Maximizing the emissive properties of CH3NH3PbBr3 perovskite nanoparticles

González‐Carrero, Soranyel; Galian, Raquel E.; Pérez‐Prieto, Julia

doi:10.1039/c4ta05878j

Cited by 318 publications

(287 citation statements)

References 33 publications

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“…The PLQY was further enhanced to 83% by fine-tuning the molar ratio between the precursors (MABr, PbBr) and the ligand (OABr and ODE). [57] In addition, an alkyl-amine-assisted precipitation approach was introduced to prepare mixed-halide perovskite MAPbX 3 QDs with various Br/I and Br/Cl conditions, which featured an exciton binding energy of ≈375 meV, and an optical phonon energy of ≈42 meV. [58] The absorption and photoluminescence (PL) spectra were tunable from 400 to 750 nm by changing the halide ion composition, and the prepared materials exhibit high color saturation due to the relatively narrow emission line widths full-width-half-maximum (FWHM = 20-50 nm).…”

Section: D Perovskite: Quantum Dots (Qds)mentioning

confidence: 99%

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Yusoff

Nazeeruddin

2017

Advanced Energy Materials

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ruthenium molecular dye, wide absorption range, direct and tunable bandgaps, superior charge carrier mobility, and long carrier diffusion length. [6,[43][44][45] Although it has been synthesized for over 100 years, Mitzi et al. were the first to investigate the electrical properties of tin-based perovskite in 1994, [46] which was later used in numerous devices, including field effect transistors (FETs) and LEDs. [47][48][49] The attention toward metal halide perovskites sparked yet again in 2009, [42] and they were later named one of the most promising emerging technologies in 2016. In brief, metal halide perovskites can be divided into two types based on their crystal structure motif: (i) 3D-structured perovskite (AMX 3 ) and (ii) 2D-structured perovskite (A 2 MX 4 ). The structure of the perovskite could either be 2D or 3D, while the dimensions of the perovskite probably belong to 0D-3D. The term "perovskite" implies to the general class of materials derived from an elemental composition of AMX 3 and demonstrates the crystal structure of perovskite crystal CaTiO 3 , where the divalent metal M resides at the body center and surrounded by six X-anions located at the face centers in an octahedral cluster. The MX 6 in the octahedral cluster may form an extended 3D structure by all-corner-connected type with A-cation sitting at the center. It could also form a 2D perovskite when the 3D perovskite network is cut into one-layer-thick slices along the 〈100〉 direction and separates them apart. In principle, 2D perovskite is the easiest to synthesize because of its natural layered structure, which is held together by weak van der Waals forces. Dou et al. reported the large-scale synthesis of the monolayer (C 4 H 9 NH 3 ) 2 -PbBr 4 by a chemical method. [50] Along the same lines, several groups have prepared and characterized nanomaterials composed of various forms of perovskites. [51][52][53] Also, our group has recently successfully prepared a low-dimensional mixed 2D/3D perovskite using the protonated salt of amino valeric acid iodide (AVAI) as an organic precursor mixed with PbI 2 , in which a yellowish film was containing needle-like crystallite formed. [54] In this topical review, we present the latest advances in the synthesis of low-dimensional perovskites and the growth mechanism to develop a strategy to achieve best performing devices. Later, we focus the instability and a cost-effective solution to circumvent this problem, which is vital for the eventual deployment of perovskite solar cells to consumers market. We present an analysis of the origins for instability in perovskite solar cells, and present a summary of the main achievements and possible future developments of these low-dimensional perovskite. [2,55] Perovskite solar cells have been heralded as one of the most promising emerging technologies in 2016 because of the very high power conversion efficiency of 22% and the low cost of generating electricity compared to even fossil fuels. These are formed with various dimensionalities and can be fully mani...

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Section: D Perovskite: Quantum Dots (Qds)mentioning

confidence: 99%

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Yusoff

Nazeeruddin

2017

Advanced Energy Materials

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“…19 Additionally, the interdigitation of octadecene molecules was reported to increase stability and emission properties of organohalide perovskite NCs. 25 This raised the hope that an enforced ligand sphere is able to enhance the stability of inorganic perovskite NCs.…”

Section: Introductionmentioning

confidence: 99%

Polymer-Enhanced Stability of Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs

Meyns

Perálvarez

Heuer‐Jungemann

et al. 2016

ACS Appl. Mater. Interfaces

302

229

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Cesium lead halide (CsPbX 3 , X = Cl, Br, I) nanocrystals (NCs) offer exceptional optical properties for several potential applications but their implementation is hindered by a low chemical and structural stability and limited processability. In the present work, we developed a new method to efficiently coat CsPbX 3 NCs, which resulted in their increased chemical and optical stability as well as processability. The method is based on the incorporation of poly(maleic anhydride-alt-1-octadecene) (PMA) into the synthesis of the perovskite NCs. The presence of PMA in the ligand shell stabilizes the NCs by tightening the ligand binding, limiting in this way the NC surface interaction with the surrounding media. We further show that these NCs can be embedded in self-standing silicone/glass plates as down-conversion filters for the fabrication of monochromatic green and white light emitting diodes (LEDs) with narrow bandwidths and appealing color characteristics.

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“…[25][26][27] Recent studies have shown that colloidal perovskite nanocrystals (NCs) can exhibit very high photoluminescence quantum yields (PL QY). [23][24][25][28][29][30] Moreover, they show strong quantum confinement effects when their dimensionality changes from 3D to 2D, offering additional tunability of optical properties. Perovskite NCs have already shown great promise in many applications such as lasers, LEDs and photovoltaic devices.…”

Section: Introductionmentioning

confidence: 99%

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

et al. 2016

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Lead halide perovskite nanocrystals (NCs) are receiving a lot of attention nowadays, due to their exceptionally high photoluminescence quantum yields reaching almost 100% and tunability of their optical band gap over the entire visible spectral range by modifying composition or dimensionality/size. We review recent developments in the direct synthesis and ion exchange-based reactions, leading to hybrid organic-inorganic (CH 3 NH 3 PbX 3 ) and all-inorganic (CsPbX 3 ) lead halide (X = Cl, Br, I) perovskite NCs, and consider their optical properties related to quantum confinement effects, single emission spectroscopy and lasing. We summarize recent developments on perovskite NCs employed as an active material in several applications such as light-emitting devices, solar cells and photodetectors, and provide a critical outlook into the existing and future challenges.

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Maximizing the emissive properties of CH₃NH₃PbBr₃ perovskite nanoparticles

Abstract: Highly luminescent and photostable CH3NH3PbBr3 nanoparticles have been prepared by fine-tuning the molar ratio between CH3NH3Br, PbBr2, a medium-size alkyl-chain ammonium salt, and 1-octadecene.

Cited by 318 publications

References 33 publications

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Low‐Dimensional Perovskites: From Synthesis to Stability in Perovskite Solar Cells

Polymer-Enhanced Stability of Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

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