3 years ago

Synthesis and Properties of Dithiafulvenyl Functionalized Spiro[fluorene-9,9′-xanthene] Molecules

Synthesis and Properties of Dithiafulvenyl Functionalized
Spiro[fluorene-9,9′-xanthene] Molecules
Zhike Liu, Min Wu, Kunpeng Guo, Zhaoxiang Han, Juan Li, Ruqin Zhang, Zhongqiang Wang, Xia Tian, Xiaoqing Lu
Two spiroannulated molecular structures with dithiafulvenyl units functionalized at the 2,2′,7,7′- (SFX-DTF1) and 2,3′,6,′7- (SFX-DTF2) positions of a spiro[fluorene-9,9′-xanthene] core were synthesized. Studies revealed the hole mobility was significantly influenced by the dithiafulvenyl functionalized positions in the molecular structure. To explore their primary applications as hole-transporting materials in perovskite solar cells, SFX-DTF1-based devices exhibited a power conversion efficiency of 10.67% without the use of p-type dopants, yielding good air stability.

Publisher URL: http://dx.doi.org/10.1021/acs.orglett.7b03918

DOI: 10.1021/acs.orglett.7b03918

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