Effect of Ce doping on the optoelectronic and sensing properties of electrospun ZnO nanofibers

Liu, Yanjie; Zhang, Hong-Di; Xu, Yan; Zhao, Aijing; Zhang, Zhiguang; Si, Wenyan; Gong, Maogang; Zhang, Juncheng; Long, Yun-Ze

doi:10.1039/c6ra16491a

Cited by 22 publications

(6 citation statements)

References 30 publications

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“…Addressing the limitations of QD-based LCD backlight life-time would not only require to enhance the fluorescence efficiency and stability of QDs, but more importantly desire for a robust support that could firmly load QDs and provide them the sufficient protection from fluorescence quenching, because the traditional substrate employs polyethylene terephthalate (PET) film on which QDs are directly exposed to the harsh environment or easily illuminated by hard blue light, accelerating the fluorescence quenching and reducing the operational lifetime. [18,19] 1D nanofibers (NFs) are an ideal support material for the flexible electronic and optoelectronic devices due to their large surface area and unique 1D confined properties, e.g., waveguiding, [20,21] fluorescence polarization, [21] and enhanced charge carrier mobility. [22,23] Up to now, the most reported methods for NFs fabrication focused on electrospinning, melt spinning, [24] Quantum dot (QD)-based liquid crystal displays (LCDs) are emerging as a new generation of LCDs due to their good performance.…”

Section: Robust Nanofiber Films Prepared By Electro-microfluidic Spinmentioning

confidence: 99%

Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays

Xie

Cui

Cheng

et al. 2020

Adv Elect Materials

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Quantum dot (QD)‐based liquid crystal displays (LCDs) are emerging as a new generation of LCDs due to their good performance. However, the QD fluorescent materials in LCDs are vulnerable to water and high temperatures, severely limiting their practical and long‐term use. Here, flexible and ultrastable QD‐based color‐converting films for LCD backlights are fabricated using robust poly(styrene‐methyl‐methacrylate‐acrylic acid) (poly(St‐MMA‐AA)) nanoparticle/polyamide 66 nanofiber (NPs@PA66) film with unique fiber–particle–fiber microstructure as protective substrate. Through an emerging strategy called electro‐microfluidic spinning technology (EMST), the nanofiber film not only exhibits excellent flexibility but also remarkably improves the mechanical property via the in situ particle‐mediated enhancement mechanism. An LCD backlight using the NPs@PA66 nanofiber film as QD loading substrate shows a wide color gamut of 116% and long‐term fluorescence stability under high temperature of 200 °C. More importantly, the fluorescence lifetime of NPs@PA66/QDs backlight reaches up to ≈64500 h, ≈22 times higher than that using encapsulated sandwiched polyethylene terephthalate (PET) QD film. These findings offer a promising method toward high‐strength nanofiber manufacturing, high‐stability flexible electronics and optoelectronic display devices.

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Section: Robust Nanofiber Films Prepared By Electro-microfluidic Spinmentioning

confidence: 99%

Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays

Xie

Cui

Cheng

et al. 2020

Adv Elect Materials

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“…When used for bioimaging, these nanoparticles have great advantages over the more common quantum dots, such as fluorescence stability, absence of photobleaching, strong penetration ability, low induced photodamage, weak autofluorescence background, high detection sensitivity and signal-to-noise ratio [12]. For these reasons, the possibility to combine the peculiar chemical-physical features of electrospun fibers with the unique optical characteristics of rare earth ions has the fascinating potential to obtain new types of multifunctional materials [13,14]. Unfortunately, RE ions in polymer matrixes usually exhibit low emission efficiency and the direct growth of crystal fibers through electrospinning is not possible.…”

Section: Introductionmentioning

confidence: 99%

RE-Based Inorganic-Crystal Nanofibers Produced by Electrospinning for Photonic Applications

Toncelli

2021

Materials

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Electrospinning is an effective and inexpensive technique to grow polymer materials in nanofiber shape with exceptionally high surface-area-to-volume ratio. Although it has been known for about a century, it has gained much interest in the new millennium thanks to its low cost and versatility, which has permitted to obtain a large variety of multifunctional compositions with a rich collection of new possible applications. Rare-earth doped materials possess many remarkable features that have been exploited, for example, for diode pumped bulk solid-state lasers in the visible and near infrared regions, or for biomedical applications when grown in nanometric form. In the last few decades, electrospinning preparation of rare-earth-doped crystal nanofibers has been developed and many different materials have been successfully grown. Crystal host, crystal quality and nanosized shape can deeply influence the optical properties of embedded rare earth ions; therefore, a large number of papers has recently been devoted to the growth and characterization of rare earth doped nanofibers with the electrospinning technique and an up-to-date review of this rapidly developing topic is missing; This review paper is devoted to the presentation of the main results obtained in this field up to now with particular insight into the optical characterization of the various materials grown with this technique.

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“…Liu et al . studied the effect of Ce doping on the optoelectronic and sensing properties of electrospun ZnO nanofibres and found that the photoluminescence integrated intensity ratio of UV emission to deep‐level green emission for Ce‐doped ZnO nanofibres was over twice than that of pure ZnO . Zhang et al .…”

Section: Introductionmentioning

confidence: 99%

Enhanced photoluminescence properties of electrospun Dy³⁺‐doped ZnO nanofibres for white lighting devices

2018

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Dy -doped ZnO nanofibres with diameters from 200 to 500 nm were made using an electrospinning technique. The as-fabricated amorphous nanofibres resulted in good crystalline continuous nanofibres through calcination. Dy -doped ZnO nanofibres were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), ultraviolet-visible (UV-vis) light spectroscopy, Fourier transform infrared spectroscopy (FTIR), and photoluminescence (PL). XRD showed the well defined peaks of ZnO. UV-vis spectra showed a good absorption band at 360 nm. FTIR spectra showed a Zn-O stretching vibration confirming the presence of ZnO. Photoluminescence spectra of Dy -doped ZnO nanofibres showed an emission peak in the visible region that was free from any ZnO defect emission. Emissions at 480 nm and 575 nm in the Dy -doped ZnO nanofibres were the characteristic peaks of dopant Dy and implied efficient energy transfer from host to dopant. Luminescence intensity was found to be increased with increasing doping concentration and reduction in nanofibre diameter. Colour coordinates were calculated from photometric characterizations, which resembled the properties for warm white lighting devices.

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Effect of Ce doping on the optoelectronic and sensing properties of electrospun ZnO nanofibers

Cited by 22 publications

References 30 publications

Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays

Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays

RE-Based Inorganic-Crystal Nanofibers Produced by Electrospinning for Photonic Applications

Enhanced photoluminescence properties of electrospun Dy³⁺‐doped ZnO nanofibres for white lighting devices

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Effect of Ce doping on the optoelectronic and sensing properties of electrospun ZnO nanofibers

Cited by 22 publications

References 30 publications

Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays

Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays

RE-Based Inorganic-Crystal Nanofibers Produced by Electrospinning for Photonic Applications

Enhanced photoluminescence properties of electrospun Dy3+‐doped ZnO nanofibres for white lighting devices

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Enhanced photoluminescence properties of electrospun Dy³⁺‐doped ZnO nanofibres for white lighting devices