A “Turn-on” fluorescence perovskite sensor based on MAPbBr3/mesoporous TiO2 for NH3 and amine vapor detections

Li, Guishun; She, Changkun; Zhang, Yu; Li, Hongkai; Liu, Shaohua; Yue, Fangyu; Jing, Chengbin; Cheng, Ya; Chu, Junhao

doi:10.1016/j.snb.2020.128918

Cited by 38 publications

(17 citation statements)

References 68 publications

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“…The relevant data are summarized in Table S5, and the respective time decay curves, fits, and residuals are presented in Figures S7–S11 (Supporting Information). Despite several reports in the literature showing a biexponential decay behavior for the perovskite NCs in solution ,, or in the film, , with short- and long-lived PL lifetimes, the studied samples could be fitted by a monoexponential decay, as already observed in these NCs. , The fluorescence decay profile of the MAPbBr 3 –HDA film could be fitted with good χ 2 values, showing a fast decay (∼5 ns), but surprisingly, decreases to around 0.1 ns with PLla. It is worth mentioning that the amount of the polymer does not affect the excited-state dynamics of these NCs.…”

Section: Resultsmentioning

confidence: 73%

Highly Water-Stable Polymer–Perovskite Nanocomposites

Carrizo

Belmonte

Santos

et al. 2021

ACS Appl. Mater. Interfaces

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The excellent performance of hybrid metal-halide perovskite nanocrystals (NCs) contrasts with their unsatisfactory stability in a high-humidity environment or water. Herein, polymer composite lead-halide perovskites (LHPs) NCs were prepared by casting or spin-coating to produce a high fluorescence yield and a fully water-resistant material. Poly(L-lactide) (PLla), polypropylene glycol (PPGly), and polysulfone (PSU) commercial polymers were used to prepare suspensions of MAPbBr 3 −HDA NCs (MA: CH 3 NH 3 ; HDA: hexadecylamine). The MAPbBr 3 −HDA@PLla suspension exhibited a maximum fluorescence quantum yield of 93% compared to 43% for the pristine MAPbBr 3 −HDA NCs. Strong emissions around 528 nm were also observed, with the same full width at half maximum value of 20 nm, demonstrating the successful fabrication of brightly luminescent LHP NCs@polymer combinations. Time-resolved photoluminescence measurements directly observed the enhanced spontaneous emission of the NCs induced by the polymeric environment. However, the cast films of MAPbBr 3 −HDA NCs mixed with PLla or PPGly did not resist water immersion. On the contrary, MAPbBr 3 −HDA@PPGly/PSU films containing well-dispersed ∼10 nm LHP NCs retained a bright green fluorescence emission even after 18 months under air conditions or water immersion up to 45 °C. From water contact angle measurements, profilometry, and X-ray photoelectron spectroscopy data, it could be assumed that the slightly hydrophobic PSU polymer is responsible for the high water stability of the fluorescent films, which avoids MAPbBr 3 −HDA NC degradation. This work shows that the LHP NC dispersion in dissolved commodity polymers holds great promise toward the long-term stability of LHP NC composites for the future development of wearable electronic devices and other waterproof applications.

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Section: Resultsmentioning

confidence: 73%

Highly Water-Stable Polymer–Perovskite Nanocomposites

Carrizo

Belmonte

Santos

et al. 2021

ACS Appl. Mater. Interfaces

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“…Metal halide perovskite nanocrystals and single crystals have been demonstrated to act as optical O 2 sensors based on the change in their PL intensity and lifetime upon exposure to the gas. [173][174][175] The physisorption of the gas molecules could extensively control the surface trap state density in the case of MAPbBr 3 single crystals, resulting in a variation in the PL intensity by twice that of the initial intensity. 164 Mn II -Doped CsPbCl 3 nanocrystals displayed PL quenching by 53% and degradation in lifetime upon exposure to 0-100% O 2 (Fig.…”

Section: Limit Of Detection (Lod)mentioning

confidence: 99%

A review on the sensing mechanisms and recent developments on metal halide-based perovskite gas sensors

2022

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“…The phase transformation was later studied by a variety of in situ spectroscopic analyses to investigate the interactions between CH 3 NH 3 PbI 3 and polar molecules . The electrical resistance properties of MHPs have also been studied to achieve NH 3 sensing based on a four-probe method or a two-electrode configuration. , Very few fluorescence probes have been studied to investigate the NH 3 sensing based on metal halide materials. − The reported examples either have a high limit of detection (LOD) for NH 3 concentrations or are perovskite quantum dots that are air-unstable and susceptible to aggregate under ambient conditions. , Therefore, it still remains a great challenge to use organometal halide materials as a highly sensitive, selective, and long-term stable fluorescence probe for NH 3 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Robust and Porous Lead Chloride-Based Metal–Organic Frameworks toward a Selective and Sensitive Smart NH₃ Sensor

Chen

Yang

et al. 2021

ACS Appl. Mater. Interfaces

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Organolead halide materials have shown promising optoelectronic properties that are suitable for light-emitting diodes (e.g., strong photoluminescence, narrow emission width, and high charge carrier mobility). However, the vast majority of them have no open porosity or open metal sites for host−guest interactions and are therefore not widely applicable in intrinsic fluorescent sensing of small molecules. Herein, we report a lead chloride-based metal−organic framework (MOF) with high porosity and stability and promising photoluminescent characteristics, performing as a sensitive, selective, and long-term stable fluorescence probe for NH 3 . For the first time, a homemade dynamic realtime photoluminescence monitoring system was developed, which showed that our haloplumbate-based MOF has an immediate response and an extremely low limit of detection (12 ppm) toward NH 3 . A variety of experimental characterization and theoretical calculations evidenced that the photoluminescence quenching was ascribed to the coordination between NH 3 guests and exposed Pb 2+ centers in MOFs. Moreover, a portable on-site smart NH 3 detector was designed based on this haloplumbate-MOF using a 3D printer, and the quantitative recovery experiment demonstrated the effective detection of NH 3 in the range of 15−150 ppm. This study opens a new pathway to design organolead halide-based MOFs to perform on-site chemical sensing of small molecules and shows their high potential to monitor safety concentrations of NH 3 in different industrial sites.

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A “Turn-on” fluorescence perovskite sensor based on MAPbBr3/mesoporous TiO2 for NH3 and amine vapor detections

Cited by 38 publications

References 68 publications

Highly Water-Stable Polymer–Perovskite Nanocomposites

Highly Water-Stable Polymer–Perovskite Nanocomposites

A review on the sensing mechanisms and recent developments on metal halide-based perovskite gas sensors

Fabrication of Robust and Porous Lead Chloride-Based Metal–Organic Frameworks toward a Selective and Sensitive Smart NH₃ Sensor

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A “Turn-on” fluorescence perovskite sensor based on MAPbBr3/mesoporous TiO2 for NH3 and amine vapor detections

Cited by 38 publications

References 68 publications

Highly Water-Stable Polymer–Perovskite Nanocomposites

Highly Water-Stable Polymer–Perovskite Nanocomposites

A review on the sensing mechanisms and recent developments on metal halide-based perovskite gas sensors

Fabrication of Robust and Porous Lead Chloride-Based Metal–Organic Frameworks toward a Selective and Sensitive Smart NH3 Sensor

Contact Info

Product

Resources

About

Fabrication of Robust and Porous Lead Chloride-Based Metal–Organic Frameworks toward a Selective and Sensitive Smart NH₃ Sensor