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- W4387609063 abstract "The efficacy of three bifunctional organic materials, referred as Qu ‐HTMs, is showcased in this study. These materials comprise a quinoxaline core, functionalized with carboxylic acid and nitrile as electron acceptors and triphenylamine as an electron donor. These Qu ‐HTMs demonstrated excellent thermal stability and coplanarity, which facilitated a dense packing in an ordered arrangement. This can be attributed to the sulfur‐sulfur interaction that promotes intermolecular attractions. In addition to passivating the coordination defects of Pb 2+ in the perovskite layer, Qu ‐HTMs also enhanced the charge mobility, J sc and V oc of perovskite solar cells (PSCs). The observations indicate that the annealing processes between the interface of Qu‐CN and perovskite, as well as Qu‐COOH and perovskite, lead to the formation of the α / δ phase on the surface of perovskite, which is advantageous for charge conduction. Using Qu‐CN as HTM and Qu‐COOH as a passivator in anti‐solvent showed the best performance, which exhibited a J sc of 23.36 mA·cm −2 , a V oc of 1.09 V and a fill factor of 0.802, corresponding to an overall conversion efficiency of 20.42% (cf. a control device 17.25 % of spiro‐OMeTAD ). After 480 hours operation, the device can maintain 70% of original efficiency. This work demonstrates that the quinoxaline derivatives with appropriate functional groups are effective hole‐transporting materials of high efficiency. This article is protected by copyright. All rights reserved." @default.
- W4387609063 created "2023-10-14" @default.
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- W4387609063 date "2023-10-13" @default.
- W4387609063 modified "2023-10-14" @default.
- W4387609063 title "Quinoxaline‐based materials that exhibit a significant passivation effect and lead to the enhancement in the power conversion efficiency of perovskite solar cells" @default.
- W4387609063 doi "https://doi.org/10.1002/solr.202300692" @default.
- W4387609063 hasPublicationYear "2023" @default.
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