In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 10 ( 2023), p. 3533-3541
Kurzfassung:
Further advancement of all-polymer solar cells (all-PSCs) requires a new polymerization design strategy to develop ideal polymer acceptors that possess and retain maximally the advantages of narrow bandgap non-fullerene acceptor building blocks. In this work, we report a new design strategy to synthesize a polymerized small molecule acceptor PT-BTP with a double-cable structure composed of a fused-ring Y-series acceptor framework as a pendant side unit and thiophene derivative as the conjugated backbone. PT-BTP exhibits a narrow optical bandgap of 1.35 eV and high electron mobility as well as a favorable BHJ blend morphology when blended with polymer donor PM6, resulting in good photovoltaic performance. The optimized PM6:PT-BTP all-PSCs displayed a high PCE of 12.13% with an energy loss ( E loss ) of 0.566 eV and a small non-radiative recombination loss (Δ E 3 ) of 0.227 eV. In contrast, the as-cast devices only showed a lower PCE of 8.14% with inferior E loss and Δ E 3 values. This work enables a new molecular design direction to construct narrow bandgap P A s toward successful applications in high-performance all-PSCs.
Materialart:
Online-Ressource
ISSN:
2050-7526
,
2050-7534
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2023
ZDB Id:
2702245-6