In:
Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 15, No. 4 ( 2022), p. 1563-1572
Abstract:
The ternary strategy has been identified as a feasible and effective way to obtain high-efficiency organic solar cells (OSCs). However, for most ternary OSCs, the voltage loss ( V loss ) lies between those of the two binary devices, which inevitably limits the further efficiency improvements. Herein, a non-fullerene acceptor ZY-4Cl, possessing complementary absorption spectra and forming a cascade LUMO energy level alignment with the PM6:BTP-eC9 blend, was introduced as a third component to fabricate ternary OSCs. Compared to the binary blends, the ternary system exhibits reduced density of trap states, improved molecular ordering, and suppressed non-radiative recombination, and thereby yields an obviously lower V loss than either of the binary OSCs. As a result, high efficiencies of 18.69% (certified as 18.2%) and 16.07% are obtained for the rigid and flexible OSCs, respectively. This work highlights the importance of suppressing non-radiative recombination in OSCs by using a ternary strategy and expands an effective avenue for the realization of efficient wearable electronics as novel photovoltaic power sources.
Type of Medium:
Online Resource
ISSN:
1754-5692
,
1754-5706
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2439879-2
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