Porous and Shape‐Anisotropic Single Crystals of the Semiconductor Perovskite CH3NH3PbI3 from a Single‐Source Precursor

Kollek, Tom; Gruber, Daniel; Gehring, Julia; Zimmermann, Eugen; Schmidt‐Mende, Lukas; Polarz, Sebastian

doi:10.1002/anie.201408713

Cited by 56 publications

(46 citation statements)

References 37 publications

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“…Park et al 25 prepared a cross-sectional whole device of glass/FTO/mp-TiO 2 /MAPbI 3 /spiro-OMeTAD, and similarly the {110} spots were absent. Polarz et al 26 developed metal–organic porous single-crystalline MAPbI 3 and also did not observe the (10) spots. Furthermore, Tang et al 27 , Vela et al 28 , and Zhu et al 29 found that the {110} spots were missing in MAPbI 3 nanowires.…”

Section: Introductionmentioning

confidence: 97%

Atomic scale insights into structure instability and decomposition pathway of methylammonium lead iodide perovskite

et al. 2018

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Organic–inorganic hybrid perovskites are promising candidates for the next-generation solar cells. Many efforts have been made to study their structures in the search for a better mechanistic understanding to guide the materials optimization. Here, we investigate the structure instability of the single-crystalline CH3NH3PbI3 (MAPbI3) film by using transmission electron microscopy. We find that MAPbI3 is very sensitive to the electron beam illumination and rapidly decomposes into the hexagonal PbI2. We propose a decomposition pathway, initiated with the loss of iodine ions, resulting in eventual collapse of perovskite structure and its decomposition into PbI2. These findings impose important question on the interpretation of experimental data based on electron diffraction and highlight the need to circumvent material decomposition in future electron microscopy studies. The structural evolution during decomposition process also sheds light on the structure instability of organic–inorganic hybrid perovskites in solar cell applications.

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Section: Introductionmentioning

confidence: 97%

Atomic scale insights into structure instability and decomposition pathway of methylammonium lead iodide perovskite

et al. 2018

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“…Their process allowed for the formation of crystals of a range of habits and sizes. Recently, Kollek et al have reported a novel single-precursor route for the preparation of a range of nanostructures including porous, shape-anisotropic single crystals via crystal-to-crystal transformation16.…”

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confidence: 99%

“…Reported formations of CH 3 NH 3 PbX 3 (x = Cl, Br, I) include nanowires18, size-controlled cuboids on mesoporous substrates19, freestanding crystals121315 and freestanding nanoparticles1620.…”

mentioning

confidence: 99%

Facile route to freestanding CH3NH3PbI3 crystals using inverse solubility

Kadro

Nonomura

Gachet

et al. 2015

Sci Rep

116

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CH3NH3PbI3 was found to exhibit inverse solubility at high temperatures in γ-butyrolactone. Making use of this unusual, so far unreported phenomenon, we present a facile method for the growth of freestanding crystals of CH3NH3PbI3 from solution without addition of any capping agents or seed particles. Large, strongly faceted crystals could be grown within minutes. This finding may aid in understanding the crystallization process of CH3NH3PbI3 from solution that may lead to improved morphological control of film deposition for a range of device architectures. Our process offers a facile and rapid route to freestanding crystals for use in a broad range of characterization techniques.

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“…Although these nanocrystals showed size controllability and did not use a surfactant ligand, they could not be used in LEDs because they need a nanoporous hard template such as Al 2 O 3 or TiO 2 (42,75). For application to LEDs and other optoelectronics, colloidal NPs synthesized by solution reaction were demonstrated.…”

Section: Next-generation Emitters: Perovskite Nanoparticle Technologymentioning

confidence: 99%

Metal halide perovskite light emitters

Kim

Cho

Lee

2016

Proc. Natl. Acad. Sci. U.S.A.

474

427

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Twenty years after layer-type metal halide perovskites were successfully developed, 3D metal halide perovskites (shortly, perovskites) were recently rediscovered and are attracting multidisciplinary interest from physicists, chemists, and material engineers. Perovskites have a crystal structure composed of five atoms per unit cell (ABX 3 ) with cation A positioned at a corner, metal cation B at the center, and halide anion X at the center of six planes and unique optoelectronic properties determined by the crystal structure. Because of very narrow spectra (full width at half-maximum ≤20 nm), which are insensitive to the crystallite/grain/particle dimension and wide wavelength range (400 nm ≤ λ ≤ 780 nm), perovskites are expected to be promising high-color purity light emitters that overcome inherent problems of conventional organic and inorganic quantum dot emitters. Within the last 2 y, perovskites have already demonstrated their great potential in light-emitting diodes by showing high electroluminescence efficiency comparable to those of organic and quantum dot light-emitting diodes. This article reviews the progress of perovskite emitters in two directions of bulk perovskite polycrystalline films and perovskite nanoparticles, describes current challenges, and suggests future research directions for researchers to encourage them to collaborate and to make a synergetic effect in this rapidly emerging multidisciplinary field.As human civilization went through the information revolution, display technology has been designated as a core technology to increase convenience in daily human life. In an information society, the desire of humans to see the materials more vividly in displays has significantly increased. In this aspect, major trend of the display technology is changing from high resolution and high efficiency to high color purity for realizing vivid natural colors (Fig. 1). Therefore, research on new emitting materials that can emit light with narrow full width at halfmaximum (FWHM) have been attempted. Inorganic quantum dot (QD) emitters with narrow spectra (FWHM ∼30 nm) have been significantly studied following organic emitters (FWHM >40 nm); however, size-sensitive color purity, difficult size uniformity control, and expensive material costs of inorganic QD emitters retard the progress for wide use in industry. Therefore, new emitters with size-insensitively high color purity (FWHM <20 nm) and low material cost should be developed. Among many candidates, metal halide perovskites (hereafter, "perovskites") have gained great attentions and shown the possibility for future high-color purity emitters.The first perovskites were layer-type thin films (A 2 MX 4 ) (A = organic cation; M = divalent metal; X = Cl, Br, I) (1-6).They were expected to be novel hybrid materials that had both advantages of organic materials (e.g., solution processability and low material costs) and inorganic materials (e.g., high charge carrier mobility) (7). Especially, perovskites with high color purity, easy wavelength tuning, and ...

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Porous and Shape‐Anisotropic Single Crystals of the Semiconductor Perovskite CH₃NH₃PbI₃ from a Single‐Source Precursor

Cited by 56 publications

References 37 publications

Atomic scale insights into structure instability and decomposition pathway of methylammonium lead iodide perovskite

Atomic scale insights into structure instability and decomposition pathway of methylammonium lead iodide perovskite

Facile route to freestanding CH3NH3PbI3 crystals using inverse solubility

Metal halide perovskite light emitters

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