Preparation of carbon quantum dots/fly ash/steel slag particle electrodes and their performance in rhodamine B removal DOI Creative Commons
Na Chang, Yongsheng Li,

Jianxiang He

и другие.

Materials Research Express, Год журнала: 2024, Номер 11(12), С. 125503 - 125503

Опубликована: Дек. 1, 2024

Abstract Fly ash and steel slag are industrial wastes, their resourceful treatment has been challenging. This study generated fly ash/steel particle electrodes (FA/SS PEs) using as raw materials. Carbon quantum dots (CQDs) fabricated from semi-coke were then loaded onto surface to produce CQDs/FA/SS PEs. The samples characterized by SEM, nitrogen adsorption, XRD, electrochemical measurements. results show that FA/SS PEs present a favorable electrocatalytic performance for rhodamine B (RhB) in the three-dimensional reaction system owing rich pore structures an active component (Fe 2 O 3 ), other metal oxides FA SS become backbone of during preparation process. CQDs could promote due defect-rich high specific area. RhB degradation rate over increased approximately 10% compared at time 60 min, it reach 100% pH 45 min process mainly involves electrochemical-Fenton PEs, act both electrode catalyst Fenton oxidation.

Язык: Английский

Homogeneously Blended Donor and Acceptor AgBiS2 Nanocrystal Inks Enable High‐Performance Eco‐Friendly Solar Cells with Enhanced Carrier Diffusion Length DOI Open Access

H. Kim,

Taiho Park, Ye‐Jin Choi

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 19, 2025

Abstract Colloidal semiconductor nanocrystals (NCs) have garnered significant attention as promising photovoltaic materials due to their tunable optoelectronic properties enabled by surface chemistry. Among them, AgBiS 2 NCs stand out an attractive candidate for solar cell applications environmentally friendly composition, high absorption coefficients, and low‐temperature processability. However, NC photovoltaics generally exhibit lower power conversion efficiency (PCE) compared other NC‐based devices, primarily numerous traps that serve recombination sites, leading a short diffusion length free carriers. To address this challenge, work develops donor acceptor blended (D/A) films. Through ligand modulation, formulates inks with suitable electrical band alignment charge separation, while ensuring they are fully miscible in the same solvent. This fabrication of high‐quality, thickness‐controllable D/A‐blended junction finds approach effectively facilitates carrier enhanced lifetime length. As result, using approach, achieves films twice thick conventional improvements current density PCE 8.26%.

Язык: Английский

Процитировано

1
Holistic Design of Charge Transfer Layers for Highly Efficient and Stable AgBiS2 Quantum Dot Photodetectors DOI

Jiahua Kong,

Zhonglin Du,

Yixiao Huang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 23, 2025

Abstract Developing highly efficient and stable photodetectors based on eco‐friendly AgBiS 2 quantum dots (QDs) has garnered significant attention. However, optimizing charge transfer layers (CTLs) to enhance device performance stability remains a critical challenge. Here, the study presents development of efficient, stable, fully inorganic, self‐powered QD‐based through holistic design CTLs, consisting zinc‐copper‐indium‐sulfide QDs blended with black phosphorus nanosheets as hole‐transport layers, unzipped carbon nanotubes doped ZnO nanoparticles electron‐transport layers. The rationally designed CTLs exhibit well‐matched energy‐level alignment layer balanced mobility, resulting in robust system. optimized exhibits responsivity 20 mA/W detectivity 1.9 × 10 Jones at 1000 nm, among best for heavy metal‐free photodetectors. all‐inorganic nature devices demonstrates excellent over months air, minimal degradation performance. Furthermore, these enhanced are used light sensors receiver terminal near‐infrared optical communication This work comprehensive approach achieving superior long‐term stability.

Язык: Английский

Процитировано

0
The Temperature-Dependent Tight Binding Theory Modelling of Strain and Composition Effects on the Electronic Structure of CdSe- and ZnSe-Based Core/Shell Quantum Dots DOI Open Access

Derya Malkoç,

Hilmi Ünlü

Materials, Год журнала: 2025, Номер 18(2), С. 283 - 283

Опубликована: Янв. 10, 2025

We propose a temperature-dependent optimization procedure for the second-nearest neighbor (2NN) sp3s* tight-binding (TB) theory parameters to calculate effects of strain, structure dimensions, and alloy composition on band heterostructure spherical core/shell quantum dots (QDs). integrate thermoelastic solids with 2NN TB core shell binary/ternary CdSe/Cd(Zn)S ZnSe/Zn(Cd)S QDs at any temperature. show that optimized greatly improves prediction energy dispersion curve in vicinity L X symmetry points. further used nanocrystal bandgaps QDs. conclude provides remarkable agreement measured accurately reproduces curves electronic believe proposed makes reliable accurate modeling nanoscale devices.

Язык: Английский

Процитировано

0
Optical Gain in Eu-Doped Hybrid Nanocrystals Embedded SiO2-HfO2-ZnO Ternary Glass-Ceramic Waveguides DOI Open Access
Subhabrata Ghosh,

S. Turrell,

Maurizio Ferrari

и другие.

