Luminescent perovskites: recent advances in theory and experiments

Inorganic Chemistry Frontiers, Год журнала: 2019, Номер 6(11), С. 2969 - 3011

Опубликована: Янв. 1, 2019

This review summarizes previous research on luminescent perovskites, including oxides and halides, with different structural dimensionality. The relationship between the crystal structure, electronic structure properties is discussed in detail.

Язык: Английский

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

Advanced Optical Materials, Год журнала: 2021, Номер 9(17)

Опубликована: Май 31, 2021

Abstract 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 recent great achievements on their application in lighting, artificial illumination, and scintillators. Among family crystals, zero‐dimensional (0D) materials been featured lowest dimensionality, a consequence, strongest quantum confinement, softest lattice, electron–phonon coupling further translated into near‐unity photoluminescence (PL) efficiency with broadband emission. However, far it is known, 0D structures are significantly underexplored. Herein, an overview provided advances focus comprehensive understanding insightful perspectives behind photophysical mechanism. Additionally, challenges future opportunities currently faced by bulk metal halides discussed order to provide roadmap for development novel versatile optical suited practical applications.

Язык: Английский

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Extrinsic nature of the broad photoluminescence in lead iodide-based Ruddlesden–Popper perovskites

Nature Communications, Год журнала: 2020, Номер 11(1)

Опубликована: Май 11, 2020

Abstract Two-dimensional metal halide perovskites of Ruddlesden–Popper type have recently moved into the centre attention perovskite research due to their potential for light generation and stabilisation 3D counterparts. It has become widespread in field attribute broad luminescence with a large Stokes shift self-trapped excitons, forming strong carrier–phonon interactions these compounds. Contrarily, by investigating behaviour two types lead-iodide based single crystals, we here highlight extrinsic origin band emission. As shown below-gap excitation, in-gap states crystal bulk are responsible With this insight, further understanding emission properties low-dimensional question generality attribution related compounds excitons.

Язык: Английский

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Reaching 90% Photoluminescence Quantum Yield in One-Dimensional Metal Halide C₄N₂H₁₄PbBr₄ by Pressure-Suppressed Nonradiative Loss

Journal of the American Chemical Society, Год журнала: 2020, Номер 142(37), С. 16001 - 16006

Опубликована: Сен. 1, 2020

Low-dimensional perovskite-related metal halides have emerged as a new class of light-emitting materials with tunable broadband emission from self-trapped excitons (STEs). Although various types low-dimensional structures been developed, fundamental understating the structure-property relationships for this is still very limited, and further improvement their optical properties remains greatly important. Here, we report significant pressure-induced photoluminescence (PL) enhancement in one-dimensional hybrid halide C4N2H14PbBr4, underlying mechanisms are investigated using situ experimental characterization first-principles calculations. Under gigapascal pressure scale, PL quantum yields (PLQYs) were quantitatively determined to show dramatic increase initial value 20% at ambient conditions over 90% 2.8 GPa. With photophysical theoretical analysis, found that PLQY was mainly attributed suppressed nonradiative decay. Pressure can effectively tune energy level states exciton binding energy, which leads larger Stokes shift. The resulting highly localized stronger reduce probability carrier scattering, result significantly Our findings clearly characteristics STEs be well-tuned by external pressure, enhanced achieved.

Язык: Английский

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Structural Descriptors to Correlate Pb Ion Displacement and Broadband Emission in 2D Halide Perovskites

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(40), С. 18595 - 18606

Опубликована: Окт. 3, 2022

2D hybrid lead halide perovskites exhibit versatile photoluminescent behaviors for narrowband to broadband emissions (BBEs) and have become attractive candidates potential applications such as solid-state lighting. Establishing the relationship between perovskite structural distortion BBE is key but challenging in designing optimizing luminophores. Conventional attention given analyzing intra-octahedron of [PbX6]4- (X = halide) unit that has not yet provided a clear structure-luminescence relationship. Herein, we introduce descriptor, Pb displacement, describe inter-octahedron clarify structure-emission The displacement adjacent centers represents lattice distortion, which determines broadband/narrowband emission instead octahedron itself. We find kite-type quadrilateral rule (001) type perovskites, is, degree four octahedral central ions deviate from square relates BBE. arrangement usually corresponds BBEs due large structure distortions. In contrast, square-type because small descriptor magnifies scale, making it larger than conventional one matches general concept excitons based on scale crystal lattice. Therefore, set descriptors better correlate structures properties.

