Ultrastable CsPbBr3@CsPb2Br5@TiO2 Composites for Photocatalytic and White Light-Emitting Diodes DOI
Chen Zhang, Zeyu Wang,

Minqiang Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(29), P. 35216 - 35226

Published: July 16, 2023

Although cesium halide lead (CsPbX3, X = Cl, Br, I) perovskite quantum dots (QDs) have excellent photovoltaic properties, their unstable characteristics are major limitations to application. Previous research has demonstrated that the core-shell structure can significantly improve stability of CsPbX3 QDs and form heterojunctions at interfaces, enabling multifunctionalization materials. In this article, we propose a convenient method construct core-shell-structured materials, in which CsPbBr3@CsPb2Br5 micrometer crystals be prepared by controlling ratio Cs+/Pb2+ precursor reaction time. The materials exhibited enhanced optical properties provided for further postprocessing. Subsequently, CsPbBr3@CsPb2Br5@TiO2 composites were obtained coating layer dense TiO2 nanoparticles on surfaces through hydrolysis titanium precursors. According density functional theory (DFT) calculations experimental results, presence surface promoted delocalization photogenerated electrons holes, exhibit performance field photocatalysis. addition, due passivation defects CsPb2Br5 shells, luminous intensity white light-emitting diodes with only decayed 2%-3% high temperatures (>100 °C) when working 24 h.

Language: Английский

A Solution‐Processed All‐Perovskite Memory with Dual‐Band Light Response and Tri‐Mode Operation DOI
Xinwei Guan, Tao Wan, Long Hu

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(16)

Published: Jan. 5, 2022

Abstract Integrating multiple semiconductors with distinct physical properties is a practical design strategy for realizing novel optoelectronic devices unprecedented functionalities. In this work, photonic resistive switching (RS) memory demonstrated based on solution‐processed bilayers of strontium titanate (SrTiO 3 or STO) quantum dots (QDs) and all‐inorganic halide perovskite CsPbBr (CPB) an Ag/STO/CPB/Au architecture. Compared the single‐layer STO CPB RS device, double‐layer device shows considerably improved performance high ratio over 10 5 , endurance 3000 cycles, retention time longer than 2 × 4 s. The formation heterojunction between significantly enhances resistance state, separation active silver electrode layer contributes to long‐term stability. More importantly, exhibits UV–visible dual‐band response due photogating effect light‐induced modification barrier. Last, tri‐mode operation, i.e., photodetector, memory, photomemory, via tailoring light electric stimuli. This bilayer architecture provides unique approach toward enhancing photoresponsive data‐storage devices.

Language: Английский

Citations

46
Quantum Dots Compete at the Acme of MXene Family for the Optimal Catalysis DOI Creative Commons
Yuhua Liu, Wei Zhang, Weitao Zheng

et al.

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: Aug. 2, 2022

It is well known that two-dimensional (2D) MXene-derived quantum dots (MQDs) inherit the excellent physicochemical properties of parental MXenes, as a Chinese proverb says, "Indigo blue extracted from indigo plant, but bluer than plant it comes from." Therefore, 0D QDs harvest larger surface-to-volume ratio, outstanding optical properties, and vigorous confinement effect. Currently, MQDs trigger enormous research enthusiasm an emerging star functional materials applied to physics, chemistry, biology, energy conversion, storage. Since surface small-sized include type groups, functionalized directly determines their performance. As Nobel Laureate Wolfgang Pauli "God made bulk, was invented by devil," just on basis abundant there lots space be thereof excavated MQDs. We are witnessing such excellence even more promising expected. Nowadays, have been widely catalysis, whereas related reviews rarely reported. Herein, we provide state-of-the-art overview in catalysis over past five years, ranging origin development MQDs, synthetic routes advanced characterization techniques. To explore diversity catalytic application perspectives our review will stimulate efforts toward synthesis optimal designing high-performance MQDs-based catalysts.

Language: Английский

Citations

43
Exploring the multifunctional roles of quantum dots for unlocking the future of biology and medicine DOI
Muhammad Kashif Ali, Saher Javaid,

Haseeb Afzal

et al.

Environmental Research, Journal Year: 2023, Volume and Issue: 232, P. 116290 - 116290

Published: June 7, 2023

Language: Английский

Citations

33
Emerging trends of carbon nitrides and their hybrids for photo-/electro-chemical energy applications DOI

Mohammed Fawaz,

Rohan Bahadur, Nithinraj Panangattu Dharmarajan

et al.

Carbon, Journal Year: 2023, Volume and Issue: 214, P. 118345 - 118345

Published: Aug. 7, 2023

Language: Английский

Citations

28
Stability Challenges for a Highly Efficient Perovskite/Silicon Tandem Solar Cell: A Review DOI

Syed Azkar Ul Hasan,

Muhammad Aleem Zahid, Sangheon Park

et al.

