Rapid synthesis and mechanochemical reactions of cesium copper halides for convenient chromaticity tuning and efficient white light emission

Fang, Shaofan; Wang, Ye; Li, Huixia; Fang, Feng; Jiang, Ke; Liu, Zexiang; Li, Henan; Shi, Yumeng

doi:10.1039/d0tc00015a

Cited by 54 publications

(56 citation statements)

References 44 publications

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“…According to the former reports, the Cu-based LFMHPs with different chemical structure formulas could emit different colors. As reported by Fang et al, 42 the Cu-based LFMHPs of Cs 3 Cu 2 I 5 (with a blue emission at 445 nm) and CsCu 2 I 3 (with a yellow emission at 575 nm) were synthesized by a rapid antisolvent crystallization process, and the two compounds could be interconverted through mechanochemical reactions. Therefore, the standard white light could be obtained by simply mixing the products of Cs 3 Cu 2 I 5 and CsCu 2 I 3 .…”

Section: Cu-based Lfmhpsmentioning

confidence: 94%

“…Reproduced with permission: Copyright 2020, Royal Society of Chemistry. 42 C, Schematic exhibition of the reaction process for bright Cs 3 Bi 2 Br 9 QDs with an all-around improvement strategy. Reproduced with permission: Copyright 2019, American Chemical Society.…”

Section: Hot-injection Methodsmentioning

confidence: 99%

“…Concerning the diversity of LFMHPs, lots of strategies have already been explored to prepare the LFMHPs with different structures. [41][42][43][44][45] Generally, the structures of MHPs could be classified into 0 dimensional (0D), 1D, 2D, and 3D according to the array of atoms, and according to the different morphologies and formations, they could also be sorted into films, crystals, powders, and quantum dots (QDs). 25 The preparation strategies always take a significant influence on the structures and characteristics of LFMHPs, which decides whether the LFMHPs are suitable to be emitting layers in the Pero-LEDs or not.…”

Section: The Strategies For Lfmhps Preparationmentioning

confidence: 99%

“…Concerning the diversity of LFMHPs, lots of strategies have already been explored to prepare the LFMHPs with different structures 41‐45 . Generally, the structures of MHPs could be classified into 0 dimensional (0D), 1D, 2D, and 3D according to the array of atoms, and according to the different morphologies and formations, they could also be sorted into films, crystals, powders, and quantum dots (QDs) 25 .…”

Section: The Strategies For Lfmhps Preparationmentioning

confidence: 99%

See 3 more Smart Citations

Lead‐free metal halide perovskites for light‐emitting diodes

Yan

Feng

et al. 2021

EcoMat

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Metal halide perovskites (MHPs) have been developing rapidly in recent years due to their outstanding optoelectronic properties and tremendous contributions from worldwide researchers. The external quantum efficiencies of perovskite light-emitting diodes (Pero-LEDs) have all exceeded 20% for the green, red, and near-infrared emitting ones. However, the toxicity and instability issues of the lead-based MHPs are still big problems limiting their practical applications. The applications of the lead-free MHPs (LFMHPs) are emerging as one of the most promising strategies to tackle these issues. Compared with lead-based MHPs, the LFMHPs show better environment stability and broader emission regions from the violet to near-infrared wavelength. Thanks to numerous contributions made by the researchers, great progress has already been made for the LFMHPs. For example, the photoluminescence quantum yield has reached near 100%. However, the performances of the lead-free Pero-LEDs are still lagging compared with their lead-based counterparts. In this review, we comprehensively summarize the synthesis developments of LFMHPs and their applications in the down-conversion white LEDs and electroluminescent Pero-LEDs. Moreover, some suggestions and outlooks of the lead-free Pero-LEDs developments are proposed in the end.

