Abstract
This work reports the first conjugated polymer with multidirectional orientations and highlights its importance to the performance of devices. Specifically, a novel conjugated polymer N2200-NDI combining poly(naphthalenediimide-alt-bithiophene) backbone with naphthalenediimide (NDI) side units has been synthesized and characterized. N2200-NDI possesses not only a wide absorption spectra and deep energy levels but also a distinctive aggregation state. As confirmed by two-dimensional grazing-incidence X-ray scattering, the polymer backbone prefers a typical face-on packing mode, while NDI side units present an oblique arrangement with a lateral rotation dihedral angle of 30°. Such unique multidirectional orientations endow N2200-NDI with multichannel electron transport. Furthermore, the space-charge-limited current electron mobility, short-circuit current density, and fill factor of PBDB-T:N2200-NDI-based solar cells are obviously positively correlated with the lateral diffraction intensity of NDI side units. These findings provide a new strategy to construct conjugated polymers with distinct charge transport property.
| Original language | English |
|---|---|
| Pages (from-to) | 9279-9286 |
| Number of pages | 8 |
| Journal | Macromolecules |
| Volume | 53 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 10 Nov 2020 |
Bibliographical note
Funding Information:We thank Prof. Junfeng Xiang from the Institute of Chemistry, Chinese Academy of Sciences, for NMR measurements. This study was jointly supported by MOST (2018YFA0208504, 2017YFA0204702) and NSFC (51773207, 21905018, 52073016, 22075293) of China. This work was further supported by the Fundamental Research Funds for the Central Universities (XK1802-2) and Jiangxi Provincial Department of Science and Technology (No. 20192ACB20009).
Funding Information:
We thank Prof. Junfeng Xiang from the Institute of Chemistry Chinese Academy of Sciences, for NMR measurements. This study was jointly supported by MOST (2018YFA0208504, 2017YFA0204702) and NSFC (51773207, 21905018, 52073016, 22075293) of China. This work was further supported by the Fundamental Research Funds for the Central Universities (XK1802-2) and Jiangxi Provincial Department of Science and Technology (No. 20192ACB20009).
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Funding
We thank Prof. Junfeng Xiang from the Institute of Chemistry, Chinese Academy of Sciences, for NMR measurements. This study was jointly supported by MOST (2018YFA0208504, 2017YFA0204702) and NSFC (51773207, 21905018, 52073016, 22075293) of China. This work was further supported by the Fundamental Research Funds for the Central Universities (XK1802-2) and Jiangxi Provincial Department of Science and Technology (No. 20192ACB20009). We thank Prof. Junfeng Xiang from the Institute of Chemistry Chinese Academy of Sciences, for NMR measurements. This study was jointly supported by MOST (2018YFA0208504, 2017YFA0204702) and NSFC (51773207, 21905018, 52073016, 22075293) of China. This work was further supported by the Fundamental Research Funds for the Central Universities (XK1802-2) and Jiangxi Provincial Department of Science and Technology (No. 20192ACB20009).