Solar RRL, Journal Year: 2024, Volume and Issue: 8(6)

Published: Feb. 24, 2024

As the balance of system cost photovoltaic (PV) installations governs competitiveness PV device market, next‐generation solar cells desire substantially enhanced power conversion efficiencies (PCEs). The single‐junction perovskite and Si have demonstrated PCEs beyond 26% 25%, respectively. tandem configuration has crossed threshold posed by shockley queisser limit demonstrating 33.9% PCE. However, unresolved issues in community from a stability perspective pose challenges for realizing highly efficient stable perovskite–Si (TSCs). This review highlights current status TSC besides elucidating degradation mechanisms at cell module level. A needs optimization keeping view specific requirements like strain, matching, bandgap between top bottom subcell. Various stressors affecting efficiency module, namely, reverse bias hot spot formation, delamination, highlight valuable insight to develop future strategies TSC. Stability regimes can provide essential stepping stone but, modified are inevitable.

Language: Английский

Citations

14
Ligand-controlled electrochemiluminescence generation from CdSe/CdS/ZnS core/shell/shell quantum dots DOI
Hui Sun,

Zhiyuan Cao,

Haiyan Qin

et al.

Nano Research, Journal Year: 2024, Volume and Issue: 17(8), P. 7776 - 7785

Published: June 4, 2024

Language: Английский

Citations

10
Quantum Dot Nanomaterials: Empowering Advances in Optoelectronic Devices DOI Creative Commons

Mariam Akter Mimona,

Md Israfil Hossain Rimon,

Fatema Tuz Zohura

et al.

Chemical Engineering Journal Advances, Journal Year: 2025, Volume and Issue: unknown, P. 100704 - 100704

Published: Jan. 1, 2025

Language: Английский

Citations

1
Synergistic Improvement of Narrow Bandgap PbS Quantum Dot Solar Cells through Surface Ligand Engineering, Near-Infrared Spectral Matching, and Enhanced Electrode Transparency DOI
Anjali Sharma, Dipak Dattatray Shinde, Chandan Mahajan

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

The tunability of the energy bandgap in near-infrared (NIR) range uniquely positions colloidal lead sulfide (PbS) quantum dots (QDs) as a versatile material to enhance performance existing perovskite and silicon solar cells tandem architectures. desired narrow (NBG) PbS QDs exhibit polar (111) nonpolar (100) terminal facets, making effective surface passivation through ligand engineering highly challenging. Despite recent breakthroughs engineering, NBG suffer from uncontrolled agglomeration solid films, leading increased disorder trap formation. limited NIR transparency commonly used indium-doped tin oxide (ITO) electrodes inadequate radiation commercially available simulators further compromise true cells. Here, we employ hybrid strategy based on inorganic cadmium halide organic thiol molecules, partial substitution Pb atoms with Cd heteroatoms. This substantially reduces undesired QD fusion improving photophysical electronic properties. By modulating thickness ITO layer managing refraction loss ZnO coating, improved above 80%. We combine an light source simulator achieve near-ideal spectral matching for broader standard AM1.5G illumination. Enhancements QDs, improvements electrodes, matched setup help us cell power conversion efficiencies 12.4%, 4.48%, 1.37% under AM 1.5G, filter, filter illuminations, respectively. A record open-circuit voltage (Voc) 0.54 V short-circuit current density (Jsc) 38.5 mA/cm2 are achieved 1.5G attribute these advancements photovoltaic parameters reduction Urbach tail states intermediate originating superior QDs.

Language: Английский

Citations

1
Stability of photoelectrochemical cells based on colloidal quantum dots DOI
Kanghong Wang, Tao Yi,

Zikun Tang

et al.

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review gives systematic analysis of degradation reasons QD-based PEC cell and strategies improving stability from aspects including band structure, shapes, ligands QDs, QDs’ matrix, co-catalysts, encapsulation counter-electrodes.

Language: Английский

Citations

1
Carrier Dynamics in Alloyed Chalcogenide Quantum Dots and Their Light‐Emitting Devices DOI
Zhaohan Li, Jing Wei, Fangfang Wang

et al.

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(40)

Published: Sept. 15, 2021

Abstract Light‐emitting devices based on alloyed quantum dots have reached external efficiencies above 20% in red, green, and blue emission devices. Their outstanding performances including high efficiency, long‐term device stability, suppressed efficiency roll‐off identify alloyed‐quantum‐dot light‐emitting as good candidates for next generation solid‐state lightings displays. All these advantages stem from the chemical composition gradient of radial direction. The enables lattice strain to be released gradually, eventually decreasing interface defects suppressing Auger recombination. Carrier dynamics play a crucial role fundamental properties functionalities A more in‐depth understanding carrier is therefore both technological significance. This review article provides an overview recent advances study Particular emphasis placed relationship between recombination optical optoelectronic properties. expected encourage further research related stimulate new synthesis efforts produce stable with improved control dynamics.

Language: Английский

Citations

49