Exciton engineering of 2D Ruddlesden-Popper perovskites by synergistically tuning the intra and interlayer structures.

Autor: Guo S; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Mihalyi-Koch W; Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA., Mao Y; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Li X; Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China., Bu K; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Hong H; Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China., Hautzinger MP; Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA., Luo H; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Wang D; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Gu J; Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China., Zhang Y; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Zhang D; Hawaii Institute of Geophysics & Planetology, University of Hawaii Manoa, Honolulu, HI, USA., Hu Q; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Ding Y; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Yang W; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China., Fu Y; Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China. yfu@pku.edu.cn., Jin S; Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA. jin@chem.wisc.edu., Lü X; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China. xujie.lu@hpstar.ac.cn.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Apr 08; Vol. 15 (1), pp. 3001. Date of Electronic Publication: 2024 Apr 08.
DOI: 10.1038/s41467-024-47225-4
Abstrakt: Designing two-dimensional halide perovskites for high-performance optoelectronic applications requires deep understanding of the structure-property relationship that governs their excitonic behaviors. However, a design framework that considers both intra and interlayer structures modified by the A-site and spacer cations, respectively, has not been developed. Here, we use pressure to synergistically tune the intra and interlayer structures and uncover the structural modulations that result in improved optoelectronic performance. Under applied pressure, (BA) 2 (GA)Pb 2 I 7 exhibits a 72-fold boost of photoluminescence and 10-fold increase of photoconductivity. Based on the observed structural change, we introduce a structural descriptor χ that describes both the intra and interlayer characteristics and establish a general quantitative relationship between χ and photoluminescence quantum yield: smaller χ correlates with minimized trapped excitons and more efficient emission from free excitons. Building on this principle, we design a perovskite (CMA) 2 (FA)Pb 2 I 7 that exhibits a small χ and an impressive photoluminescence quantum yield of 59.3%.
(© 2024. The Author(s).)
Databáze: MEDLINE
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