Step-saving synthesis of star-shaped hole-transporting materials with carbazole or phenothiazine coresviaoptimized C-H/C-Br coupling reactions

Jui Heng Chen, Kun Mu Lee, Chang Chieh Ting, Ching Yuan Liu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In most research papers, synthesis of organic hole-transporting materials relies on a key-reaction: Stille cross-couplings. This requires tedious prefunctionalizations including the preparation and treatment of unstable organolithium and toxicity-concern organotin reagents. In contrast to traditional multistep synthesis, this work describes that a series of star-shaped small molecules with a carbazole or phenothiazine core can be efficiently synthesized through a shortcut using optimized direct C-H/C-Br cross-couplings as the key step, thus avoiding dealing with the highly reactive organolithium or the toxic organotin species. Device fabrication of perovskite solar cells employing these molecules (6-13) as hole-transporting layers exhibit promising power conversion efficiencies of up to 17.57%.

Original languageEnglish
Pages (from-to)8879-8885
Number of pages7
JournalRSC Advances
Volume11
Issue number15
DOIs
StatePublished - 15 Feb 2021

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