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Terpyridine-zinc(II) coordination nanosheets as modulators of perovskite crystallization to enhance solar cell efficiency.
- Source :
- Journal of Materials Chemistry A; 4/7/2023, Vol. 11 Issue 13, p7077-7084, 8p
- Publication Year :
- 2023
-
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<subscript>2</subscript>-based perovskite crystallization and thus the efficiency of PSCs. Ultrasonically fragmented ZnTPY CONASHs, rich in uncoordinated terpyridine moieties, caused multidentate chelation with PbI<subscript>2</subscript>, resulting in a well-dispersed ZnTPY:PbI<subscript>2</subscript> complex. This metal-organic complex could act as a heterogeneous nucleation seed and facilitate the formation of a PbI<subscript>2</subscript>-to-[PbI<subscript>6−x</subscript>]<superscript>4−</superscript> coordinated octahedral framework in a precursor solution of perovskite, thereby reducing the crystallization barrier of tetragonal CH<subscript>3</subscript>NH<subscript>3</subscript>PbI<subscript>3</subscript> 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<subscript>2</subscript> in a solution with CONASHs for enhancing the PbI<subscript>2</subscript>-to-perovskite conversion. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 11
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 162800832
- Full Text :
- https://doi.org/10.1039/d3ta00505d