A new inorganic-organic hybrid halide perovskite thin film based ammonia sensor

Gupta, Nishi; Nanda, Omita; Grover, Rakhi; Saxena, Kanchan

doi:10.1016/j.orgel.2018.04.015

Cited by 30 publications

(12 citation statements)

References 21 publications

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“…MA is a polar organic cation, and different orientations in the inorganic cage have certain influences on the system energy, lattice constant, and band gap ( E g ); therefore, these physical quantities can be fine-tuned. − However, such 3D perovskite materials are limited in their commercial application due to their low stability under wetness or high temperature conditions. , In contrast, 2D organic–inorganic hybrid perovskites have recently become a promising alternative due to their excellent environmental stability. − 2D perovskites have a typical structural formula of M 2 BX 4 , where M is a long-chain organic cation such as butylammonium (BA), phenylethylammonium (PEA), polyethylenimine (PEI), cyclopropylamine (CA), or octadecylamine (OA). ,− The presence of a long-chain organic cation layer enhances the stability of the compound to temperature and humidity but also results in a high band gap; the bandgaps for (CH 3 (CH 2 ) 3 NH 3 ) 2 PbI 4 and (CH 3 (CH 2 ) 3 NH 3 ) 2 (CH 3 NH 3 )Pb 2 I 7 as calculated by Stoumpos et al are 2.43 and 2.17 eV, respectively . The wide band gap and the low carrier transfer capacity lead to low energy conversion efficiency, which limits the application of 2D perovskite materials in the photovoltaic field. , In addition, the use of long-chain diamino organic cations in the field of optoelectronics is becoming increasingly popular. − The introduction of functionalized diamino organic cations makes the perovskite materials more stable to obtain better photoelectric properties and applications. Because diamino halide is as common and easy to obtain as monoamine halide, it is very feasible to obtain diamino perovskites in experiment and its practical application.…”

Section: Introductionmentioning

confidence: 99%

Influence of Functional Diamino Organic Cations on the Stability, Electronic Structure, and Carrier Transport Properties of Three-Dimensional Hybrid Halide Perovskite

Zhang

Liu

et al. 2020

J. Phys. Chem. C

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In recent years, organic−inorganic hybrid halide perovskites have attracted wide attention due to their excellent photoelectric properties. MAPbI 3 and FAPbI 3 have particularly shown great application prospects. However, due to the low thermal and chemical stability of these monoamino organic cation 3D perovskites, the durability of the devices in which they are used is affected. In this paper, an inorganic skeleton was introduced to functional diamino organic cations (PDA and DAB) to obtain more stable diamino 3D perovskites (PDAPbI 4 and DABPbI 4 ). For comparison with the 3D perovskites, two monoamino perovskites with the same molecular chain length ((PT) 2 PbI 4 and (MBA) 2 PbI 4 ) were also designed. The geometrical structures, thermodynamic stability, electronic properties, transport properties, and optical absorption properties of the four perovskites were calculated by the first-principles method. The results demonstrate that diamino organic cations can, to a certain extent, provide favorable channels for carrier migration, especially for carrier migration between Pb−I inorganic layers, and increase the coupling effect between Pb−I inorganic layers. In addition, the excellent optical absorption properties of diamino organic cation 3D perovskites in the solar irradiation range can contribute to the design and synthesis of more effective and stable organic−inorganic perovskite optoelectronic devices in the future.

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Section: Introductionmentioning

confidence: 99%

Influence of Functional Diamino Organic Cations on the Stability, Electronic Structure, and Carrier Transport Properties of Three-Dimensional Hybrid Halide Perovskite

Zhang

Liu

et al. 2020

J. Phys. Chem. C

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“…Their extraordinary optoelectronic properties and solution processability can potentially lead to large area and high‐performance devices at a low cost. In parallel, using halide perovskites for detecting various gases and chemical species has been studied including oxygen, ozone, acetone, ethanol, ammonia, and explosive nitroaromatics …”

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confidence: 99%

Porous Halide Perovskite–Polymer Nanocomposites for Explosive Detection with a High Sensitivity

