Non-fullerene acceptors exhibit {great|fantastic|excellent|wonderful|good|terrific} {potential|possible|prospective} {to improve|to enhance} photovoltaic performances of organic solar cells. {However|Nevertheless|Nonetheless|Even so|On the other hand|Having said that}, {it is|it’s|it really is|it truly is|it can be|it is actually} {important|essential|crucial|critical|significant|vital} to {further|additional} {enhance|improve|boost} chemical stability and device durability for future commercialization, {especially|particularly|specifically|specially|in particular} for Y6-series {small|little|tiny|modest|smaller|compact} molecule acceptors with 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC) {type|kind|sort|variety|form} as ending group. {In this|Within this} {work|function|perform|operate}, an IC-free photovoltaic material YF-CN consisting of 2-fluoren-9-ylidenepropanedinitrile terminal was {designed|developed|created|made} and synthesized by stille coupling. YF-CN exhibited closed-shell chemical structure with enhanced photostability and {improved|enhanced} morphological compatibility {with the|using the|with all the|together with the} binary PCE10:Y6 blend. The moderate {energy|power} level {makes|tends to make} YF-CN could serve as a multifunctional material, {such as|like|including|for example|for instance|which include} donor, acceptor {and the|and also the|as well as the|along with the|plus the} third {component|element}. When adding YF-CN as second donor into PCE10:Y6 {system|method|program|technique}, an {improved|enhanced} {power|energy} conversion efficiency of 12.03% was {achieved|accomplished} for as-cast device. Importantly, the ternary PCE10:YF-CN:Y6-devices showed enhanced storage durability {maintaining|sustaining|preserving|keeping} 91% of initial PCE {after|following|right after|soon after|immediately after|just after} the 360 hours. This {work|function|perform|operate} {provides|offers|gives|supplies|delivers} new {perspective|viewpoint|point of view} {to understand|to know} the open-shell character of donor and closed-shell structure of acceptors, respectively, {as well|also|too|at the same time} as promising {design|style|design and style} {concept|idea|notion} of {stable|steady} IC-free acceptors for organic solar cells. 7-(Benzyloxy)-4-chloroquinoline Chemical name 1196157-42-2 Chemical name PMID:35850484
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