Intercalated formation of two-dimensional and multi-layered perovskites in organic thin films

Takeoka, Yuko; Fukasawa, Miyuki; Matsui, Takashi; Kikuchi, Kentaro; Rikukawa, Masahiro; Sanui, Kohei

doi:10.1039/b413398f

Cited by 37 publications

(31 citation statements)

References 7 publications

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“…Their contribution is determined by the ratio of short chain MA and long chain octylammonium (OTA) precursors during the synthesis. [30][31][32] We can also observe some nanoplatelets in the TEM images but they are only minor species (for the details see SI3). Such 2D structures may affect the photo-induced dynamics of the NPs as will be discussed below.…”

mentioning

confidence: 89%

Exciton Binding Energy and the Nature of Emissive States in Organometal Halide Perovskites

Zheng

Zhu

Abdellah

et al. 2015

J. Phys. Chem. Lett.

219

245

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Characteristics of nanoscale materials are often different from the corresponding bulk properties providing new, sometimes unexpected, opportunities for applications. Here we investigate the properties of 8 nm colloidal nanoparticles of MAPbBr3 perovskites and contrast them to the ones of large microcrystallites representing a bulk. X-ray spectroscopies provide an exciton binding energy of 0.32 ± 0.10 eV in the nanoparticles. This is 5 times higher than the value of bulk crystals (0.084 ± 0.010 eV), and readily explains the high fluorescence quantum yield in nanoparticles. In the bulk, at high excitation concentrations, the fluorescence intensity has quadratic behavior following the Saha-Langmuir model due to the nongeminate recombination of charges forming the emissive exciton states. In the nanoparticles, a linear dependence is observed since the excitation concentration per particle is significantly less than one. Even the bulk shows linear emission intensity dependence at lower excitation concentrations. In this case, the average excitation spacing becomes larger than the carrier diffusion length suppressing the nongeminate recombination. From these considerations we obtain the charge carrier diffusion length in MAPbBr3 of 100 nm.

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mentioning

confidence: 89%

Exciton Binding Energy and the Nature of Emissive States in Organometal Halide Perovskites

Zheng

Zhu

Abdellah

et al. 2015

J. Phys. Chem. Lett.

219

245

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“…X-ray diffraction (XRD) is a frequently used method to characterize the ordering within the self-organized 2DOIPs [34,35]. Figure 4 presents XRD pattern measured on a spin-coated 50-nm-thick PhE-PbI

_{4}

film.…”

Section: Characterizationsmentioning

confidence: 99%

Preparations and Characterizations of Luminescent Two Dimensional Organic-inorganic Perovskite Semiconductors

et al. 2010

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This article reviews the synthesis, structural and optical characterizations of some novel luminescent two dimensional organic-inorganic perovskite (2DOIP) semiconductors. These 2DOIP semiconductors show a self-assembled nano-layered structure, having the electronic structure of multi-quantum wells. 2DOIP thin layers and nanoparticles have been prepared through different methods. The structures of the 2DOIP semiconductors are characterized by atomic force microscopy and X-ray diffraction. The optical properties of the 2DOIP semiconductors are characterized from absorption and photoluminescence spectra measured at room and low temperatures. Influences of different components, in particular the organic parts, on the structural and optical properties of the 2DOIP semiconductors are discussed.

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“…2͑c͔͒ show the persistent presence of higher-order ͑00l͒ diffraction peaks indicating that the layer stacking along the c axis is uniform throughout the film. However for films more than 130 nm thick, the appearance of a weak diffraction peak at 12.5°r elated to PbI 2 suggests that the intercalation process does not fully complete within 10 s. Since further structural developments are not observed, possibilities such as formation of bilayers of inorganic/organic entities 12 and/or distortion of the 2D network can be ruled out. The extra Stokes shift could thus be due to either distorted bond angles within ͑PbI 6 ͒ 4− octahedra 13 or due to the low-level presence of unreacted lead iodide impurities.…”

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confidence: 99%

In situintercalation strategies for device-quality hybrid inorganic-organic self-assembled quantum wells

Kannan¹,

Baumberg²,

Prakash³

2009

Appl. Phys. Lett.

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Intercalated formation of two-dimensional and multi-layered perovskites in organic thin films

Abstract: Two-dimensional and multi-layered perovskites, [NH3(CH2)12NH3]PbBr4 and [NH3(CH2)12NH3](CH3NH3)(n-1)Pb(n)Br(3n+1), with a quantum confinement effect have been naturally formed by intercalating lead bromide into organic alkyldiammonium bromide frameworks.

Cited by 37 publications

References 7 publications

Exciton Binding Energy and the Nature of Emissive States in Organometal Halide Perovskites

Exciton Binding Energy and the Nature of Emissive States in Organometal Halide Perovskites

Preparations and Characterizations of Luminescent Two Dimensional Organic-inorganic Perovskite Semiconductors

In situintercalation strategies for device-quality hybrid inorganic-organic self-assembled quantum wells

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