Shan

Zhang

Zhou

et al. 2018

Adv Materials Inter

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a field-based environment, is critical for homeland security and public safety.In practice, trained canines and spectroscopic techniques have both been used to detect explosive chemicals. However, trained canines are expensive. They can also be fatigued and are not suitable for continuous monitoring. [15] Ion mobility spectrometry has been one of the most used commercial spectroscopic tools to detect explosive chemi cals. [16] It has a high sensitivity ranging from picograms to nanograms. [16] However, due to its high cost and large size, it is usually used in a stationary setting such as a security checkpoint. Alternatively, fluorescence-based explosive detection can be applied in-field at a relatively low cost. The detection mechanism is based on fluorescence quenching of the fluorophores after absorbing particles and/or vapors of the explosives. [17] Trace amount detection has been realized in literature using conjugated polymers, [18,19] metal-organic frameworks (MOFs), [20] and luminescent quantum dots (QDs), [21] etc. as the fluorophores. Very recently, halide perovskites have also been studied as new alternative fluorophores. For instance, Aamir et al. prepared cesium lead bromoiodide (CsPbBr 2 I) microcrystals in dimethylformamide (DMF) and demonstrated their use for detecting nitrophenol explosives. [12] Muthu et al. used methylammonium lead tribromide (MAPbBr 3 ) nanoparticles in toluene and reported their photoluminescence (PL) quenching characteristics by adding 2,4,6-trinitrophenol. [11] Halide perovskites have the advantage of an easier synthesis process at room temperature and exhibit more intense fluorescence due to their ultrahigh PL quantum yield compared to conjugated polymers, MOFs, and luminescent QDs fluorophores. Furthermore, previous reports used suspensions of halide perovskite particles in a solvent. In a humid environment, these perovskites will inevitably undergo composition degradation and fluorescence decrease, thus leading to false responses in a field detection. [22] In this work, we report porous nanocomposites consisting of MAPbBr 3 nanocrystals embedded in a poly(vinylidene fluoride) (PVDF) polymer matrix. The composites have a pore size of 2-10 µm and a wall thickness of hundreds of nanometers. The high porosity facilitates the diffusion process of explosive chemicals to the fluorescent perovskite nanocrystals, and the hydrophobic PVDF polymer matrix inhibits the penetration of water and alcohol molecules into the composites. As a result, the nanocomposites show no fluorescence degradation upon A porous halide perovskite-polymer nanocomposite is developed using a freeze-drying process. Such a composite shows strong fluorescence quenching after exposure to explosive nitroaromatics, nitroamines, and nitrate esters with a sensitivity of a few nanograms. In addition, this composite is robust against moisture and solvents, showing negligible change in fluorescence intensities after submersion in water, alcohol, and acid, base, and salt solutions. Transient absorption spectroscopy st...

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“…Since then, the detection limit of O 2 concentration has been reduced to as low as 70 ppm based on CH 3 NH 3 PbI 3 films, while CH 3 NH 3 PbI 3– x Cl x has been proved to be able to detect an ultralow ozone concentration of few ppb . These typical experiments have proved the extraordinary sensitivity of the perovskite materials to gases with different reductive or oxidative properties. − Differing from the application in solar cells, the range for designing stable perovskite materials for gas sensing can break through the strict limitations on band gaps of photovoltaic materials and hence the interest in the development of such perovskite materials has been triggered.…”

Section: Introductionmentioning

confidence: 99%

Sensing Mechanism of H₂O, NH₃, and O₂ on the Stability-Improved Cs₂Pb(SCN)₂Br₂ Surface: A Quantum Dynamics Investigation

et al. 2021

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Although the perovskite sensing materials have shown high sensitivity and ideal selectivity toward neutral, oxidative, or reductive gases, their structural instability hampers the practical application. To exploit perovskite-based gas-sensing materials with improved stability and decent sensitivity, three adsorption complexes of H2O, NH3, and O2 on the Cs2Pb(SCN)2Br2 surface are built by doping Br– and Cs+ in the parent (CH3NH3)2Pb(SCN)2I2 structure and submitted to quantum dynamics simulations. Changes in the semiconductor material geometric structures during these dynamic processes are analyzed and adsorption ability and charge transfer between Cs2Pb(SCN)2Br2 and the gas molecules are explored so as to further establish a correlation between the geometrical structure variations and the charge transfer. By comparing with the previous CH3NH3PbI3 and (CH3NH3)2Pb(SCN)2I2 adsorption systems, we propose the key factors that enhance the stability of perovskite structures in different atmospheres. The current work is expected to provide clues for developing innovative perovskite sensing materials or for constructing reasonable sensing mechanisms.

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A new inorganic-organic hybrid halide perovskite thin film based ammonia sensor

Cited by 30 publications

References 21 publications

Influence of Functional Diamino Organic Cations on the Stability, Electronic Structure, and Carrier Transport Properties of Three-Dimensional Hybrid Halide Perovskite

Influence of Functional Diamino Organic Cations on the Stability, Electronic Structure, and Carrier Transport Properties of Three-Dimensional Hybrid Halide Perovskite

Porous Halide Perovskite–Polymer Nanocomposites for Explosive Detection with a High Sensitivity

Sensing Mechanism of H₂O, NH₃, and O₂ on the Stability-Improved Cs₂Pb(SCN)₂Br₂ Surface: A Quantum Dynamics Investigation

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A new inorganic-organic hybrid halide perovskite thin film based ammonia sensor

Cited by 30 publications

References 21 publications

Influence of Functional Diamino Organic Cations on the Stability, Electronic Structure, and Carrier Transport Properties of Three-Dimensional Hybrid Halide Perovskite

Influence of Functional Diamino Organic Cations on the Stability, Electronic Structure, and Carrier Transport Properties of Three-Dimensional Hybrid Halide Perovskite

Porous Halide Perovskite–Polymer Nanocomposites for Explosive Detection with a High Sensitivity

Sensing Mechanism of H2O, NH3, and O2 on the Stability-Improved Cs2Pb(SCN)2Br2 Surface: A Quantum Dynamics Investigation

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Sensing Mechanism of H₂O, NH₃, and O₂ on the Stability-Improved Cs₂Pb(SCN)₂Br₂ Surface: A Quantum Dynamics Investigation