In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 13 ( 2023), p. 7077-7084
Abstract:
The high efficiency of precursor-to-perovskite conversion is one of the core factors in boosting the performance of perovskite solar cells (PSCs). Herein, we report a liquid/liquid interfacial synthesis of terpyridine-zinc( ii ) (ZnTPY) coordination nanosheets (CONASHs), which can enhance PbI 2 -based perovskite crystallization and thus the efficiency of PSCs. Ultrasonically fragmented ZnTPY CONASHs, rich in uncoordinated terpyridine moieties, caused multidentate chelation with PbI 2 , resulting in a well-dispersed ZnTPY:PbI 2 complex. This metal-organic complex could act as a heterogeneous nucleation seed and facilitate the formation of a PbI 2 -to-[PbI 6− x ] 4− coordinated octahedral framework in a precursor solution of perovskite, thereby reducing the crystallization barrier of tetragonal CH 3 NH 3 PbI 3 perovskites and achieving a complete precursor-to-perovskite conversion. Consequently, ZnTPY-capped perovskite crystals had a long photoluminescence (PL) lifetime, which is attributed to the more passivated trap states associated with ZnTPY. The corresponding PSCs exhibited an optimal power conversion efficiency of 19.8% compared with 17.9% of the controlled device. The results prove that the performance of PSC families can be improved by dispersing PbI 2 in a solution with CONASHs for enhancing the PbI 2 -to-perovskite conversion.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702232-8
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