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Enhanced n-Doping Efficiency of a Naphthalenediimide-Based Copolymer through Polar Side Chains for Organic Thermoelectrics
Open accessAbstract
Abstract N-doping of conjugated polymers either requires a high dopant fraction or yields a low electrical conductivity because of their poor compatibility with molecular dopants. We explore n-doping of the polar naphthalenediimide–bithiophene copolymer p(gNDI-gT2) that carries oligoethylene glycol-based side chains and show that the polymer displays superior miscibility with the benzimidazole–dimethylbenzenamine-based n-dopant N-DMBI. The good compatibility of p(gNDI-gT2) and N-DMBI results in a relatively high doping efficiency of 13% for n-dopants, which leads to a high electrical conductivity of more than 10–1 S cm–1 for a dopant concentration of only 10 mol % when measured in an inert atmosphere. We find that the doped polymer is able to maintain its electrical conductivity for about 20 min when exposed to air and recovers rapidly when returned to a nitrogen atmosphere. Overall, solution coprocessing of p(gNDI-gT2) and N-DMBI results in a larger thermoelectric power factor of up to 0.4 μW K–2 m–1 compared to other NDI-based polymers.
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Cited by
Yan, X., Xiong, M., Li, J.-T., Zhang, S., Chase, Z. A., Lu, Y., Wang, Z.-Y., Yao, Z.-F., Wang, J.-Y., Gu, X., et al. (2019) · Journal of the American Chemical Society · doi:10.1021/jacs.9b10107 · Cited by 268
Yang, K., Chen, Z., Wang, Y., & Guo, X. (2023) · Accounts of Materials Research · doi:10.1021/accountsmr.2c00237 · Cited by 72
Metadata
- Authors
- Kiefer, D., Giovannitti, A., Sun, H., Biskup, T., Hofmann, A., Koopmans, M., Cendra, C., Weber, S., Anton Koster, L. J., Olsson, E., Rivnay, J., Fabiano, S., McCulloch, I., & Müller, C.
- Venue
- ACS Energy Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-01-05
- Volume
- 3
- Issue
- 2
- Pages
- 278-285
- ISSN
- 2380-8195 (ISSN-L)
- OpenAlex
- W2781599590
- Cited by
- 275
- References
- 0
- FWCI
- 13.46
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- The paper
- Kiefer, D., Giovannitti, A., Sun, H., Biskup, T., Hofmann, A., Koopmans, M., Cendra, C., Weber, S., Anton Koster, L. J., Olsson, E., Rivnay, J., Fabiano, S., McCulloch, I., & Müller, C. (2018). Enhanced n-Doping Efficiency of a Naphthalenediimide-Based Copolymer through Polar Side Chains for Organic Thermoelectrics. ACS Energy Letters. https://doi.org/10.1021/acsenergylett.7b01146
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