak dopants. The study should provide a new thought for the exploitation of novel planar soluble weak dopants in OFETs. MOE (Min. of Education, S’pore) 2020-06-03T05:53:41Z 2020-06-03T05:53:41Z 2018 Journal Article Wang, Z., Zou, Y., Chen, W., Huang, Y., Yao, C., & Zhang, Q. (2019). The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors. Advanced Electronic Materials, 5(2), 1800547-. doi:10.1002/aelm.201800547 2199-160X https://hdl.handle.net/10356/140988 10.1002/aelm.201800547 2-s2.0-85056771911 2 5 en Advanced Electronic Materials © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. |
| spellingShingle | Engineering::Materials Molecular Doping Solution-processed Organic Field-effect Transistors Wang, Zongrui Zou, Ye Chen, Wangqiao Huang, Yinjuan Yao, Changjiang Zhang, Qichun The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors |
| title | The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors |
| title_full | The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors |
| title_fullStr | The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors |
| title_full_unstemmed | The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors |
| title_short | The role of weak molecular dopants in enhancing the performance of solution-processed organic field-effect transistors |
| title_sort | role of weak molecular dopants in enhancing the performance of solution processed organic field effect transistors |
| topic | Engineering::Materials Molecular Doping Solution-processed Organic Field-effect Transistors |
| url | https://hdl.handle.net/10356/140988 |
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