Field emission properties of Si tip arrays coated with N-doped SrTiO3 thin films at different substrate temperature

Bian, Huakang; Chen, X. F.; Pan, Jisheng; Zhu, Weiguang; Sun, Chang Q.

doi:10.1063/1.3056180

Cited by 5 publications

(4 citation statements)

References 30 publications

(20 reference statements)

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“…For example, the presence of antibonding dipoles lowers the work functions drastically by more than 1 eV, 92 which greatly aids electron emission for imaging and display. [93][94][95] The nitrogenation of diamond and carbon nanotubes, the oxidation and fluorination of metals, etc., have all been widely used in industrial sectors. It is expected that proper doping of N, O and F to the surface of low workfunction metals could be beneficial to the field emission.…”

Section: Principle: Lone Pair and Dipole Creationmentioning

confidence: 99%

Dominance of broken bonds and nonbonding electrons at the nanoscale

2010

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Although they exist ubiquitously in human bodies and our surroundings, the impact of nonbonding lone electrons and lone electron pairs has long been underestimated. Recent progress demonstrates that: (i) in addition to the shorter and stronger bonds between under-coordinated atoms that initiate the size trends of the otherwise constant bulk properties when a substance turns into the nanoscale, the presence of lone electrons near to broken bonds generates fascinating phenomena that bulk materials do not demonstrate; (ii) the lone electron pairs and the lone pair-induced dipoles associated with C, N, O, and F tetrahedral coordination bonding form functional groups in biological, organic, and inorganic specimens. By taking examples of surface vacancy, atomic chain end and terrace edge states, catalytic enhancement, conducting-insulating transitions of metal clusters, defect magnetism, Coulomb repulsion at nanoscale contacts, Cu(3)C(2)H(2) and Cu(3)O(2) surface dipole formation, lone pair neutralized interface stress, etc, this article will focus on the development and applications of theory regarding the energetics and dynamics of nonbonding electrons, aiming to raise the awareness of their revolutionary impact to the society. Discussion will also extend to the prospective impacts of nonbonding electrons on mysteries such as catalytic enhancement and catalysts design, the density anomalies of ice and negative thermal expansion, high critical temperature superconductivity induced by B, C, N, O, and F, the molecular structures and functionalities of CF(4) in anti-coagulation of synthetic blood, NO signaling, and enzyme telomeres, etc. Meanwhile, an emphasis is placed on the necessity and effectiveness of understanding the properties of substances from the perspective of bond and nonbond formation, dissociation, relaxation and vibration, and the associated energetics and dynamics of charge repopulation, polarization, densification, and localization. Finding and grasping the factors controlling the nonbonding states and making them of use in functional materials design and identifying their limitations will form, in the near future, a subject area of "nonbonding electronics and energetics", which could be even more challenging, fascinating, promising, and rewarding than dealing with core or valence electrons alone.

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Section: Principle: Lone Pair and Dipole Creationmentioning

confidence: 99%

Dominance of broken bonds and nonbonding electrons at the nanoscale

2010

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“…Together with the low turn-on field and high current density described above, the current Au/Si-NC core-shells can be regarded as excellent field emitters and should be of great potential for various field emissionassociated applications. Compared to the field emission characteristics collected from the literature reported for varieties of Si-related nanostructures (Table 1), 6,[18][19][20]23 it is evident that the Pt/Si-NC and Au/Si-NC structures presented in this study outperform most of them by a large margin, except for the very low turn-on field observed in ZnO/Si-NPs. 20 However, it is noted here that in the ZnO/Si-NPs 20 the average tip radius of the Si-NPs was only about 15 nm compared to B30 nm in the present case.…”

Section: Resultsmentioning

confidence: 45%

“…In order to improve the field emission properties of Si-NSs, various approaches were developed. [7][8][9][10][11][12][13][14][15][16][17] For instance, various ferroelectric oxides 18,19 have been coated on the pre-fabricated Si-NSs in trying to take the advantage of low electron affinity and polarization induced electric fields at the interface, both are conceived to be beneficial to electron emissions. Alternatively, semiconductor thin films grown by atomic layer deposition (ALD) 20 were coated onto the Si-NSs to improve their field emission characteristics.…”

Section: Introductionmentioning

confidence: 99%

Enhanced field emission characteristics in metal-coated Si-nanocones

Chang

Kao

Tai

et al. 2013

Phys. Chem. Chem. Phys.

