Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule Semiconductors
Abstract In the development of high‐performance organic thermoelectric devices, n‐type materials, especially with small molecule semiconductors, lags far behind p‐type materials. In this paper, three small molecules are synthesized based on electron‐deficient naphthalene bis‐isatin building blocks b...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202204872 |
| _version_ | 1797943393041514496 |
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| author | Jiayao Duan Jiamin Ding Dongyang Wang Xiuyuan Zhu Junxin Chen Genming Zhu Chaoyue Chen Yaping Yu Hailiang Liao Zhengke Li Chong‐an Di Wan Yue |
| author_facet | Jiayao Duan Jiamin Ding Dongyang Wang Xiuyuan Zhu Junxin Chen Genming Zhu Chaoyue Chen Yaping Yu Hailiang Liao Zhengke Li Chong‐an Di Wan Yue |
| author_sort | Jiayao Duan |
| collection | DOAJ |
| description | Abstract In the development of high‐performance organic thermoelectric devices, n‐type materials, especially with small molecule semiconductors, lags far behind p‐type materials. In this paper, three small molecules are synthesized based on electron‐deficient naphthalene bis‐isatin building blocks bearing different alkyl chains with the terminal functionalized with 3‐ethylrhodanine unit and studied their aggregation and doping mechanism in detail. It is found that crystallinity plays an essential role in tuning the doping behavior of small molecules. Molecules with too strong crystallinity tend to aggregate with each other to form large crystalline domains, which cause significant performance degradation. While molecules with weak crystallinity can tolerate more dopants, most of them exhibit low mobility. By tuning the crystallinity carefully, organic thermoelectric devices based on C12NR can maintain high mobility and realize effective doping simultaneously, and a high power factor of 1.07 µW m−1 K−2 at 100 °C is realized. This delicate molecular design by modulating crystallinity provides a new avenue for realizing high‐performance organic thermoelectric devices. |
| first_indexed | 2024-04-10T20:23:27Z |
| format | Article |
| id | doaj.art-b60b8ac6901440259a194c7eb6a28ea4 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-10T20:23:27Z |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-b60b8ac6901440259a194c7eb6a28ea42023-01-25T13:47:49ZengWileyAdvanced Science2198-38442023-01-01103n/an/a10.1002/advs.202204872Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule SemiconductorsJiayao Duan0Jiamin Ding1Dongyang Wang2Xiuyuan Zhu3Junxin Chen4Genming Zhu5Chaoyue Chen6Yaping Yu7Hailiang Liao8Zhengke Li9Chong‐an Di10Wan Yue11Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaBeijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaBeijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaBeijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaGuangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. ChinaAbstract In the development of high‐performance organic thermoelectric devices, n‐type materials, especially with small molecule semiconductors, lags far behind p‐type materials. In this paper, three small molecules are synthesized based on electron‐deficient naphthalene bis‐isatin building blocks bearing different alkyl chains with the terminal functionalized with 3‐ethylrhodanine unit and studied their aggregation and doping mechanism in detail. It is found that crystallinity plays an essential role in tuning the doping behavior of small molecules. Molecules with too strong crystallinity tend to aggregate with each other to form large crystalline domains, which cause significant performance degradation. While molecules with weak crystallinity can tolerate more dopants, most of them exhibit low mobility. By tuning the crystallinity carefully, organic thermoelectric devices based on C12NR can maintain high mobility and realize effective doping simultaneously, and a high power factor of 1.07 µW m−1 K−2 at 100 °C is realized. This delicate molecular design by modulating crystallinity provides a new avenue for realizing high‐performance organic thermoelectric devices.https://doi.org/10.1002/advs.202204872crystallinity tuningn‐type small moleculesorganic thermoelectric devices |
| spellingShingle | Jiayao Duan Jiamin Ding Dongyang Wang Xiuyuan Zhu Junxin Chen Genming Zhu Chaoyue Chen Yaping Yu Hailiang Liao Zhengke Li Chong‐an Di Wan Yue Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule Semiconductors Advanced Science crystallinity tuning n‐type small molecules organic thermoelectric devices |
| title | Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule Semiconductors |
| title_full | Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule Semiconductors |
| title_fullStr | Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule Semiconductors |
| title_full_unstemmed | Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule Semiconductors |
| title_short | Enhancing the Performance of N‐Type Thermoelectric Devices via Tuning the Crystallinity of Small Molecule Semiconductors |
| title_sort | enhancing the performance of n type thermoelectric devices via tuning the crystallinity of small molecule semiconductors |
| topic | crystallinity tuning n‐type small molecules organic thermoelectric devices |
| url | https://doi.org/10.1002/advs.202204872 |
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