AI Article Synopsis
- Lead halide perovskite nanowires (NWs) are promising due to their unique features like efficient carrier transport and polarized light emission, but their instability poses challenges for practical use.
- Researchers successfully synthesized heterostructured CsPbBr/PbSe NWs, measuring 10 nm in diameter, which emitted green fluorescence with a strong quantum yield of 37.6%.
- These NWs showed impressive stability in water and air over several months, paving the way for their potential use in optoelectronic devices.
Article Abstract
Lead halide perovskite nanowires (NWs) have garnered increasing attention owing to their unique properties, including axial carrier transportation, low pumping thresholds, and polarized emission. However, their intrinsic instability significantly limits their applications. In this study, heterostructured CsPbBr/PbSe NWs with a diameter of 10 nm and lengths ranging from several to tens of microns were successfully synthesized a one-pot solution-phase process. Photoluminescence measurements revealed that the CsPbBr/PbSe NWs emitted green fluorescence with a narrow width of 16 nm and a high photoluminescence quantum yield (PLQY) of 37.6%. The obtained CsPbBr/PbSe NWs underwent anion exchange with I ion precursors to transform into CsPbBrI/PbSe, but not with Cl ion precursors. Remarkably, these heterostructured CsPbBr/PbSe NWs remained stable when immersed in water or exposed to air for several months, demonstrating excellent humidity stability. This study offers an effective approach for preparing stable CsPbBr NWs and fosters their future applications in optoelectronic devices.
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| http://dx.doi.org/10.1039/d4nr03554b | DOI Listing |
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