{"title":"Microfluidic synthesis of hollow CsPbBr3 perovskite nanocrystals through the nanoscale Kirkendall effect","authors":"Yue Chen, Xiaoyu Zhang, Jinzhou Jiang, Gaoyu Chen, Kunhong Zhou, Xinwen Zhang, Fajing Li, Caojin Yuan, Jianchun Bao, Xiangxing Xu","doi":"10.1007/s12274-024-6786-z","DOIUrl":null,"url":null,"abstract":"<p>All inorganic metal halide perovskite nanocrystals (NCs) have attracted much attention for their outstanding optoelectronic properties, which can be tuned by the composition, surface, size and morphology in nanoscale. Herein, we report the microfluidic synthesis of hollow CsPbBr<sub>3</sub> perovskite NCs through the nanoscale Kirkendall effect. The formation mechanism of the hollow structure (Kirkendall void) controlled by the temperature, flow rate, ratios of precursors and ligands was investigated. Compared with the solid CsPbBr<sub>3</sub> NCs of the same size, the hollow CsPbBr<sub>3</sub> NCs exhibit blue shifts in ultraviolet–visible (UV–vis) absorption and photoluminescence (PL) spectra, and remarkably longer PL average lifetime (~ 98.2 ns). Quantum confinement effect, inner surface induced additional trap states and lattice strain of the hollow CsPbBr<sub>3</sub> NCs were discussed in understanding their unique optoelectronic properties. The hollow CsPbBr<sub>3</sub> NC based photodetector exhibits an outstanding negative photoconductivity (NPC) detectivity of 8.9 × 10<sup>12</sup> Jones. They also show potentials in perovskite NC based photovoltaic and light emitting diodes (LEDs).\n</p>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":null,"pages":null},"PeriodicalIF":9.5000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12274-024-6786-z","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
All inorganic metal halide perovskite nanocrystals (NCs) have attracted much attention for their outstanding optoelectronic properties, which can be tuned by the composition, surface, size and morphology in nanoscale. Herein, we report the microfluidic synthesis of hollow CsPbBr3 perovskite NCs through the nanoscale Kirkendall effect. The formation mechanism of the hollow structure (Kirkendall void) controlled by the temperature, flow rate, ratios of precursors and ligands was investigated. Compared with the solid CsPbBr3 NCs of the same size, the hollow CsPbBr3 NCs exhibit blue shifts in ultraviolet–visible (UV–vis) absorption and photoluminescence (PL) spectra, and remarkably longer PL average lifetime (~ 98.2 ns). Quantum confinement effect, inner surface induced additional trap states and lattice strain of the hollow CsPbBr3 NCs were discussed in understanding their unique optoelectronic properties. The hollow CsPbBr3 NC based photodetector exhibits an outstanding negative photoconductivity (NPC) detectivity of 8.9 × 1012 Jones. They also show potentials in perovskite NC based photovoltaic and light emitting diodes (LEDs).
期刊介绍:
Nano Research is a peer-reviewed, international and interdisciplinary research journal that focuses on all aspects of nanoscience and nanotechnology. It solicits submissions in various topical areas, from basic aspects of nanoscale materials to practical applications. The journal publishes articles on synthesis, characterization, and manipulation of nanomaterials; nanoscale physics, electrical transport, and quantum physics; scanning probe microscopy and spectroscopy; nanofluidics; nanosensors; nanoelectronics and molecular electronics; nano-optics, nano-optoelectronics, and nano-photonics; nanomagnetics; nanobiotechnology and nanomedicine; and nanoscale modeling and simulations. Nano Research offers readers a combination of authoritative and comprehensive Reviews, original cutting-edge research in Communication and Full Paper formats. The journal also prioritizes rapid review to ensure prompt publication.