Strong plasmon–exciton coupling in colloidal halide perovskite nanocrystals near a metal film

Guvenc, C. Meric; Polat, Nahit; Balci, Sinan

doi:10.1039/d0tc04209a

Cited by 16 publications

(14 citation statements)

References 56 publications

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“…They include high absorption coefficients, high optical gain, high luminescence quantum yield, robust excitons at room temperature, broadband bandgap tunability, solution processability, facile fabrication, and simplicity of their integration into various optical microcavities—all of that make them an ideal candidate for polaritonic applications. [ 10–12 ] Various resonant photonic nanocavities, including Fabry–Perot cavity [ 13–15 ] and plasmonic nanocavity, [ 16–19 ] have been proposed to demonstrate the strong coupling between exciton of perovskite and cavity resonance. For example, in 2019, [ 20 ] strong exciton–photon coupling was reported at room temperature in a planar microcavity containing a large surface of spin‐coated CH 3 NH 3 PbBr 3 thin film as an active material with a Rabi splitting of 70 meV.…”

Section: Introductionmentioning

confidence: 99%

Strong Coupling of Exciton and High‐Q Mode in All‐Perovskite Metasurfaces

Al-Ani

As’ham

Huang

et al. 2021

Advanced Optical Materials

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Recently developed halide perovskite semiconductors are viewed as an excellent platform to realize exciton‐polariton at room temperature due to their large oscillation strength. Here, the optimized strong coupling between the exciton of perovskite and quasi‐bound state in the continuum (QBIC) with high‐quality factor (Q‐factor), supported by all‐perovskite metagrating, including magnetic dipole (MD)‐QBIC and toroidal dipole (TD)‐QBIC is demonstrated. By taking advantage of extreme electric field confinement enabled by a high‐Q mode, it is found that the maximum Rabi splitting can be enhanced up to a record high value of 400 meV, almost twice the Rabi splitting reported in the same perovskite‐based subwavelength metasurface. The simulation results reveal that both the Q‐factor of QBIC mode and the thickness of the perovskite metasurface play dominant roles in the enhanced strong coupling. It is also demonstrated that adding a protection layer of poly(methyl methacrylate) on the top of the perovskite metagrating has a negligible effect on the maximized Rabi‐splitting. These results suggest a new approach for studying exciton‐polaritons and may pave the way toward flexible, large‐scale, and low‐cost integrated polaritonic devices and the realization of polariton lasing at room temperature.

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Section: Introductionmentioning

confidence: 99%

Strong Coupling of Exciton and High‐Q Mode in All‐Perovskite Metasurfaces

Al-Ani

As’ham

Huang

et al. 2021

Advanced Optical Materials

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“…Lead halide perovskite nanoplatelets have attracted considerable attention in recent years owing to their unique optical and optoelectronic properties. Especially, narrow absorption and emission line widths, tunable bandgaps, high exciton binding energies, high defect tolerance, and highly localized energy levels of lead halide perovskite nanoplatelets make them a great candidate for the state of the art electronic, optoelectronic, and photonic technologies [1–7] . Optical and structural properties of the layered organic‐inorganic halide perovskite nanocrystals have been extensively studied [8–12] .…”

Section: Introductionmentioning

confidence: 99%

Seed‐Mediated Synthesis of Colloidal 2D Halide Perovskite Nanoplatelets

Guvenc

Balci

2021

ChemNanoMat

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Colloidal synthesis of two‐dimensional lead halide perovskite nanoplatelets (2D LHP NPLs) with a general formula of L2[APbX3]n−1PbX4 has been widely performed by using hot‐injection or ligand assisted reprecipitation methods. Herein, for the first time, we report on seed‐mediated synthesis of two and three monolayers (n=2, 3) lead halide perovskite nanoplatelets without using A‐site cation halide salt (AX; A=Cesium, methylammonium, formamidinium and, X=Cl, Br, I) and long chain alkylammonium halide salts (LX; L=oleylammonium, octylammonium, butylammonium and, X=Cl, Br, I). The nanocrystal seeds have been prepared by reacting lead (II) halide salt and coordinating ligands in a nonpolar solvent and then they have been reacted with cesium oleate, formamidinium oleate or methylamine. Our facile synthesis route enabling further understanding of the growth dynamics of LHP NPLs provides highly stable, monodisperse NPLs with very narrow absorption and emission linewidths (min. 68 meV), and high PLQY (max. 37.6%).

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“…energy exchange between plasmons and excitons leads to the splitting of the excited state, i.e., Rabi splitting, and produce the new hybrid modes (Figure 13b). [196,197] Guvenc et al studied the strong plasmon-exciton coupling in colloidal halide perovskite nanocrystals with various morphologies and compositions. [196] The colloidal halide perovskite nanocrystals (i.e., CsPbBr x I 3-x NPls, CsPbI 3 NPls, CsPbI 3 nanowires) were placed on a flat silver metal film functionalized with 16-mercaptohexadecanoic acid.…”

Section: Nonlinear Optical Propertiesmentioning

confidence: 99%

“…b) Schematic dispersion curves for plasmon-exciton mixed states formed with the exciton of perovskite nanoplatelets and surface plasmon polaritons in the strong coupling regime. Reproduced with permission [196]. Copyright 2020, Royal Society of Chemistry.…”

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confidence: 99%

Colloidal Metal‐Halide Perovskite Nanoplatelets: Thickness‐Controlled Synthesis, Properties, and Application in Light‐Emitting Diodes

et al. 2022

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Colloidal metal‐halide perovskite nanocrystals (MHP NCs) are gaining significant attention for a wide range of optoelectronics applications owing to their exciting properties, such as defect tolerance, near‐unity photoluminescence quantum yield, and tunable emission across the entire visible wavelength range. Although the optical properties of MHP NCs are easily tunable through their halide composition, they suffer from light‐induced halide phase segregation that limits their use in devices. However, MHPs can be synthesized in the form of colloidal nanoplatelets (NPls) with monolayer (ML)‐level thickness control, exhibiting strong quantum confinement effects, and thus enabling tunable emission across the entire visible wavelength range by controlling the thickness of bromide or iodide‐based lead‐halide perovskite NPls. In addition, the NPls exhibit narrow emission peaks, have high exciton binding energies, and a higher fraction of radiative recombination compared to their bulk counterparts, making them ideal candidates for applications in light‐emitting diodes (LEDs). This review discusses the state‐of‐the‐art in colloidal MHP NPls: synthetic routes, thickness‐controlled synthesis of both organic–inorganic hybrid and all‐inorganic MHP NPls, their linear and nonlinear optical properties (including charge‐carrier dynamics), and their performance in LEDs. Furthermore, the challenges associated with their thickness‐controlled synthesis, environmental and thermal stability, and their application in making efficient LEDs are discussed.

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Strong plasmon–exciton coupling in colloidal halide perovskite nanocrystals near a metal film

Abstract: All inorganic colloidal halide perovskite nanoplatelets and nanowires are highly anisotropic shaped semiconductor nanocrystals with highly tunable optical properties in the visible spectrum. These nanocrystals have large exciton binding energies...

Cited by 16 publications

References 56 publications

Strong Coupling of Exciton and High‐Q Mode in All‐Perovskite Metasurfaces

Strong Coupling of Exciton and High‐Q Mode in All‐Perovskite Metasurfaces

Seed‐Mediated Synthesis of Colloidal 2D Halide Perovskite Nanoplatelets

Colloidal Metal‐Halide Perovskite Nanoplatelets: Thickness‐Controlled Synthesis, Properties, and Application in Light‐Emitting Diodes

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