Inorganic frameworks of low-dimensional perovskites dictate the performance and stability of mixed-dimensional perovskite solar cells.

Autor:	Febriansyah B; Berkeley Educational Alliance for Research in Singapore (BEARS), Ltd., 1 CREATE Way, Singapore, 138602, Singapore. jwager@berkeley.edu.; Energy Research Institute at Nanyang Technological University (ERI@N), 50 Nanyang Drive, Singapore, 637553, Singapore. nripan@ntu.edu.sg., Li Y; Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore., Giovanni D; Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore., Salim T; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore., Hooper TJN; Centre of High Field Nuclear Magnetic Resonance (NMR) Spectroscopy and Imaging, Nanyang Technological University21 Nanyang Link, Singapore, 637371, Singapore., Sim Y; Energy Research Institute at Nanyang Technological University (ERI@N), 50 Nanyang Drive, Singapore, 637553, Singapore. nripan@ntu.edu.sg.; Singapore-CEA Alliance for Research in Circular Economy (SCARCE), Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore., Ma D; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore., Laxmi S; Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore., Lekina Y; Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore., Koh TM; Energy Research Institute at Nanyang Technological University (ERI@N), 50 Nanyang Drive, Singapore, 637553, Singapore. nripan@ntu.edu.sg., Shen ZX; Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore., Pullarkat SA; Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore., Sum TC; Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore., Mhaisalkar SG; Energy Research Institute at Nanyang Technological University (ERI@N), 50 Nanyang Drive, Singapore, 637553, Singapore. nripan@ntu.edu.sg.; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore., Ager JW; Berkeley Educational Alliance for Research in Singapore (BEARS), Ltd., 1 CREATE Way, Singapore, 138602, Singapore. jwager@berkeley.edu.; Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, California, 94720, USA., Mathews N; Energy Research Institute at Nanyang Technological University (ERI@N), 50 Nanyang Drive, Singapore, 637553, Singapore. nripan@ntu.edu.sg.; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.; Singapore-CEA Alliance for Research in Circular Economy (SCARCE), Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
Jazyk:	angličtina
Zdroj:	Materials horizons [Mater Horiz] 2023 Feb 06; Vol. 10 (2), pp. 536-546. Date of Electronic Publication: 2023 Feb 06.
DOI:	10.1039/d2mh00868h
Abstrakt:	Mixed-dimensional perovskites containing mixtures of organic cations hold great promise to deliver highly stable and efficient solar cells. However, although a plethora of relatively bulky organic cations have been reported for such purposes, a fundamental understanding of the materials' structure, composition, and phase, along with their correlated effects on the corresponding optoelectronic properties and degradation mechanism remains elusive. Herein, we systematically engineer the structures of bulky organic cations to template low-dimensional perovskites with contrasting inorganic framework dimensionality, connectivity, and coordination deformation. By combining X-ray single-crystal structural analysis with depth-profiling XPS, solid-state NMR, and femtosecond transient absorption, it is revealed that not all low-dimensional species work equally well as dopants. Instead, it was found that inorganic architectures with lesser structural distortion tend to yield less disordered energetic and defect landscapes in the resulting mixed-dimensional perovskites, augmented in materials with a longer photoluminescence (PL) lifetime, higher PL quantum yield (up to 11%), improved solar cell performance and enhanced thermal stability ( T 80 up to 1000 h, unencapsulated). Our study highlights the importance of designing templating organic cations that yield low-dimensional materials with much less structural distortion profiles to be used as additives in stable and efficient perovskite solar cells.
Databáze:	MEDLINE
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