Full‐Spectrum Persistent Luminescence Tuning Using All‐Inorganic Perovskite Quantum Dots

Gong, Zhongliang; Zheng, Wei; Gao, Yu; Huang, Ping; Tu, Datao; Li, Renfu; Wei, Jiaojiao; Zhang, Wen; Zhang, Yunqin; Chen, Xueyuan

doi:10.1002/anie.201901045

Cited by 119 publications

(60 citation statements)

References 47 publications

(20 reference statements)

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“…Exciton confinement in small volumes leads to an increase in exciton binding energy, may resulting in an enhancement of the radiative recombination mediated by excitons rather than free electron and holes. [ 23 ] Unfortunately, few study reported inorganic perovskites nanocrystals as LPL materials, [ 24 ] because the LPL output is the mutual cooperation of activator and defect centers. [ 25 ] Although inorganic perovskites yields attractive emission as direct bandgap semiconductors, defect states acting as effective trapping centers that can capture and liberate carriers for the subsequent migration to the emission centers [ 26 ] are absence from the perovskites.…”

Section: Introductionmentioning

confidence: 99%

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Zhang

Yang

Zhao

et al. 2020

Advanced Optical Materials

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The advantages of ultrahigh https://photoluminescence quantum yield and narrow spectral bandwidth of all‐inorganic lead halide perovskite https://nanocrystals (NCs) enable them as the most potential candidates for optoelectronic applications. However, it is difficult to obtain long persistent luminescence from inorganic perovskite https://nanocrystals as the creation of effective trapping centers comes along with the generation of nonradioactive recombination centers. Here, replacing Pb2+ by appropriate lanthanide ions (Ln3+) in CsPbBr3 https://nanocrystals that are embedded inside an amorphous transparent medium via a high‐temperature (≈500 °C) fabrication process is proposed to achieve stable and effective trapping centers. Furthermore, the surface coating of the enclosed https://nanocrystals prevents the formation of surface defects, leading to long persistent luminescence from CsPbBr3: Ln3+ NCs. The CsPbBr3: Ln3+ NCs with unprecedented high color purity (≈89.9%) and long lasting time of more than 1800 s could be a promising candidate for the application in anti‐counterfeiting.

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Section: Introductionmentioning

confidence: 99%

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Zhang

Yang

Zhao

et al. 2020

Advanced Optical Materials

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“…Long persistent luminescence (LPL) materials,a lso known as afterglow or long-lasting phosphorescence materials,have aroused extensive attention due to their long triplet excited state and potential applications in bioimaging, [1] anticounterfeiting, [2] data encryption, [3] light-emitting diodes, [4] phosphorescence lasing [5] and so forth. In the past decades, numerous materials with LPL phenomenon have been developed, including inorganic metal oxides, [6] carbon quantum dots, [7] perovskites, [8] organic polymers, [9] pure organic phosphors [10] and metal-organic materials. [11] Besides the pursuit of long LPL lifetime and high brightness,the controllable and tunable LPL color is another important attribute when applying these materials.…”

Section: Introductionmentioning

confidence: 99%

Multi‐Mode Color‐Tunable Long Persistent Luminescence in Single‐Component Coordination Polymers

Wang

Zhu

et al. 2020

Angewandte Chemie

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Materials with tunable long persistent luminescence (LPL) properties have wide applications in security signs, anti‐counterfeiting, data encrypting, and other fields. However, the majority of reported tunable LPL materials are pure organic molecules or polymers. Herein, a series of metal‐organic coordination polymers displaying color‐tunable LPL were synthesized by the self‐assembly of HTzPTpy ligand with different cadmium halides (X=Cl, Br, and I). In the solid state, their LPL emission colors can be tuned by the time‐evolution, as well as excitation and temperature variation, realizing multi‐mode dynamic color tuning from green to yellow or green to red, and are the first such examples in single‐component coordination polymer materials. Single‐crystal X‐ray diffraction analysis and theoretical calculations reveal that the modification of LPL is due to the balanced action from single molecule and aggregate triplet excited states caused by an external heavy‐atom effect. The results show that the rational introduction of different halide anions into coordination polymers can realize multi‐color LPL.

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“…Solid‐state luminescent materials with long persistent luminescence (LPL) have attracted extensive interest due to their fascinating photophysical phenomena and potential applications in bio‐imaging, photodynamic therapy, anticounterfeiting, OLEDs, photocatalysis, and so on. Many materials with LPL characteristics have been studied, such as inorganic oxide materials, perovskites, polymers, pure organic phosphors, and metal–organic materials . MOFs have attracted special attention due to their flexible structural design and outstanding properties.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Long Persistent Luminescence by Multifold Interpenetration in Metal–Organic Frameworks

Wang

Zhu

et al. 2020

Chemistry A European J

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Metal–organic frameworks (MOFs) with long persistent luminescence (LPL) have attracted widespread attention due to potential applications in displays, anticounterfeiting, and so on. However, MOFs often have large pore size, which restricts the formation of efficient inter‐ and intramolecular interactions to realize LPL. Herein, a new approach to achieving LPL in MOFs by multifold interpenetration of discrete frameworks is reported. By comparison between threefold‐ and twofold‐interpenetrating MOFs, it was found that the former, which have higher multiplicity and denser frameworks, can be endowed with enhanced inter‐ and intramolecular interactions, and thus enhanced LPL is obtained. Meanwhile, metal‐cluster and heavy‐halogen effects could also cause variations in LPL duration and color.

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Full‐Spectrum Persistent Luminescence Tuning Using All‐Inorganic Perovskite Quantum Dots

Abstract: Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Cited by 119 publications

References 47 publications

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Long Persistent Luminescence from All‐Inorganic Perovskite Nanocrystals

Multi‐Mode Color‐Tunable Long Persistent Luminescence in Single‐Component Coordination Polymers

Enhanced Long Persistent Luminescence by Multifold Interpenetration in Metal–Organic Frameworks

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