The efficient green light-emitting diodes based on low-toxicity Zr-Pb alloy perovskite quantum dots passivated by inorganic ligand

Yang, Xikang; Wu, Anlang; Deng, Zhiqiang; Wu, Zhen; Zhao, Zhizhong; Hu, Ziyang

doi:10.1016/j.apmt.2022.101658

Cited by 9 publications

(6 citation statements)

References 57 publications

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“…Moreover, Yang et al synthesized improved green LEDs by using Zr−Pb doped CsPbBr 3 QDs that showed enhanced operating half-life and external quantum efficiency. 92 They have also been incorporated into solar cells as lightabsorbing materials due to their high absorption coefficients and long carrier diffusion lengths. 93 Very recently, Yang and his team prepared α-CsPbI 3 QDs for solar cell applications with a PCE of 8.28%.…”

Section: Understanding Lead-free Halide Perovskitesmentioning

confidence: 99%

Metal/Covalent Organic Framework Encapsulated Lead-Free Halide Perovskite Hybrid Nanocatalysts: Multifunctional Applications, Design, Recent Trends, Challenges, and Prospects

Altaf,

Khan,

Khan

et al. 2024

ACS Omega

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Perovskites are bringing revolutionization in a various fields due to their exceptional properties and crystalline structure. Most specifically, halide perovskites (HPs), lead-free halide perovskites (LFHPs), and halide perovskite quantum dots (HPs QDs) are becoming hotspots due to their unique optoelectronic properties, low cost, and simple processing. HPs QDs, in particular, have excellent photovoltaic and optoelectronic applications because of their tunable emission, high photoluminescence quantum yield (PLQY), effective charge separation, and low cost. However, practical applications of the HPs QDs family have some limitations such as degradation, instability, and deep trap states within the bandgap, structural inflexibility, scalability, inconsistent reproducibility, and environmental concerns, which can be covered by encapsulating HPs QDs into porous materials like metal−organic frameworks (MOFs) or covalent−organic frameworks (COFs) that offer protection, prevention of aggregation, tunable optical properties, flexibility in structure, enhanced biocompatibility, improved stability under harsh conditions, consistency in production quality, and efficient charge separation. These advantages of MOFs-COFs help HPs QDs harness their full potential for various applications. This review mainly consists of three parts. The first portion discusses the perovskites, halide perovskites, lead-free perovskites, and halide perovskite quantum dots. In the second portion, we explore MOFs and COFs. In the third portion, particular emphasis is given to a thorough evaluation of the development of HPs QDs@MOFs-COFs based materials for comprehensive investigations for next-generation materials intended for diverse technological applications, such as CO 2 conversion, pollutant degradation, hydrogen generation, batteries, gas sensing, and solar cells. Finally, this review will open a new gateway for the synthesis of perovskite-based quantum dots.

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Section: Understanding Lead-free Halide Perovskitesmentioning

confidence: 99%

Metal/Covalent Organic Framework Encapsulated Lead-Free Halide Perovskite Hybrid Nanocatalysts: Multifunctional Applications, Design, Recent Trends, Challenges, and Prospects

Altaf,

Khan,

Khan

et al. 2024

ACS Omega

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“…As one of the most promising materials, halide perovskite offers several unique charactersitics, including strong emission spectrum tunability, wide absorption spectrum, high defect tolerance, excellent photoluminescence characteristics, easy preparation and accessibility, and low cost. − Recently, they have attracted more and more interests in the field of photonics, such as light-emitting diodes, − photodetectors, , optoelectronic modulators, solar cells, − and lasers. , Notably, over the past few years, the EQE of lead halide perovskite light-emitting diode has exceeded 20% via various optimization measures, such as interface engineering, − optimization and control of the purification processes, − ligand exchange, ,, and charge balance strategy. , When quantum dots synthesized by means of the hot injection method, longer carbon chain ligands, such as oleic acid (OA) and oleylamine (OAm), are commonly employed to regulate the size of quantum dots (PeQDs) through surface adsorption, thereby mitigating defects . However, there are too many complicated desorption and adsorption processes between OA and OAm, which prevent them from stably binding to the surface of PeQDs.…”

Section: Introductionmentioning

confidence: 99%

Efficient CsPbBr₃ Perovskite Light-Emitting Diodes via Novel Multi-Step Ligand Exchange Strategy Based on Zwitterionic Molecules

