Abstract
Two novel dopant-free hole-transport materials (HTMs) with spiro[dibenzo[c,h]xanthene-7,9′-fluorene] (SDBXF) skeletons were prepared via facile synthesis routes. A power conversion efficiency of 15.9% in perovskite solar cells is attained by using one HTM without dopants, which is much higher than undoped Spiro-OMeTAD-based devices (10.8%). The crystal structures of both new HTMs were systematically investigated to reveal the reasons behind such differences in performance and to indicate the design principles of more advanced HTMs.
Original language | English |
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Pages (from-to) | 9571-9574 |
Number of pages | 4 |
Journal | Chemical Communications |
Volume | 54 |
Issue number | 69 |
DOIs | |
Publication status | Published - 7 Sep 2018 |