Carbon Nanoparticles on Carbon Fabric for Flexible and High‐Performance Field Emitters

Yuan, Longyan; Tao, Yuting; Chen, Jian; Dai, Junjie; Song, Ting; Ruan, M.Y.; Ma, Zongwei; Gong, L.; Liu, Kang; Zhang, Xianghui; Hu, Xuejiao; Zhou, Jun; Wang, Zhong Lin

doi:10.1002/adfm.201100172

Cited by 73 publications

(42 citation statements)

References 29 publications

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“…7,8 To date, a variety of cathodes have been developed based on flexible substrates such as polymers, 9 graphene 7 and carbon fabrics. 10 However, material-and fabrication-related obstacles to the realization of high-performance flexible emitters remain.…”

Section: Introductionmentioning

confidence: 99%

Highly flexible and robust N-doped SiC nanoneedle field emitters

et al. 2015

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Flexible field emission (FE) emitters, whose unique advantages are lightweight and conformable, promise to enable a wide range of technologies, such as roll-up flexible FE displays, e-papers and flexible light-emitting diodes. In this work, we demonstrate for the first time highly flexible SiC field emitters with low turn-on fields and excellent emission stabilities. n-Type SiC nanoneedles with ultra-sharp tips and tailored N-doping levels were synthesized via a catalyst-assisted pyrolysis process on carbon fabrics by controlling the gas mixture and cooling rate. The turn-on field, threshold field and current emission fluctuation of SiC nanoneedle emitters with an N-doping level of 7.58 at.% are 1.11 V μm − 1 , 1.55 V μm − 1 and 8.1%, respectively, suggesting the best overall performance for such flexible field emitters. Furthermore, characterization of the FE properties under repeated bending cycles and different bending states reveal that the SiC field emitters are mechanically and electrically robust with unprecedentedly high flexibility and stabilities. These findings underscore the importance of concurrent morphology and composition controls in nanomaterial synthesis and establish SiC nanoneedles as the most promising candidate for flexible FE applications. NPG Asia Materials (2015) 7, e157; doi:10.1038/am.2014.126; published online 23 January 2015 INTRODUCTIONFlexible electronic devices have attracted extensive attention in recent decades because of their numerous promising applications, such as flexible energy-storage devices, wearable energy-harvesting systems and stretchable electronics. 1-4 Among the emerging technologies, there is considerable interest in flexible field emission (FE) emitters due to their unique lightweight, conformable and flexible nature, which give them the significant advantage of being utilized in roll-up flexible FE displays, 3 e-papers 5 and high-performance X-ray tubes. 6 To enable such next-generation flexible devices, flexible cathodes must be used as the fundamental starting component to replace conventional emitters grown on rigid substrates. These flexible emitters should maintain their original or even better FE properties as well as excellent electrical and mechanical performances after bending, compressing, twisting and stretching. 7,8 To date, a variety of cathodes have been developed based on flexible substrates such as polymers, 9 graphene 7 and carbon fabrics. 10 However, material-and fabrication-related obstacles to the realization of high-performance flexible emitters remain.Silicon carbide (SiC) is an excellent material candidate for constructing advanced FE emitters. SiC is a third-generation wide band-gap semiconductor with excellent physical properties such as high strength and stiffness, high-temperature stability, corrosion resistance and high thermal conductivity. [11][12][13] To date, several studies have explored the FE properties of nanostructured SiC emitters

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Section: Introductionmentioning

confidence: 99%

Highly flexible and robust N-doped SiC nanoneedle field emitters

et al. 2015

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“…Multiplying these resistance fluctuations by the alternating current at frequency u yields a third harmonic voltage V 3u through the metallic line. In 1990, Cahill found an equation (2) through which we can determine the temperature oscillations at frequency 2u at the level of the metallic line [11].…”

Section: Theorymentioning

confidence: 99%

“…Flexible electronic technology is rapidly growing and finds applications in different fields such as lightning, radio frequency identification circuitry, displays and photovoltaics [1,2]. Polymers exhibit different mechanical, optical and chemical properties which render them competitors in such flexible electronic applications.…”

Section: Introductionmentioning

confidence: 99%

Inkjet printing technology for polymer thermal conductivity measurement by the three omega method

et al. 2014

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a b s t r a c tThe three omega method has proven ability to accurately measure the thermal conductivity of solid and soft materials. Nevertheless, in the case of soft materials, the application of the three omega method is still challenging because up to now it generally requires techniques that are time consuming and costly, such as lithography. In this paper, we present an alternative for this kind of material based on inkjet printing technology. To evaluate the performance of this technique, polyimide samples have been prepared by photolithography and inkjet printing. We show that the thermal conductivities measured in both cases by means of the 3u method are very close; demonstrating that inkjet printing technology is a good candidate for characterization of flexible materials in terms of thermal conductivity. Besides the experimental study, a theoretical investigation based on an analytical approach, namely Cahill's method, and a numerical method based on a FEM tool is proposed.

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“…Although hydrocarbon combustion is often associated with pollution, particularly due to the fine and ultrafine particles produced by the incomplete combustion of an organic fuel, flame-produced carbon particles have properties that may be of interest, similar to carbon black production. The interest in these particles for potential applications in electronic devices has recently increased [13,14]. The early molecular precursors in the flame formation of carbonaceous nanoparticles and soot can be identified with benzene molecules and polyaromatic hydrocarbons, PAHs.…”

Section: Introductionmentioning

confidence: 99%