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Section: Cu-based Lfmhpsmentioning

confidence: 94%

Section: Hot-injection Methodsmentioning

confidence: 99%

Section: The Strategies For Lfmhps Preparationmentioning

confidence: 99%

Section: The Strategies For Lfmhps Preparationmentioning

confidence: 99%

See 2 more Smart Citations

Lead‐free metal halide perovskites for light‐emitting diodes

Yan

Feng

et al. 2021

EcoMat

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show abstract

“…It is necessary to develop a general design principle to grow high‐quality defect‐free crystal with controlled dimensionality. To date, most of the synthesis techniques of 1D metal halide materials are based on solution process, such as antisolvent vapor‐assisted crystallization, [ 29,68 ] rapid antisolvent crystallization, [ 82,84 ] inverse‐temperature crystallization, [ 85 ] temperature‐lowering crystallization, [ 26,70,86 ] and solvent evaporation crystallization. [ 23,50,51,87 ] Therefore, it is necessary to develop other synthetic routes besides solution process.…”

Section: Summary and Future Perspectivesmentioning

confidence: 99%

One‐Dimensional Molecular Metal Halide Materials: Structures, Properties, and Applications

Rahaman

Lin

et al. 2021

Small Structures

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Metal halides with low‐dimensional molecular structures are the rising stars in the horizon of functional materials research. Among them, 1D metal halide hybrids are very promising for future optoelectronic applications because of their unusual photophysical properties resulting from strong quantum confinement. In the past few years, besides lead‐based 1D metal halide hybrids, research has been extended to lead‐free organic and all‐inorganic metal halides. Due to near‐unity photoluminescence quantum yield and excellent structural stability, all‐inorganic 1D metal halides are suitable for environmentally friendly optoelectronic devices. Moreover, the distortion and connectivity mode of metal halide octahedra arouse the formation of self‐trapped excitons within 1D metal halides, thus endowing the materials with distinct optical properties. Recent investigations have revealed many exciting characteristics of this new class of materials, such as ferroelectricity, ferromagnetism, optical cooling, and so on. This perspective presents not only structure–property correlations and recent applications of 1D metal halides but also the existing challenges and future research directions.

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Multimodal Gas Sensor Detecting Hydroxyl Groups with Phase Transition Based on Eco‐Friendly Lead‐Free Metal Halides

Lee

Kim

et al. 2022

Adv Funct Materials

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An electrical and optical responsive chemical-semiconductor gas sensor is developed using Cu(I) halides with a phase transition mechanism. Cu(I) materials exhibit reversible phase transitions between the Cs 3 Cu 2 I 5 and CsCu 2 I 3 with different properties, owing to the formation/destruction of the Cs-I and Cu-Cu bonding when the hydroxyl groups are attached/detached. Among various toxic and atmospheric gases, a Cu(I)-based gas sensor has high selectivity in detecting the hydroxyl group, and the highest sensitivity to water. The reactivity is determined by the polarity, where water with the largest polarity has the strongest attraction for Cu + and I − ions, letting phase transition occur easily. The multimodal sensor red-shifts emission from 445 to 575 nm when it detects hydroxyl gas, and the moisture-sensitive sensor visually confirms response to breaths in less than 5 s and recovery in the air in less than 30 s. The gas sensor can operate at room temperature while applying a constant bias voltage of 1 V, and it also shows excellent sensitivity in a relative humidity range of 15-75%. Furthermore, the sensor maintained ≈90% of its initial responsivity over 1 year.

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Rapid synthesis and mechanochemical reactions of cesium copper halides for convenient chromaticity tuning and efficient white light emission

Abstract: Emitting wavelength of cesium copper halides can be effectively tuned by regulating the process of mechanochemical reaction firstly.

Cited by 54 publications

References 44 publications

Lead‐free metal halide perovskites for light‐emitting diodes

Lead‐free metal halide perovskites for light‐emitting diodes

One‐Dimensional Molecular Metal Halide Materials: Structures, Properties, and Applications

Multimodal Gas Sensor Detecting Hydroxyl Groups with Phase Transition Based on Eco‐Friendly Lead‐Free Metal Halides

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