White Light Emission from a Zero-Dimensional Lead Chloride Hybrid Material

The high‐profile candidacy of low‐dimensional metal‐halide single crystals as promising light emitters originates from the intriguing emission properties (e.g., extremely broad luminescence spectra, large Stokes shift, high color rendition), which have enabled the recent great achievements on their application in lighting, artificial illumination, and scintillators. Among the family of low‐dimensional metal‐halide single crystals, zero‐dimensional (0D) materials have been featured in the lowest dimensionality, and as a consequence, strongest quantum confinement, softest lattice, and strongest electron–phonon coupling have been further translated into near‐unity photoluminescence (PL) efficiency with broadband emission. However, as far as it is known, 0D structures are significantly underexplored. Herein, an overview is provided on recent advances of 0D metal‐halide single crystals, with a focus on comprehensive understanding and insightful perspectives behind the photophysical mechanism. Additionally, the challenges and future opportunities currently faced by 0D bulk metal halides are discussed in order to provide a roadmap for the future development of novel materials with versatile optical properties suited for practical applications.

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“…Therefore, this work enriches the restricted family of metal‐halide single crystal with white‐light emission. [ 45 ]…”

Section: Broadened Emission From 0d Metal Halidesmentioning

confidence: 99%

“…f) Room-temperature emission spectra of (TAE) 2 (Pb 2 Cl 10 )(Cl) 2 excited at 3.30 eV (black), 3.81 eV (red), and 4.66 eV (blue). Reproduced with permission [45]. Copyright 2020, American Chemical Society.…”

mentioning

confidence: 99%

An Overview for Zero‐Dimensional Broadband Emissive Metal‐Halide Single Crystals

Zhou

Liao

Kuang

2021

Advanced Optical Materials

162

132

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“…This material achieved almost pure white light emission with CIE coordinates of (0.30,0.33), but the luminous intensity strongly varied with temperature. [ 93 ]…”

Section: Recent Progress In Perovskite Materials For Wledsmentioning

confidence: 99%

“…This finding is of great significance for the development of lead‐free white light perovskite materials with color rendering. [ 93 ] Yanui et al used mercury and zinc as lead substitutes for the preparation of two hybrid perovskites, (C 5 H 7 N 2 ) 2 HgBr 4 and (C 5 H 7 N 2 ) 2 ZnBr 4 . Under the excitation of 325 nm UV light, the CIE coordinates of the two materials were (0.34, 0.38) and (0.25, 0.26), respectively, close to the white light region.…”

Section: Recent Progress In Perovskite Materials For Wledsmentioning

confidence: 99%

“…of (0.30,0.33), but the luminous intensity strongly varied with temperature. [93] Low-dimensional hybrid perovskites have great potential in the field of luminescent materials, but it is still difficult to find highly efficient hybrid perovskite materials with specific characteristics, because of the large number of combinations between the different halides, metals, and organic molecules. Moreover, it is difficult to effectively predict the optical properties of the materials before they are synthesized.…”

Section: Organic-inorganic Hybrid Perovskite Materials For Wledmentioning

confidence: 99%

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Rare Earth‐Free Luminescent Materials for WLEDs: Recent Progress and Perspectives

Zhang

Pan

et al. 2020

Adv Materials Technologies

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The development and application of white light‐emitting diode (WLED) lighting technology are of great significance for reducing energy consumption. Commonly used WLED devices rely on the use of rare earth luminescent materials. However, rare earth elements are nonrenewable resources, and mining and refining processes have an adverse impact on the environment. In recent years, new white light‐emitting luminescent materials that do not contain rare earth elements have been developed, such as quantum dots, fluorescent carbon dots, perovskite luminescent materials, organic luminescent materials, and metal–organic framework materials, among others, some of which are successfully applied in the development of WLEDs. Herein the latest progress in this research field is reviewed, analyzing the construction of practical WLED devices and comparing the characteristics of newly developed rare earth‐free luminescent materials. Last, the future development prospects in this field are described.

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Efficient Circularly Polarized Luminescence and Bright White Emission from Hybrid Indium‐Based Perovskites via Achiral Building Blocks

Du,

Zhou,

et al. 2024

Adv Funct Materials

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Chiral organic‐inorganic hybrid perovskites (OIHPs) exhibit exceptional optical and chiral properties, demonstrating potential for 3D display, circularly polarized light‐emitting diodes (CP‐LEDs), and CPL switches. However, the construction of chiral OIHPs often relies on chiral building blocks, limiting chemical diversity, and possessing challenges in achieving large asymmetry factor (glum) without sacrificing photoluminescence quantum yield (PLQY). Here, Chiral DMA4In1‐xSbxCl7 (DMA = dimethylammonium, x = 0 to 1) with superior circularly polarized luminescence (CPL) are successfully constructed based on achiral building blocks DMA+ and metal halides. By optimizing the Sb3+ content, bright white emission with a high PLQY of 69.13% is achieved, as well as near‐unity PLQY yellow emission and strong CPL signals with a glum of up to +1.40 × 10−2, exhibiting a performance comparable to state‐of‐the‐art chiral OIHPs. Combining optical characterizations and theoretical calculations reveal that these intriguing properties originate from the intrinsic chiral helical structures and a pair of perfect complementary color emissions in DMA4In1‐xSbxCl7. In addition, DMA4In1‐xSbxCl7 exhibit excellent thermal stability and mild thermal quenching in the temperature range of 300 to 420 K. These fascinating properties suggest that DMA4In1‐xSbxCl7 have significant applications in white light‐emitting diodes (WLED), 3D displays and anti‐counterfeiting.

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White Light Emission from a Zero-Dimensional Lead Chloride Hybrid Material

Cited by 48 publications

References 81 publications

An Overview for Zero‐Dimensional Broadband Emissive Metal‐Halide Single Crystals

An Overview for Zero‐Dimensional Broadband Emissive Metal‐Halide Single Crystals

Rare Earth‐Free Luminescent Materials for WLEDs: Recent Progress and Perspectives

Efficient Circularly Polarized Luminescence and Bright White Emission from Hybrid Indium‐Based Perovskites via Achiral Building Blocks

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