Overcoming the morphological and efficiency limit in all-polymer solar cells by designing conjugated random copolymers containing a naphtho[1,2c:5,6-c']bis([1,2,5] thiadiazole)] moiety

Xie R, Li Z, Zhong W, Ying L, Hu Q, Liu F, Li N, Russell TP, Huang F, Cao Y (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Publisher: ROYAL SOC CHEMISTRY

Book Volume: 6

Pages Range: 23295-23300

Journal Issue: 46

DOI: 10.1039/c8ta09356c

Abstract

The ternary concept based on two electron donors and one electron acceptor has been deployed to extend the absorption as well as photovoltaic performance of all-polymer solar cells (all-PSCs). However, it is still challenging to achieve the delicate morphology of ternary blended bulk-heterojunction films through rational molecular design. To overcome these issues, herein, we designed and synthesized a series of narrow bandgap conjugated copolymers by combining two conjugated polymers with various molar ratios of the naphthobis[1,2,5]thiadiazole (NT) unit (namely, NT00-NT100). All-PSCs were constructed by integrating these resultant copolymers with a commercially available electron-accepting copolymer N2200. The resultant all-PSCs based on the ternary copolymers NT40 exhibited an impressively high power conversion efficiency over 8.0%, which was clearly superior to that obtained for devices based on the NT00:NT100:N2200 blended films. Further characterization of the morphology of the films revealed that the incorporation of the NT unit improved - stacking and a degree of phase separation, which are conducive to exciton diffusion and charge transport.

Authors with CRIS profile

Ning Li Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

South China University of Technology (SCUT) / 华南理工大学 CN China (CN) Lawrence Berkeley National Laboratory (LBNL) US United States (USA) (US) Shanghai Jiao Tong University / 上海交通大学 CN China (CN)

How to cite

APA:

Xie, R., Li, Z., Zhong, W., Ying, L., Hu, Q., Liu, F.,... Cao, Y. (2018). Overcoming the morphological and efficiency limit in all-polymer solar cells by designing conjugated random copolymers containing a naphtho[1,2c:5,6-c']bis([1,2,5] thiadiazole)] moiety. Journal of Materials Chemistry A, 6(46), 23295-23300. https://dx.doi.org/10.1039/c8ta09356c

MLA:

Xie, Ruihao, et al. "Overcoming the morphological and efficiency limit in all-polymer solar cells by designing conjugated random copolymers containing a naphtho[1,2c:5,6-c']bis([1,2,5] thiadiazole)] moiety." Journal of Materials Chemistry A 6.46 (2018): 23295-23300.

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