High Performance Optoelectronic Devices Based on Bright Perovskite Nanocrystals Synthesized at Room Temperature

In this paper, we investigated the photoluminescence property of ZnO films which were irradiated by KrFexcimer laser. Through the analysis of photoluminescence and UV-VIS spectra, it is shown that the red shift of band gap forthe irradiated sample. Room temperature UV photoluminescence of ZnO film is composed of contribution from the FX, the neutral donor bound exciton (D0X) emission and the longitudinal optical (LO) phonon replicas of the bound exciton transition (D0X-1LO). The visible emission band is ascribed toVO+, VZn-, Oiand Vo++. It shows that KrF laser irradiation could effectively modulate the exciton emission, which is important for the application of high performance of emitting optoelectronic devices.

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Photodetector Based on CsPbBr3/Cs4PbBr6 Composite Nanocrystals with High Detectivity

Crystals ◽

10.3390/cryst11111287 ◽

2021 ◽

Vol 11 (11) ◽

pp. 1287

Author(s):

Yue Han ◽

Rong Wen ◽

Feng Zhang ◽

Linlin Shi ◽

Wenyan Wang ◽

...

Keyword(s):

High Performance ◽

Room Temperature ◽

Dynamic Range ◽

Underlying Mechanism ◽

Dual Phase ◽

Linear Dynamic Range ◽

Inorganic Perovskite ◽

Perovskite Nanocrystals ◽

Linear Dynamic ◽

532 Nm

High-quality, all-inorganic CsPbBr3/Cs4PbBr6 composite perovskite nanocrystals (NCs) were obtained with all-solution-processing at room temperature, and a photodetector (PD) with high detectivity was realized based on CsPbBr3/Cs4PbBr6 NCs. The detectivity (D*) of the proposed PD is 4.24 × 1012 Jones under 532 nm illumination, which is among the highest levels for PDs based on all-inorganic perovskite NCs. In addition, a high linear dynamic range (LDR) of 115 dB under 1 V bias was also realized. Furthermore, the underlying mechanism for the enhanced performance of the proposed PD was discussed. Our work might promote the preparation of high-performance PDs based on dual-phase all-inorganic perovskite nanocrystals.

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Cross-linked nonwoven fibers produced by room temperature cure blowing and in situ photopolymerization: 'Greener' approach to high performance nonwovens

10.1021/scimeetings.0c01646 ◽

2020 ◽

Author(s):

Aditya Banerji ◽

Kailong Jin ◽

Mahesh Mahanthappa ◽

Christopher J Ellison

Keyword(s):

High Performance ◽

Room Temperature ◽

Nonwoven Fibers

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Bromopropane as a Novel Bromine Precursor for the Completely Amine Free Colloidal Synthesis of Ultra-Stable and Highly Luminescent Green-Emitting Cesium Lead Bromide (CsPbBr3) Perovskite Nanocrystals

Nanoscale ◽

10.1039/d1nr03560f ◽

2021 ◽

Author(s):

Syed Akhil ◽

V.G.Vasavi Dutt ◽

Nimai Mishra

Keyword(s):

Optoelectronic Devices ◽

Colloidal Synthesis ◽

Ambient Conditions ◽

Active Materials ◽

Perovskite Nanocrystals ◽

Lead Bromide ◽

Halide Perovskite ◽

Lead Halide ◽

Poor Stability

Recently lead halide perovskite nanocrystals (PNCs) have attracted intense interest as promising active materials for optoelectronic devices. However, their extensive applications are still hampered by poor stability in ambient conditions....

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Star-shaped arylacetylene resins derived from silicon

Journal of Polymer Engineering ◽

10.1515/polyeng-2020-0083 ◽

2020 ◽

Vol 40 (8) ◽

pp. 676-684

Author(s):

Niping Dai ◽

Junkun Tang ◽

Manping Ma ◽

Xiaotian Liu ◽

Chuan Li ◽

...

Keyword(s):

High Performance ◽

Room Temperature ◽

Mechanical Test ◽

Flexural Modulus ◽

Mechanical Analysis ◽

Reinforced Composites ◽

Scanning Calorimetry ◽

Chemical Structures ◽

Structures And Properties ◽

High Performance Resin

AbstractStar-shaped arylacetylene resins, tris(3-ethynyl-phenylethynyl)methylsilane, tris(3-ethynyl-phenylethynyl) phenylsilane, and tris (3-ethynyl-phenylethynyl) silane (TEPHS), were synthesized through Grignard reaction between 1,3-diethynylbenzene and three types of trichlorinated silanes. The chemical structures and properties of the resins were characterized by means of nuclear magnetic resonance, fourier-transform infrared spectroscopy, Haake torque rheomoter, differential scanning calorimetry, dynamic mechanical analysis, mechanical test, and thermogravimetric analysis. The results show that the melt viscosity at 120 °C is lower than 150 mPa⋅s, and the processing windows are as wide as 60 °C for the resins. The resins cure at the temperature as low as 150 °C. The good processabilities make the resins to be suitable for resin transfer molding. The cured resins exhibit high flexural modulus and excellent heat-resistance. The flexural modulus of the cured TEPHS at room temperature arrives at as high as 10.9 GPa. Its temperature of 5% weight loss (Td5) is up to 697 °C in nitrogen. The resins show the potential for application in fiber-reinforced composites as high-performance resin in the field of aviation and aerospace.

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Lateral PbS Photovoltaic Devices for High Performance Infrared and Terahertz Photodetectors

Nanomaterials ◽

10.3390/nano11071692 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1692

Author(s):

Emmanuel K. Ampadu ◽

Jungdong Kim ◽

Eunsoon Oh

Keyword(s):

High Performance ◽

Room Temperature ◽

Photovoltaic Device ◽

Photovoltaic Devices ◽

Temperature Spectrum ◽

Terahertz Region ◽

Room Temperature Spectrum ◽

Ftir Spectrometer ◽

Titanium Substrates ◽

Deposition Conditions

We fabricated a lateral photovoltaic device for use as infrared to terahertz (THz) detectors by chemically depositing PbS films on titanium substrates. We discussed the material properties of PbS films grown on glass with varying deposition conditions. PbS was deposited on Ti substrates and by taking advantage of the Ti/PbS Schottky junction, we discussed the photocurrent transients as well as the room temperature spectrum response measured by Fourier transform infrared (FTIR) spectrometer. Our photovoltaic PbS device operates at room temperature for wavelength ranges up to 50 µm, which is in the terahertz region, making the device highly applicable in many fields.

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