Luminescent hybrid perovskite nanoparticles as a new platform for selective detection of 2,4,6-trinitrophenol

Muthu, Chinnadurai; Nagamma, Sunena R.; Vijayakumar, Chakkooth

doi:10.1039/c4ra07884e

Cited by 72 publications

(62 citation statements)

References 25 publications

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“…This results in planar heterojunction solar cells exhibiting power-conversion efficiencies approaching 7%, with good prospects for using FAPbBr 3 in solar cells with wide-band-gap absorbers [17]. As predicted, FAPbI 3 -based perovskite solar cells with maximum power-conversion efficiency greater than 20% have been recently reported [18], and bromide hybrid perovskites have been also employed for sensor applications [11].…”

Section: Introductionmentioning

confidence: 86%

“…In fact, in the last 3 years they have demonstrated an unprecedented portfolio of successes in applications such as efficient and affordable solar cells [1][2][3][4][5], optoelectronics and lasing devices [6][7][8][9], sensors [10,11], and tandem solar electrochemical water-splitting cells [12], just to name few. The quest for high photovoltaic efficiencies combined with solid structural stability, cheap fabrication processes, and, most importantly, environmentally friendly chemical compositions [13] have motivated the development of sophisticated synthesis and preparation strategies for this class of materials.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the cation dynamics in lead-bromide hybrid perovskites

2016

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Density functional theory including a many-body treatment of dispersive forces is used to describe the interplay between structure and electronic properties of two prototypical Br-based hybrid perovskites, namely, CH 3 NH 3 PbBr 3 and HC(NH 2 ) 2 PbBr 3 . We find that, like for some of their iodine-based counterparts, the molecules' orientation plays a crucial role in determining the shape of both the conduction and valence bands around the band edges. This is mostly evident in the case of CH 3 NH 3 PbBr 3 , which is a direct band-gap semiconductor when the CH 3 NH 3 group is oriented along the (111) direction but turns indirect when the orientation is (100). We have constructed a simple dipole model, with parameters all evaluated from ab initio calculations, to describe the molecules' depolarization dynamics. We find that, once the molecules are initially orientated along a given high-symmetry direction, their room-temperature depolarization depends on the specific material investigated. In particular we find that the ratio between the polarization decay constant of CH 3 NH 3 PbBr 3 and that of HC(NH 2 ) 2 PbBr 3 is about 2 at room temperature. With these results at hand we suggest a simple luminescence decay experiment to prove our findings and establish a correlation between optical activity and the molecules' dynamics in these materials.

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Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Exploring the cation dynamics in lead-bromide hybrid perovskites

2016

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“…Although there are several materials available for the detection of nitroaromatic explosives, the development of sensitive and real time, stable analytes for the detection of TNP and other nitroaromatic materials remains a challenge . Recently, hybrid perovskite materials have been reported as probes for the florescent sensing of TNP . However, thermal instability limits the application of this material.…”

Section: Introductionmentioning

confidence: 99%

A Facile Route to Cesium Lead Bromoiodide Perovskite Microcrystals and Their Potential Application as Sensors for Nitrophenol Explosives

et al. 2017

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To achieve a material with pure phase and crystallinity, the use of antisolvents is found to be crucial. Herein, we report the synthesis of phase‐pure CsPbBr2I microcrystals with defined morphologies by using trioctylphosphine (TOP) as an antisolvent and capping agent. The as‐prepared inorganic perovskite has enhanced thermal stability and promising optical properties, displaying a band gap of 2.2 eV. The photoluminescence (PL) studies suggest high sensitivity of the as‐prepared inorganic perovskites against nitrophenols, which makes them a potential candidate for the detection of nitrophenol.

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“…44 Luo et al 45 used either octylammonium bromide or octadecylammonium bromide to produce perovskite NCs of 3.9 or 6.5 nm size, respectively, by means of the reprecipitation method. Although no mechanism for the size control was provided, we anticipate that the difference in size of NCs with different ligands was caused by their difference in ligand binding kinetics.…”

Section: Synthesis Of Perovskite Ncsmentioning

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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Luminescent hybrid perovskite nanoparticles as a new platform for selective detection of 2,4,6-trinitrophenol

Abstract: CH3NH3PbBr3based luminescent perovskite nanoparticles have been used for the selective detection of an explosive, 2,4,6-trinitrophenol (picric acid) with high sensitivity in solution and vapour state.

Cited by 72 publications

References 25 publications

Exploring the cation dynamics in lead-bromide hybrid perovskites

Exploring the cation dynamics in lead-bromide hybrid perovskites

A Facile Route to Cesium Lead Bromoiodide Perovskite Microcrystals and Their Potential Application as Sensors for Nitrophenol Explosives

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

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