{"title":"具有斯托克斯位移光致发光的超薄双掺杂Cs2AgxNa1-xInCl6双钙钛矿纳米片。","authors":"Qi Liang, Xue Yong, Stefano Toso, Baowei Zhang*, Liberato Manna* and Siyu Lu*, ","doi":"10.1021/acs.nanolett.5c02965","DOIUrl":null,"url":null,"abstract":"<p >We report the synthesis of ultrathin Bi-doped Cs<sub>2</sub>Ag<sub>0.5</sub>Na<sub>0.5</sub>InCl<sub>6</sub> nanoplatelets (NPLs) through control of the ligand and metal carboxylate concentrations. These ultrathin NPLs, with thickness down to 2.8 nm, exhibit photoluminescence with larger Stokes shift compared to previously reported double perovskite materials of similar kind, which we attribute to greater exciton binding energy and enhanced exciton–phonon coupling in NPLs when their thickness approaches the exciton Bohr diameter. The double perovskite NPLs could self-assemble into ordered structures that exhibited polarized emission with a degree of 0.49. This work establishes morphology control as an effective strategy to modulate the behavior of excitons in double perovskite nanomaterials and expands their optical functionality.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 32","pages":"12318–12325"},"PeriodicalIF":9.1000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultrathin Bi-Doped Cs2AgxNa1–xInCl6 Double Perovskite Nanoplatelets with Stokes-Shifted Photoluminescence\",\"authors\":\"Qi Liang, Xue Yong, Stefano Toso, Baowei Zhang*, Liberato Manna* and Siyu Lu*, \",\"doi\":\"10.1021/acs.nanolett.5c02965\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >We report the synthesis of ultrathin Bi-doped Cs<sub>2</sub>Ag<sub>0.5</sub>Na<sub>0.5</sub>InCl<sub>6</sub> nanoplatelets (NPLs) through control of the ligand and metal carboxylate concentrations. These ultrathin NPLs, with thickness down to 2.8 nm, exhibit photoluminescence with larger Stokes shift compared to previously reported double perovskite materials of similar kind, which we attribute to greater exciton binding energy and enhanced exciton–phonon coupling in NPLs when their thickness approaches the exciton Bohr diameter. The double perovskite NPLs could self-assemble into ordered structures that exhibited polarized emission with a degree of 0.49. This work establishes morphology control as an effective strategy to modulate the behavior of excitons in double perovskite nanomaterials and expands their optical functionality.</p>\",\"PeriodicalId\":53,\"journal\":{\"name\":\"Nano Letters\",\"volume\":\"25 32\",\"pages\":\"12318–12325\"},\"PeriodicalIF\":9.1000,\"publicationDate\":\"2025-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nano Letters\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acs.nanolett.5c02965\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.nanolett.5c02965","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Ultrathin Bi-Doped Cs2AgxNa1–xInCl6 Double Perovskite Nanoplatelets with Stokes-Shifted Photoluminescence
We report the synthesis of ultrathin Bi-doped Cs2Ag0.5Na0.5InCl6 nanoplatelets (NPLs) through control of the ligand and metal carboxylate concentrations. These ultrathin NPLs, with thickness down to 2.8 nm, exhibit photoluminescence with larger Stokes shift compared to previously reported double perovskite materials of similar kind, which we attribute to greater exciton binding energy and enhanced exciton–phonon coupling in NPLs when their thickness approaches the exciton Bohr diameter. The double perovskite NPLs could self-assemble into ordered structures that exhibited polarized emission with a degree of 0.49. This work establishes morphology control as an effective strategy to modulate the behavior of excitons in double perovskite nanomaterials and expands their optical functionality.
期刊介绍：
Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including:
- Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale
- Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies
- Modeling and simulation of synthetic, assembly, and interaction processes
- Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance
- Applications of nanoscale materials in living and environmental systems
Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.
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