Carbazole-Based
Spiro[fluorene-9,9′-xanthene]
as an Efficient Hole-Transporting Material for Perovskite Solar Cells
Posted on 2020-06-12 - 18:33
For
the practical application of perovskite solar cells (PSC),
it is desirable to have high efficiency, long-term stability, and
low manufacturing cost. Therefore, it is required to develop inexpensive
and well-performing hole-transporting materials (HTMs). In this study,
we synthesized SFXDAnCBZ, which is a new carbazole-based spiro[fluorene-9,9′-xanthene]
(SFX) derivative, where the central core and end-cap units consist
of SFX and N3,N6-bis(di-4-anisylamino)-9H-carbazole (DAnCBZ), respectively, as an efficient and
low-cost HTM for PSCs. Photoluminescence quenching at the SFXDAnCBZ/perovskite
interface was more effective than at the perovskite/Spiro-OMeTAD (2,2′,7,7′-tetrakis-(N,N-di-p-methoxy-phenyl-amine)
9,9′spiro-bifluorene) interface. We fabricated a PSC with a
power conversion efficiency (PCE) of 20.87% under 1 sun illumination
(100 mW cm–2) using SFXDAnCBZ as an HTM. This value
is comparable to that measured for the benchmark Spiro-OMeTAD. Thus,
this result confirms that SFX core-based materials can be a new kind
of HTMs for high-efficiency and low-cost PSCs.
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Lee, Do Yoon; Sivakumar, Gangala; Manju; Misra, Rajneesh; Seok, Sang Il (2020). Carbazole-Based
Spiro[fluorene-9,9′-xanthene]
as an Efficient Hole-Transporting Material for Perovskite Solar Cells. ACS Publications. Collection. https://doi.org/10.1021/acsami.0c06318