Morphology Optimization via Side Chain Engineering Enables All Polymer Solar Cells with Excellent Fill Factor and Stability

Journal article
(Original article)


Publication Details

Author(s): Liu X, Zhang C, Duan C, Li M, Hu Z, Wang J, Liu F, Li N, Brabec C, Janssen RAJ, Bazan GC, Huang F, Cao Y
Journal: Journal of the American Chemical Society
Publisher: AMER CHEMICAL SOC
Publication year: 2018
Volume: 140
Journal issue: 28
Pages range: 8934-8943
ISSN: 0002-7863
Language: English


Abstract

All-polymer solar cells (all-PSCs) composed of conjugated polymers as both donor and acceptor components in bulk heterojunction photoactive layers have attracted increasing attention. However, it is a big challenge to achieve optimal morphology in polymer:polymer blends. In response, we report herein a new strategy to adjust the nanoscale organization for all-PSCs. Specifically, side chain engineering of the well-known naphthalene diimide (NDI)-based polymer N2200 is modulated by introducing a fraction of linear oligoethylene oxide (OE) side chains to replace branched alkyl chains on the NDI units and by synthesizing a series of NDI-based polymer acceptors NOEx, where x is the percentage of OE chain substituted NDI units relative to total NDI units. Compared to the reference polymer NOE0, OE-chain-containing polymer NOE10 offers a much higher power conversion efficiency (PCE) of 8.1% with a record high fill factor (FF) of 0.75 in all-PSCs. Moreover, the NOE10-based all-PSC exhibits excellent long-term and thermal stabilities with >97% of the initial PCE being maintained after 300 h of aging at 65 degrees C. This work demonstrates an effective morphology optimization strategy to achieve highly efficient and stable all-PSCs and shows the excellent potential of NOE10 as an alternative to commercially available acceptor polymers N2200.


FAU Authors / FAU Editors

Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Li, Ning Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Zhang, Chaohong
Institute Materials for Electronics and Energy Technology (i-MEET)


External institutions
Eindhoven University of Technology / Technische Universiteit Eindhoven (TU/e)
Shanghai Jiao Tong University / 上海交通大学
South China University of Technology (SCUT) / 华南理工大学
University of California


How to cite

APA:
Liu, X., Zhang, C., Duan, C., Li, M., Hu, Z., Wang, J.,... Cao, Y. (2018). Morphology Optimization via Side Chain Engineering Enables All Polymer Solar Cells with Excellent Fill Factor and Stability. Journal of the American Chemical Society, 140(28), 8934-8943. https://dx.doi.org/10.1021/jacs.8b05038

MLA:
Liu, Xi, et al. "Morphology Optimization via Side Chain Engineering Enables All Polymer Solar Cells with Excellent Fill Factor and Stability." Journal of the American Chemical Society 140.28 (2018): 8934-8943.

BibTeX: 

Last updated on 2018-11-10 at 14:50