Polymer Acceptors with Flexible Spacers Afford Efficient and Mechanically Robust All-Polymer Solar Cells

Cited 14 time in webofscience Cited 0 time in scopus
  • Hit : 62
  • Download : 0
High efficiency and mechanical robustness are both crucial for the practical applications of all-polymer solar cells (all-PSCs) in stretchable and wearable electronics. In this regard, we report a series of new polymer acceptors (PAs) by incorporating a flexible conjugation-break spacer (FCBS) to achieve highly efficient and mechanically robust all-PSCs. Incorporation of FCBS affords the effective modulation of the crystallinity and pre-aggregation of the PAs, and achieves the optimal blend morphology with polymer donor (PD), increasing both the photovoltaic and mechanical properties of all-PSCs. In particular, the all-PSC based on PYTS-0.3 as a PA incorporated with 30% FCBS and a PD (PBDB-T) demonstrates a high power conversion efficiency (PCE) of 14.68% and excellent mechanical stretchability with a crack onset strain (COS) of 21.64% and toughness of 3.86 MJ m–3, which is significantly superior to those of devices with the PA without the FCBS (PYTS-0.0, PCE = 13.01% and toughness = 2.70 MJ m–3). To date, this COS is the highest value reported for PSCs with PCEs of over 8% without any insulating additives. These results reveal that the introduction of FCBS into the conjugated backbone is a highly feasible strategy to simultaneously improve the PCE and stretchability of PSCs.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2022-02
Language
English
Article Type
Article
Citation

ADVANCED MATERIALS, v.34, no.6, pp.2107361

ISSN
0935-9648
DOI
10.1002/adma.202107361
URI
http://hdl.handle.net/10203/292405
Appears in Collection
ME-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 14 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0