Spectroscopy Journal, Год журнала: 2025, Номер 3(1), С. 3 - 3

Опубликована: Янв. 18, 2025

Rare-earth doped transparent glass-ceramic waveguides are playing a very crucial role in integrated optics. We fabricated ZnO-HfO2 hybrid nanocrystals embedded with 70 SiO2–(30-x) HfO2–x ZnO (x = 0, 2, 5 and 7 mol %) ternary 1 % Eu-ions. The formation size of the evolved an increase concentration waveguides. In this context, key factors such active were optical losses transparency. A lab-built m-line experimental set-up was used for characterization On other hand, gain measurements Eu-doped performed using variable stripe length method. amplification investigated on red emission line (5D0 → 7F2) Eu-ions pumped by 532 nm laser stripe-like geometry generated cylindrical lens. Here, we report, rare-earth activated varying sizes formed increasing concentration.

Язык: Английский

Процитировано

0
Janus CsPbBr3–AgBiS2 Heteronanocrystals for High-Efficiency Photodetectors DOI
Hengwei Qiu, Yongqiang Ji, Weiyan Hu

и другие.

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Heteronanocrystals (HNCs) composed of colloidal lead halide perovskites and chalcogenides always offer unique photoelectric properties. Nevertheless, synthesizing perovskite-chalcogenide HNCs has been a tough challenge due to their completely different growth dynamics. Here, we present an effective strategy synthesize Janus CsPbBr3-AgBiS2 by in situ CsPbBr3 NCs on prepared AgBiS2 quantum dot (QDs). The as-synthesized show large range absorption characteristics from visible near-infrared (NIR) wavebands. Femtosecond transient (TA) spectroscopy reveals the transfer both electron hole AgBiS2. enhanced exciton dissociation 150 °C leads photoconductors with drastically improved responsivity (R 183.8 A W-1) specific detectivity (D* 5.0 × 1014 Jones). This work not only provides reliable method for combining ionic covalent but also great potential future practical applications, such as NC (QD) solar cell.

Язык: Английский

Процитировано

0
Vacancy-Catalyzed Cation Homogenization for High-Performance AgBiS2 Nanocrystal Solar Cells DOI
Yang Liu, Zitao Ni,

Lucheng Peng

и другие.

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 2068 - 2074

Опубликована: Апрель 2, 2025

Язык: Английский

Процитировано

0
Quantum Control of Exciton Motion in Electric Field DOI Open Access

Yingjia Li,

J. Casanova, Xi Chen

и другие.

Опубликована: Апрель 17, 2025

We studied the quantum control of classical motion a two-dimensional exciton by optimizing time-dependent electric field stripe-like gate acting on and inducing its dipole moment. propose search method that significantly reduces computational requirements while efficiently identifying optimal parameters. By leveraging this method, we can precisely manipulate exciton’s final position velocity over specified evolution time. These results be applied for fluxes populations, spatially resolved light emission in semiconducting structures.

Язык: Английский

Процитировано

0
Screening of a Fraction with Higher Amyloid β Aggregation Inhibitory Activity from a Library Containing 210 Mushroom Extracts Using a Microliter-Scale High-Throughput Screening System with Quantum Dot Imaging DOI Creative Commons

Gegentuya Huanood,

Mahadeva M. M. Swamy,

Rina Sasaki

и другие.

Foods, Год журнала: 2024, Номер 13(23), С. 3740 - 3740

Опубликована: Ноя. 22, 2024

Alzheimer's disease (AD) is a highly prevalent neurodegenerative hallmarked by amyloid plaques and neurofibrillary tangles. Amyloid are formed the β (Aβ) aggregation, so substances that inhibit this aggregation useful for preventing treating AD. Mushrooms widely used medicinal fungi with high edible nutritional value. have variety of biologically active ingredients, studies shown they certain effects in anti-bacterial, anti-oxidation, anti-inflammatory, anti-tumor, immune regulation. Previously, we developed microliter-scale high-throughput screening (MSHTS) system using quantum dot (QD) nanoprobes to screen Aβ inhibitors. In study, appraised inhibitory activity 210 natural mushrooms from Hokkaido (Japan) found 11 samples activity. We then selected

Язык: Английский

Процитировано

0
Preparation of carbon quantum dots/fly ash/steel slag particle electrodes and their performance in rhodamine B removal DOI Creative Commons
Na Chang, Yongsheng Li,

Jianxiang He

и другие.

Materials Research Express, Год журнала: 2024, Номер 11(12), С. 125503 - 125503

Опубликована: Дек. 1, 2024

Abstract Fly ash and steel slag are industrial wastes, their resourceful treatment has been challenging. This study generated fly ash/steel particle electrodes (FA/SS PEs) using as raw materials. Carbon quantum dots (CQDs) fabricated from semi-coke were then loaded onto surface to produce CQDs/FA/SS PEs. The samples characterized by SEM, nitrogen adsorption, XRD, electrochemical measurements. results show that FA/SS PEs present a favorable electrocatalytic performance for rhodamine B (RhB) in the three-dimensional reaction system owing rich pore structures an active component (Fe 2 O 3 ), other metal oxides FA SS become backbone of during preparation process. CQDs could promote due defect-rich high specific area. RhB degradation rate over increased approximately 10% compared at time 60 min, it reach 100% pH 45 min process mainly involves electrochemical-Fenton PEs, act both electrode catalyst Fenton oxidation.

Язык: Английский

Процитировано

0