Self-aligned CH3NH3PbBr3 perovskite nanowires via dielectrophoresis for gas sensing applications

Kirakosyan, Artavazd; Sihn, Moon Ryul; Jeon, Min-Gi; Kabir, Rezaul Md.; Choi, Jihoon

doi:10.1016/j.apmt.2021.101307

Cited by 10 publications

(8 citation statements)

References 52 publications

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“…More importantly, the ligand removal process exposes surface defects such as halide vacancies and increases the number of active sites in the PNCs layer, thereby improving the interaction between PNCs and gases and enabling higher transduction ratio of chemical signals. [40,51,52] As a proof of concept, we observed a significant improvement in sensing response with 1-cycle of MeOAc treatment, which results in a 27-fold increase compared to the [16,18,[34][35][36][37][38][39][40][41][42][43][44][45][46] control film without the MeOAc treatment (Figure S7a, Supporting Information). However, excessive MeOAc treatment can alter the surface morphology due to the substantial loss of ligands (Figure S7b, Supporting Information), leading to a slight reduction in sensing response and cycling stability.…”

Section: Resultsmentioning

confidence: 92%

“…Previous studies proposed that target gas molecules can act as vacancy fillers in perovskite and reversibly fill the intrinsic bromide vacancies. [40,51] Lu et al recently reported Br-based lead-free perovskite hollow nanospheres for CO detecting sensors, suggesting that the vacancies of perovskite hollow nanospheres favor the sensing of CO molecules. [52] In case of MAPbI 3 -type perovskite, it is reported that iodine anion vacancies can generate uncoordinated active sites at the surface that enhanced the gas sensing process.…”

Section: Resultsmentioning

confidence: 99%

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High‐Performance Optoelectronic Gas Sensing Based on All‐Inorganic Mixed‐Halide Perovskite Nanocrystals with Halide Engineering

Kim

John

et al. 2023

Small Methods

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Gas sensors are of great interest to portable and miniaturized sensing technologies with applications ranging from air quality monitoring to explosive detection and medical diagnostics, but the existing chemiresistive NO2 sensors still suffer from issues such as poor sensitivity, high operating temperature, and slow recovery. Herein, a high‐performance NO2 sensors based on all‐inorganic perovskite nanocrystals (PNCs) is reported, achieving room temperature operation with ultra‐fast response and recovery time. After tailoring the halide composition, superior sensitivity of ≈67 at 8 ppm NO2 is obtained in CsPbI2Br PNC sensors with a detection level down to 2 ppb, which outperforms other nanomaterial‐based NO2 sensors. Furthermore, the remarkable optoelectronic properties of such PNCs enable dual‐mode operation, i.e., chemiresistive and chemioptical sensing, presenting a new and versatile platform for advancing high‐performance, point‐of‐care NO2 detection technologies.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

High‐Performance Optoelectronic Gas Sensing Based on All‐Inorganic Mixed‐Halide Perovskite Nanocrystals with Halide Engineering

Kim

John

et al. 2023

Small Methods

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“…Moreover, perovskites have various chemical structures, such as ABX 3 , AB 2 X 5 , and A 4 BX 6 , enabling them to be used with proper adjustment. Perovskites can also detect various types of gases because they can produce various species combinations depending on the type of ions in each A, B, and X sites. − Gas sensors have two main operating principles. They detect the change in electrical properties caused by the sensing gas and exhibit optical properties as listed in Table .…”

Section: Olfactory Sensingmentioning

confidence: 99%

Recent Progress of Halide Perovskites Applied to Five Senses Sensors

Seol

Hwang

Han

et al. 2023

ACS Appl. Electron. Mater.

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The demand for sensors in various fields, such as medicine and materials, has increased. Owing to the recent development of flexible material technology, materials that can be attached to the body are also being developed. Five senses sensors that can replace the five senses of humans are worth investigating. Halide perovskite has excellent optoelectrical properties such as tunable bandgap, long carrier diffusion length, and high photoluminescence quantum yield. However, it has characteristics that are vulnerable to various external factors such as water, light, and gas. As a result, it is considered a material suitable for application to sensors. This study examines the research trends of halide perovskites to develop vision, olfactory, tactile, taste, and auditory sensors. Although studies have been conducted on the application of perovskite oxides in areas such as gas sensors, little research has been conducted in areas such as magnetic sensors. The feasibility of implementing the five senses sensor is addressed by conducting extensive research on these sensors.

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“…To achieve the precise spatial arrangement of nanowires, several approaches have been introduced, [37] such as electrostatic micromanipulation, [38,39] microfluidic assembly, [40,41] Langmuir-Blodgett assembly, [42] and dielectrophoresis. [43] Unfortunately, these approaches are not directly adoptable for the perovskite nanowire assembly in consideration of the chemical instability related process incompatibility. Although the electrostatic micromanipulation has been incorporated to position perovskite nanowires, this method is more preferred to control individual nanowire.…”

Section: Research Articlementioning

confidence: 99%

3D Meniscus‐Guided Evaporative Assembly for Rapid Template‐Free Synthesis of Highly Crystalline Perovskite Nanowire Arrays

Kim

Yun

et al. 2022

Adv Funct Materials

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Low-dimensional nanostructures of halide perovskites have been receivingextensive research interest for their superior optical, electrical, and stability characteristics over their conventional bulk counterparts. In particular, the unique surficial characteristics of well-defined 1D nanowires have shown high feasibility for high performance optoelectronic applications. The key aspect of endorsing this nanoscale form factor in practical applications lies in securing dimensional uniformity and controllability in large scales, which generally requires complicated lithographic procedures. In this work, a simple, rapid, and widely applicable strategy for the direct synthesis and printing of wellaligned nanowire arrays on a large scale is demonstrated. By employing blade coating methods with sophisticatedly controlled stick-slip motions, periodically resolved transverse 3D meniscus enables uniform directional growth of highly crystalline CsPbI 3 nanowires without the need for templates. A systematic investigation of morphological evolutions with respect to kinetic processing variables is conducted, along with a comprehensive suite of structural and optical analyses for the synthesized nanowire arrays. A single nanowire photodetector is employed to demonstrate the superiority and applicability of the fabrication strategy. Finally, a 2D image recognition is demonstrated by using an array of photodetectors fabricated via a fast (<2 min) direct printing of nanowire arrays on wafers.

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Self-aligned CH3NH3PbBr3 perovskite nanowires via dielectrophoresis for gas sensing applications

Cited by 10 publications

References 52 publications

High‐Performance Optoelectronic Gas Sensing Based on All‐Inorganic Mixed‐Halide Perovskite Nanocrystals with Halide Engineering

High‐Performance Optoelectronic Gas Sensing Based on All‐Inorganic Mixed‐Halide Perovskite Nanocrystals with Halide Engineering

Recent Progress of Halide Perovskites Applied to Five Senses Sensors

3D Meniscus‐Guided Evaporative Assembly for Rapid Template‐Free Synthesis of Highly Crystalline Perovskite Nanowire Arrays

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