Photoluminescence from PbS quantum dots and PbS/CdS core/shell quantum dots mixed with As2S3 glass

Cao, Thanh Ha; Heo, Jong; Kwon, Youngmee; Jeong, Sanghwa; Kim, Sungjee

doi:10.1016/j.jnoncrysol.2015.05.006

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…However, PbS nanocrystals suffer from low stability, abundant surface trap states, and fast charge carrier recombination. ,,,− Various strategies are applied to overcome the drawbacks of semiconductor photocatalysis, such as plasmonics, doping, Z-scheme system, heterojunction, and so on. For instance, PbS–CdS core–shell nanocrystals have been synthesized by cation exchange to improve the rate of electron transport, thereby increasing the incident photon-to-current conversion efficiency. ,,− Moreover, PbS is a p-type semiconductor and CdS is an n-type semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Photocatalytic Activity of Au-Capped CdS–PbS Heterooctahedrons by Morphology Control

Chen

Ding

et al. 2020

J. Phys. Chem. C

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We report the preparation of Au-capped CdS–PbS heterooctahedrons of Au@CdS–PbS with controlled morphology for enhanced photocatalytic H2 generation. Au@CdS–PbS heteronanostructures possess three advantages: (1) CdS–PbS octahedrons form a p-n heterojunction with built-in field for efficient separation of photoexcited charge carriers. (2) Au nanocups exhibit strong light-harvesting capability in broadband spectrum across the visible and near-infrared region induced by the electric quadrupole and magnetic dipole plasmon modes. (3) Due to the higher permittivity of PbS compared with CdS, the intense scattering of PbS dielectric antenna and large local field of Au plasmonic antenna could both lead to the enhanced optical absorption and generation of e/h pairs. By optimizing the morphology of Au@CdS–PbS, the largest normalized photocatalytic H2 generation rate of 400.6 μmol/g/h is obtained, which is 6.33 times that of the sum of pure CdS–PbS and standalone Au nanocups. This study provides the essential advantages of p–n heterojunction as well as magnetic plasmon resonance and dielectric antenna effect for the application of highly efficient photocatalysis.

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Section: Introductionmentioning

confidence: 99%

Enhancing Photocatalytic Activity of Au-Capped CdS–PbS Heterooctahedrons by Morphology Control

Chen

Ding

et al. 2020

J. Phys. Chem. C

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Highly Luminescent Cesium Lead Halide Perovskite Nanocrystals Stabilized in Glasses for Light‐Emitting Applications

Zhang

Zhao

et al. 2019

Advanced Optical Materials

236

135

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Cesium lead halide (CsPbX3) nanocrystals have great potential for photovoltaic and optoelectronic applications, but they are sensitive to oxygen, moisture, and light irradiation. Embedding these CsPbX3 nanocrystals into all‐inorganic amorphous solid matrices such as glass is expected to improve their stability. In this work, CsPbX3 nanocrystals are precipitated in boro‐germanate glasses with tunable composition, absorption, and photoluminescence. Quantum efficiency of CsPbBr3 nanocrystals in glass can be as high as ≈80% and ≈20% for CsPb(Cl/Br)3 and CsPb(Br/I)3 nanocrystals, respectively. Thermo‐ and photostabilities of CsPbX3 nanocrystals in glass are greatly improved due to the inert nature of glasses, and intense laser irradiation‐induced damage to CsPbX3 nanocrystals is recoverable through thermal annealing. With CsPbBr3 nanocrystal‐embedded glass slices, a green light‐emitting device with a luminous efficiency of ≈120 lm W−1 and an external quantum yield of ≈30% is achieved. A white‐light‐emitting device consisting of CsPbBr3 nanocrystals and CsPb(Br/I)3 nanocrystal–embedded glass slices shows luminous efficiency in the range of 50–60 lm W−1 and external quantum yield of 20–25%. The thermo‐ and photostabilities along with the chemical stability of CsPbX3 nanocrystal–embedded glasses are promising materials for photoluminescence related applications.

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Recent Developments in Near-Infrared-II Luminescence Imaging Using Inorganic Nanoparticles: Semiconductor Quantum Dots and Lanthanide Nanoparticles

Kim,

Yu,

Lee

et al. 2024

Korean J. Chem. Eng.

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Photoluminescence from PbS quantum dots and PbS/CdS core/shell quantum dots mixed with As2S3 glass

Cited by 4 publications

References 14 publications

Enhancing Photocatalytic Activity of Au-Capped CdS–PbS Heterooctahedrons by Morphology Control

Enhancing Photocatalytic Activity of Au-Capped CdS–PbS Heterooctahedrons by Morphology Control

Highly Luminescent Cesium Lead Halide Perovskite Nanocrystals Stabilized in Glasses for Light‐Emitting Applications

Recent Developments in Near-Infrared-II Luminescence Imaging Using Inorganic Nanoparticles: Semiconductor Quantum Dots and Lanthanide Nanoparticles

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