Язык: Английский

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Pure White Emission with 91.9% Photoluminescence Quantum Yield of [(C₃H₇)₄N]₂Cu₂I₄ out of Polaronic States and Ultra-High Color Rendering Index

ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 14(10), С. 12395 - 12403

Опубликована: Март 2, 2022

Recently, cuprous halide perovskite-type materials have drawn tremendous attention for their intriguing optical properties. Here, a zero-dimensional (0D) Cu(I)-based compound of [(C3H7)4N]2Cu2I4 ([C3H7)4N]+ = tetrapropylammonium cation) was synthesized by facile solution method, monoclinic system P21/n symmetry with Cu2I42- cluster as the confined structure. The as-synthesized exhibits bright dual-band pure white emission photoluminescence quantum yield (PLQY) 91.9% and CIE color coordinates (0.33, 0.35). Notably, this also an ultrahigh rendering index (CRI) 92.2, which is comparable to highest value single-component metal halides reported recently. Its Raman spectra provide clear spectral profile strong electron-phonon interaction after [(C3H7)4N]+ incorporation, favoring self-trapped exciton (STE) formation. can give dual-STE bands at same time because Cu-Cu bond in cluster, whose populations could be scaled temperature, together local dipole orientation modulation neighboring STEs phase transition related coordinate change. Particularly, outstanding chemical- antiwater stability demonstrated. This work illustrates potential such multifunctional applications, lighting varied environments.

Язык: Английский

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Design Rules for Obtaining Narrow Luminescence from Semiconductors Made in Solution

Chemical Reviews, Год журнала: 2023, Номер 123(12), С. 7890 - 7952

Опубликована: Июнь 13, 2023

Solution-processed semiconductors are in demand for present and next-generation optoelectronic technologies ranging from displays to quantum light sources because of their scalability ease integration into devices with diverse form factors. One the central requirements used these applications is a narrow photoluminescence (PL) line width. Narrow emission widths needed ensure both color single-photon purity, raising question what design rules obtain made solution. In this review, we first examine colloidal emitters variety including light-emitting diodes, photodetectors, lasers, information science. Next, will delve spectral broadening, "homogeneous" broadening dynamical mechanisms single-particle spectra, heterogeneous static structural differences ensemble diffusion. Then, compare current state art terms width materials II–VI dots (QDs) nanoplatelets, III–V QDs, alloyed metal–halide perovskites nanocrystals 2D structures, doped nanocrystals, and, finally, as point comparison, organic molecules. We end some conclusions connections, an outline promising paths forward.

Язык: Английский

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Chemical doping of lead-free metal-halide-perovskite related materials for efficient white-light photoluminescence

Materials Today Physics, Год журнала: 2023, Номер 31, С. 100992 - 100992

Опубликована: Фев. 1, 2023

Язык: Английский

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Phase Transitions and Dynamics in Mixed Three- and Low-Dimensional Lead Halide Perovskites

Chemical Reviews, Год журнала: 2024, Номер 124(5), С. 2281 - 2326

Опубликована: Фев. 29, 2024

Lead halide perovskites are extensively investigated as efficient solution-processable materials for photovoltaic applications. The greatest stability and performance of these compounds achieved by mixing different ions at all three sites the APbX

Язык: Английский

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Bulk Assembly of Zero-Dimensional Organic Lead Bromide Hybrid with Efficient Blue Emission

ACS Materials Letters, Год журнала: 2019, Номер 1(6), С. 594 - 598

Опубликована: Окт. 21, 2019

Zero-dimensional (0D) organic metal halide hybrids are an emerging class of light emitting materials with exceptional photoluminescence quantum efficiencies (PLQEs), thanks to their perfect "host–guest" structures species periodically "embedded" in a wide band gap cationic matrix through ionic bonds. However, achieving efficient blue emissions is challenging for this materials, as structural distortions halides often lead large Stokes shifts. Here we report highly luminescent 0D bromide, (C13H19N4)2PbBr4, peak emission 460 nm (2.70 eV), full width at half maximum (FWHM) 66 (0.40 shift 111 (0.85 and PLQE ∼40%. Single crystal structure analysis shows that individual PbBr42– adopt near-seesaw structure, which coordinated benzyl-hexamethylenetetrammonium (C13H19N4+) cations. The relatively small compared those previously reported attributed the low chemical reactivity Pb 6s2 lone pairs rigid matrix. (C13H19N4)2PbBr4 also stability air little-to-no change properties more than year ambient conditions.

Язык: Английский

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