Facile Synthesis of FAPbI3 Nanorods

Huang, He; Wu, Linzhong; Wang, Yiou; Richter, A.; Döblinger, Markus; Feldmann, Jochen

doi:10.3390/nano10010072

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…This result can be attributed to the better NW crystal growth and center-of-mass confinement in the nanoporous AAO, which increases the radiative carrier recombination and leads to the significantly amplified PL emission. The quantum yield of perovskite NWs within the AAO were obtained to be 30%, which is comparable with perovskite NWs and nanorods in other reports as shown in Table S2 [ [59][60][61][62][63].…”

Section: Printed Perovskite Nws For Wide Color Gamut Phosphorssupporting

confidence: 85%

Designed growth and patterning of perovskite nanowires for lasing and wide color gamut phosphors with long-term stability

Lin

Zhang

et al. 2020

Nano Energy

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Section: Printed Perovskite Nws For Wide Color Gamut Phosphorssupporting

confidence: 85%

Designed growth and patterning of perovskite nanowires for lasing and wide color gamut phosphors with long-term stability

Lin

Zhang

et al. 2020

Nano Energy

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“…Since then, methods such as precipitation, hot-injection, and sonication have been developed in the field. Nowadays, a well-established hot-injection method allows the preparation of high-quality NCs, − especially all-inorganic CsPbX 3 perovskites, with various morphologies including nanorods, nanowires, and nanoplatelets. ,− Although enormous progress has been made in the synthesis, the detailed formation mechanism of metal halide perovskite NCs stays unclear owing to their rather low formation energy and a fast crystallization rate, which are challenging to characterize and analyze. Some studies have attempted to discuss the synthetic mechanism of perovskite NCs .…”

Section: Introductionmentioning

confidence: 99%

Growth of Perovskite CsPbBr₃ Nanocrystals and Their Formed Superstructures Revealed by In Situ Spectroscopy

et al. 2020

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Metal halide perovskites have attracted substantial interest because of their promising properties for optoelectronic applications. Despite much progress made in the field, the exact growth mechanism of perovskite nanocrystals (e.g., CsPbBr 3 ) remains elusive and further improvement of their controllable synthesis is challenging. Herein, we point out different phenomena during the processes of growth, cooling, and purification of high-quality CsPbBr 3 nanocrystals using in situ photoluminescence spectroscopy. The as-synthesized materials have been further characterized by timeresolved transient differential transmission and photoluminescence spectroscopies. Using X-ray scattering, we confirm that nanocrystals form superstructures during the process of cooling already in dispersion, which is frequently ignored. The purification process is explained using a proposed model based on the self-size-selection. On the one hand, such superstructures pave a potential pathway to the fabrication of highquality devices such as light-emitting devices. On the other hand, the approach to reveal their formation process benefits the comparison and understanding of the difference between nanocrystals and supercrystals. The fact that superstructures form already during synthesis may also apply to the different perovskite systems and thus help to improve the quality of the as-prepared nanocrystals.

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“…A similar strategy has been employed by Huang et al. [ 25 ] who reported the synthesis of FAPbI 3 NRs by controlling the concentration of formamidine. A high concentration of formamidine favors anisotropic growth of FAPbI 3 NCs and leads to confinement of growth in two directions, resulting in elongated NRs.…”

Section: Growth Mechanisms Of Perovskite Nanorodsmentioning

confidence: 99%

Metal Halide Perovskite Nanorods: Shape Matters

et al. 2020

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have a soft and ionic lattice. [3] Such ionic nature makes it possible to conduct anion exchange reactions from one kind of perovskite NCs, for example CsPbBr 3 , to another and thus achieve particles with different compositions such as CsPbCl 3 , CsPbI 3 , and their mixed-anion alloys, which is changing to accomplish for conventional semiconductor NCs. This enables bandgap tuning over the whole visible and even near-infrared spectral ranges while maintaining the size and morphology of the resulting NCs. [4] However, their ionic nature also makes the growth rates of perovskites extremely fast, with a completion of the NC growth ranging from less than a second to a couple of seconds. [5] The fast growth rate makes it difficult to control the final shape of perovskite NCs, [6] which will be elaborated upon in detail in this article further below. Useful properties of 1D semiconductor nanorods (NRs) including linearly polarized light emission, reduced lasing threshold, and improved charge transport [6] make them stand out from semiconductor NCs of other morphologies in a variety of applications such as liquid crystal displays (LCDs), lasers, solar cells and photocatalysis. [7] For example, aligned CdSe/CdS NRs incorporated in thin polymer films have been proposed as optical enhancement films to improve the brightness and broaden the color gamut of LCDs. [7b-d] In addition, CdSe/CdS, alloyed CdSe x S 1−x and CsPbBr 3 NRs have demonstrated a relatively low amplified spontaneous emission (ASE) threshold and a high net optical gain at a medium or low pump intensity, making them capable of producing lasing with low pumping thresholds. [7a,8] Furthermore, the 1D character of semiconductor NRs benefits efficient charge separation and provides specific spatial locations for selective deposition of other materials to realize 1D heterostructures, with prominent potentials in optoelectronics and photocatalysis. [9] Although there are a few documented attempts for the controlled chemical growth of perovskite NRs, [6b,7a,10] research into this area is still in its infancy. A high-degree of control during the synthesis of perovskite NRs in terms of size, aspect ratio, and performance, is not yet been fully realized. It is desirable to develop facile, robust, and scalable synthetic strategies for the preparation of high-quality perovskite NRs, to enrich the existing knowledge of their growth mechanisms, and to improve their optical and electronic properties that underpin their future applications. Quasi-1D metal halide perovskite nanorods (NRs) are emerging as a type of materials with remarkable optical and electronic properties. Research into this field is rapidly expanding and growing in the past several years, with significant advances in both mechanistic studies of their growth and widespread possible applications. Here, the recent advances in 1D metal halide perovskite nanocrystals (NCs) are reviewed, with a particular emphasis on NRs. At first, the crystal structures of perovskites are elaborated, which is followed by a revi...

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Facile Synthesis of FAPbI3 Nanorods

Cited by 6 publications

References 19 publications

Designed growth and patterning of perovskite nanowires for lasing and wide color gamut phosphors with long-term stability

Designed growth and patterning of perovskite nanowires for lasing and wide color gamut phosphors with long-term stability

Growth of Perovskite CsPbBr₃ Nanocrystals and Their Formed Superstructures Revealed by In Situ Spectroscopy

Metal Halide Perovskite Nanorods: Shape Matters

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Facile Synthesis of FAPbI3 Nanorods

Cited by 6 publications

References 19 publications

Designed growth and patterning of perovskite nanowires for lasing and wide color gamut phosphors with long-term stability

Designed growth and patterning of perovskite nanowires for lasing and wide color gamut phosphors with long-term stability

Growth of Perovskite CsPbBr3 Nanocrystals and Their Formed Superstructures Revealed by In Situ Spectroscopy

Metal Halide Perovskite Nanorods: Shape Matters

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Growth of Perovskite CsPbBr₃ Nanocrystals and Their Formed Superstructures Revealed by In Situ Spectroscopy