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Metallic gold (Au) and platinum (Pt) thin films were deposited on silicon nanocones (Si-NCs) by sputtering to elucidate the effects of work function and conductivities on the field electron emission characteristics of surface-modified Si-NCs. The results showed that for Pt/Si-NCs and Au/Si-NCs, although the turn-on field defined at a corresponding current density of 10 μA cm(-2) only improved from 4.20 V μm(-1) for bare Si-NCs to 3.65 and 2.90 V μm(-1), respectively, the emission current density measured at 5.00 V μm(-1) was enhanced by orders of magnitude, reaching 1.82 mA cm(-2) for Au/Si-NCs. Compared to those obtained from various surface-modified Si-nanostructures, such as ZnO/Si-nanopillars and ferroelectrics/Si-nanotips, the current results represent an interesting alternative route for producing surface-modified Si-NCs that might be useful for optical and electronic applications.

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“…[ 12–22 ] Because SrTiO 3 has the advantages of excellent photoelectric performance of perovskite material and stability of inorganic material, it also shows great development potential in the field of field emission (FE). [ 23–25 ]…”

Section: Introductionmentioning

confidence: 99%

Enhanced Field Emission Properties of ZnO:Al/SrTiO₃ Perovskite Composite Films by ZnO:Al Film

Wang

et al. 2022

Physica Status Solidi (a)

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ZnO:Al(Al‐doped zinc oxide)/SrTiO3 composite thin film field emission (FE) devices are fabricated on heavily doped n‐type silicon substrates using a vacuum electron beam evaporation vapor deposition technique and hydrogen plasma treated technique. The morphology and thickness of SrTiO3 film and ZnO:Al film are controlled by adjusting and optimizing the growth conditions, deposition time, and post‐treatment conditions. FE experimental results show that the addition of ZnO:Al films can significantly improve the FE properties of ZnO:Al/SrTiO3 composite film. The maximum current density of the FE sample increases from 230 μA cm−2 of the monolayer SrTiO3 film sample, which is treated by hydrogen plasma (H–SrTiO3) to 951 μA cm−2 of the ZnO:Al/H–SrTiO3 composite film sample, which increases by more than 4 times. Meanwhile, at the applied electric field intensity of 3.6 V μm−1, the FE current density of ZnO:Al/H–SrTiO3 composite film is 48 times that of monolayer H–SrTiO3 film. Each field emission sample device has good working stability and experimental repeatability.

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Field emission properties of Si tip arrays coated with N-doped SrTiO3 thin films at different substrate temperature

Cited by 5 publications

References 30 publications

Dominance of broken bonds and nonbonding electrons at the nanoscale

Dominance of broken bonds and nonbonding electrons at the nanoscale

Enhanced field emission characteristics in metal-coated Si-nanocones

Enhanced Field Emission Properties of ZnO:Al/SrTiO₃ Perovskite Composite Films by ZnO:Al Film

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Field emission properties of Si tip arrays coated with N-doped SrTiO3 thin films at different substrate temperature

Cited by 5 publications

References 30 publications

Dominance of broken bonds and nonbonding electrons at the nanoscale

Dominance of broken bonds and nonbonding electrons at the nanoscale

Enhanced field emission characteristics in metal-coated Si-nanocones

Enhanced Field Emission Properties of ZnO:Al/SrTiO3 Perovskite Composite Films by ZnO:Al Film

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Product

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Enhanced Field Emission Properties of ZnO:Al/SrTiO₃ Perovskite Composite Films by ZnO:Al Film