Zeng,

Meng,

Yang

et al. 2024

ACS Appl. Mater. Interfaces

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Perovskite nanocrystals have absorbed increasing interest, especially in the field of optoelectronics, owing to their unique characteristics, including their tunable luminescence range, robust solution processability, facile synthesis, and so on. However, in practice, due to the inherent instability of the traditional long-chain insulating ligands surrounding perovskite quantum dots (PeQDs), the performance of the as-fabricated QLED is relatively disappointing. Herein, the zwitterion 3-(decyldimethylammonio)propanesulfonate (DLPS) with the capability of double passivating perovskite quantum dots could effectively replace the original long-chain ligand simply through a multistep post-treatment strategy to finally inhibit the formation of defects. It was indicated from theexperimental results that the DLPS, as one type of ligand with the bimolecular ion, was very adavntageous in replacing long-chain ligands and further suppressing the formation of defects. Finally, the perovskite quantum dots with greatly enhanced PLQY as high as 98% were effectively achieved. Additionally, the colloidal stability of the corresponding PeQDs has been significantly enhanced, and a transparent colloidal solution was obtained after 45 days under ambient conditions. Finally, the asfabricated QLEDs based on the ligand-exchanged PeQDs exhibited a maximum brightness of 9464 cd/m 2 and an EQE of 12.17%.

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“…It is further demonstrated that the anchoring groups and alkyl chain lengths of organic ligands decide the charge transfer from the core of QDs to lignin. 35 Furthermore, inorganic ligands (e.g., thiocyanate (SCN − ) and hexafluorophosphate (PF 6 − )) exhibit potential advantages as capping agents due to their high electron mobility, 36 high photoconductivity, 37 and enhanced thermoelectric performance. 38 However, different functions of the organic and inorganic ligands attached to QDs for electron and hole transfer in photocatalytic lignin valorization remain unsolved to the present date.…”

Section: Introductionmentioning

confidence: 99%

Inorganic–Organic Dual-Ligand-Regulated Photocatalysis of CdS@Zn_xCd_1–xS@ZnS Quantum Dots for Lignin Valorization

Guo,

Chen,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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In a dual-functional lignin valorization system, a harmonious oxidation and reduction rate is a prerequisite for high photocatalytic performance. Herein, an efficient and facile ligand manipulating strategy to balance the redox reaction process is exploited via decorating the surface of the CdS@Zn x Cd1–x S@ZnS gradient-alloyed quantum dots with both inorganic ligands of hexafluorophosphate (PF6 –) and organic ligands of mercaptopropionic acid (MPA). Inorganic ion ligands in this system provide a promotion for intermediator reduction reactions. By optimizing the ligand composition on the quantum dot surface, we achieve precise control over the extent of oxidation and reduction, enabling selective modification of reaction products; that is, the conversion rate of 2-phenoxy-1-phenylethanol reached 99%. Surface engineering by regulating the ligand type demonstrates that PF6 – and thiocyanate (SCN–) inorganic ion ligands contribute significantly toward electron transfer, while MPA ligands have beneficial effects on the hole-transfer procedure, which is predominantly dependent on their steric hindrance, electrostatic action, and passivation effect. The present study offers insights into the development of efficient quantum dot photocatalysts for dual-functional biomass valorization through ligand design.

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The efficient green light-emitting diodes based on low-toxicity Zr-Pb alloy perovskite quantum dots passivated by inorganic ligand

Cited by 9 publications

References 57 publications

Metal/Covalent Organic Framework Encapsulated Lead-Free Halide Perovskite Hybrid Nanocatalysts: Multifunctional Applications, Design, Recent Trends, Challenges, and Prospects

Metal/Covalent Organic Framework Encapsulated Lead-Free Halide Perovskite Hybrid Nanocatalysts: Multifunctional Applications, Design, Recent Trends, Challenges, and Prospects

Efficient CsPbBr₃ Perovskite Light-Emitting Diodes via Novel Multi-Step Ligand Exchange Strategy Based on Zwitterionic Molecules

Inorganic–Organic Dual-Ligand-Regulated Photocatalysis of CdS@Zn_xCd_1–xS@ZnS Quantum Dots for Lignin Valorization

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The efficient green light-emitting diodes based on low-toxicity Zr-Pb alloy perovskite quantum dots passivated by inorganic ligand

Cited by 9 publications

References 57 publications

Metal/Covalent Organic Framework Encapsulated Lead-Free Halide Perovskite Hybrid Nanocatalysts: Multifunctional Applications, Design, Recent Trends, Challenges, and Prospects

Metal/Covalent Organic Framework Encapsulated Lead-Free Halide Perovskite Hybrid Nanocatalysts: Multifunctional Applications, Design, Recent Trends, Challenges, and Prospects

Efficient CsPbBr3 Perovskite Light-Emitting Diodes via Novel Multi-Step Ligand Exchange Strategy Based on Zwitterionic Molecules

Inorganic–Organic Dual-Ligand-Regulated Photocatalysis of CdS@ZnxCd1–xS@ZnS Quantum Dots for Lignin Valorization

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Efficient CsPbBr₃ Perovskite Light-Emitting Diodes via Novel Multi-Step Ligand Exchange Strategy Based on Zwitterionic Molecules

Inorganic–Organic Dual-Ligand-Regulated Photocatalysis of CdS@Zn_xCd_1–xS@ZnS Quantum Dots for Lignin Valorization