Facilely Synthesized spiro[fluorene-9,9?-phenanthren-10?-one] in Donor–Acceptor–Donor Hole-Transporting Materials for Perovskite Solar Cells
Journal
ChemSusChem
Journal Volume
11
Journal Issue
18
Pages
3225-3233
Date Issued
2018
Author(s)
Abstract
AbstractWe have demonstrated two novel donor–acceptor–donor (D–A–D) hole‐transport material (HTM) with spiro[fluorene‐9,9′‐phenanthren‐10′‐one] as the core structure, which can be synthesized through a low‐cost process in high yield. Compared to the incorporation of the conventional HTM of commonly used 2,2′,7,7′‐tetrakis[N,N‐di(4‐methoxyphenyl)amino]‐9,9′‐spirobifluorene (Spiro‐OMeTAD), the synthesis process is greatly simplified for the presented D–A–D materials, including a minimum number of purification processes. This results in an increased production yield (>55 %) and suppressed production cost (<30 $ g−1), in addition to high power conversion efficiency (PCE) in perovskite solar cells (PSCs). The PCE of a PSC using our D–A–D HTM reaches 16.06 %, similar to that of Spiro‐OMeTAD (16.08 %), which is attributed to comparable hole mobility and charge‐transfer efficiency. D–A–D HTMs also provide better moisture resistivity to prolong the lifetime of PSCs under ambient conditions relative to their Spiro‐OMeTAD counterparts. The proposed new type of D–A–D HTM has shown promising performance as an alternative HTM for PSCs and can be synthesized with high production throughput.
SDGs
Publisher
Wiley-VCH Verlag
Type
journal article