A Non-Conjugated Polymer Acceptor for Efficient and Thermally Stable All-Polymer Solar Cells.
Angew Chem Int Ed Engl
; 59(45): 19835-19840, 2020 Nov 02.
Article
en En
| MEDLINE
| ID: mdl-32666653
ABSTRACT
A non-conjugated polymer acceptor PF1-TS4 was firstly synthesized by embedding a thioalkyl segment in the mainchain, which shows excellent photophysical properties on par with a fully conjugated polymer, with a low optical band gap of 1.58â
eV and a high absorption coefficient >105 â
cm-1 , a high LUMO level of -3.89â
eV, and suitable crystallinity. Matched with the polymer donor PM6, the PF1-TS4-based all-PSC achieved a power conversion efficiency (PCE) of 8.63 %, which is ≈45 % higher than that of a device based on the small molecule acceptor counterpart IDIC16. Moreover, the PF1-TS4-based all-PSC has good thermal stability with ≈70 % of its initial PCE retained after being stored at 85 °C for 180â
h, while the IDIC16-based device only retained ≈50 % of its initial PCE when stored at 85 °C for only 18â
h. Our work provides a new strategy to develop efficient polymer acceptor materials by linkage of conjugated units with non-conjugated thioalkyl segments.
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Angew Chem Int Ed Engl
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2020
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Article
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Suecia