Deciphering the Effects of Molecular Dipole Moments on the Photovoltaic Performance of Organic Solar Cells
© 2023 Wiley-VCH GmbH..
The dielectronic constant of organic semiconductor materials is directly related to its molecule dipole moment, which can be used to guide the design of high-performance organic photovoltaic materials. Herein, two isomeric small molecule acceptors, ANDT-2F and CNDT-2F, are designed and synthesized by using the electron localization effect of alkoxy in different positions of naphthalene. It is found that the axisymmetric ANDT-2F exhibits a larger dipole moment, which can improve exciton dissociation and charge generation efficiencies due to the strong intramolecular charge transfer effect, resulting in the higher photovoltaic performance of devices. Moreover, PBDB-T:ANDT-2F blend film exhibits larger and more balanced hole and electron mobility as well as nanoscale phase separation due to the favorable miscibility. As a result, the optimized device based on axisymmetric ANDT-2F shows a JSC of 21.30 mA cm-2 , an FF of 66.21%, and a power conversion energy of 12.13%, higher than that of centrosymmetric CNDT-2F-based device. This work provides important implications for designing and synthesizing efficient organic photovoltaic materials by tuning their dipole moment.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:44 |
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| Enthalten in: |
Macromolecular rapid communications - 44(2023), 23 vom: 15. Dez., Seite e2300213 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ji, Xiaofei [VerfasserIn] |
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| Links: |
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| Themen: |
Acceptors |
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| Anmerkungen: |
Date Completed 11.12.2023 Date Revised 11.12.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1002/marc.202300213 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a The dielectronic constant of organic semiconductor materials is directly related to its molecule dipole moment, which can be used to guide the design of high-performance organic photovoltaic materials. Herein, two isomeric small molecule acceptors, ANDT-2F and CNDT-2F, are designed and synthesized by using the electron localization effect of alkoxy in different positions of naphthalene. It is found that the axisymmetric ANDT-2F exhibits a larger dipole moment, which can improve exciton dissociation and charge generation efficiencies due to the strong intramolecular charge transfer effect, resulting in the higher photovoltaic performance of devices. Moreover, PBDB-T:ANDT-2F blend film exhibits larger and more balanced hole and electron mobility as well as nanoscale phase separation due to the favorable miscibility. As a result, the optimized device based on axisymmetric ANDT-2F shows a JSC of 21.30 mA cm-2 , an FF of 66.21%, and a power conversion energy of 12.13%, higher than that of centrosymmetric CNDT-2F-based device. This work provides important implications for designing and synthesizing efficient organic photovoltaic materials by tuning their dipole moment | ||
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| 650 | 4 | |a efficiency | |
| 650 | 4 | |a energy levels | |
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| 700 | 1 | |a Wang, Ting |e verfasserin |4 aut | |
| 700 | 1 | |a Fu, Qiang |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Dongxue |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Ziang |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Mingtao |e verfasserin |4 aut | |
| 700 | 1 | |a Woo, Han Young |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Yongsheng |e verfasserin |4 aut | |
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