Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 27, Issue 31, Pages 8060-8061Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202101412
Keywords
hole transporting material; perovskite solar cells; photovoltaics; pillar[5]arene; triarylamine
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Multi-branched molecules based on pillar[5]arene have shown promising performance as hole-transporting materials in perovskite solar cells. The dendrimer-like compounds derived from extended triarylamine dendrons exhibit improved hole transporting properties from the first to the second generation. Furthermore, economic analysis indicates that the pillar[5]arene-based material is more cost-effective compared to the reference material.
Multi-branched molecules have recently demonstrated interesting behaviour as charge-transporting materials within the fields of perovskite solar cells (PSCs). For this reason, extended triarylamine dendrons have been grafted onto a pillar[5]arene core to generate dendrimer-like compounds, which have been used as hole-transporting materials (HTMs) for PSCs. The performances of the solar cells containing these novel compounds have been extensively investigated. Interestingly, a positive dendritic effect has been evidenced as the hole transporting properties are improved when going from the first to the second-generation compound. The stability of the devices based on the best performing pillar[5]arene material has been also evaluated in a high-throughput ageing setup for 500 h at high temperature. When compared to reference devices prepared from spiro-OMeTAD, the behaviour is similar. An analysis of the economic advantages arising from the use of the pillar[5]arene-based material revealed however that our pillar[5]arene-based material is cheaper than the reference.
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