Secondary electron ejection from the MgO protection layer in AC plasma display panels for low-energy noble ions

Lee, S.K.; Kim, J.H.; Lee, J.; Whang, Ki‐Woong

doi:10.1016/s0040-6090(03)00372-9

Cited by 16 publications

(13 citation statements)

References 4 publications

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“…Experimentally, this mechanism is evidenced in the following observations: The SEE coefficient increases as the incident energy of ion increases. 8,12,16 Within the potential emission mechanism, the velocity of the ion could shift neutralization points above the surface. The interaction with image charges within dielectrics then changes the energy transfer by up to 1 eV.…”

Section: B Kinetic Emission Mechanismmentioning

confidence: 99%

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First-principles study on secondary electron emission of MgO surface

Cho

Kim

Ahn

et al. 2007

Journal of Applied Physics

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We theoretically investigate secondary-electron-emission properties of MgO when noble gases are incident on the surface. We consider both potential and kinetic emission mechanisms. For the potential emission through Auger neutralization, densities of states and vacuum level are obtained from the first-principles calculations. It is found that secondary-emission coefficients decrease in the following sequence of surface directions; ͑111͒-OHϾ ͑100͒ Ͼ ͑110͒, a tendency that is in agreement with experimental observations. For a surface model including F center, the secondary-emission coefficient substantially increases for Kr and Xe. To investigate the kinetic emission mechanism by an energetic ion impinging on MgO surfaces, first-principles molecular dynamics simulations are performed. Dynamic up-shifts of antibonding states between ions and oxygen atoms are found to lead to the secondary-electron emission at kinetic energies as low as 30 eV. Various collision conditions are compared based on the temporal interval during which excited states stay within the conduction band.

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Section: B Kinetic Emission Mechanismmentioning

confidence: 99%

“…By contrast, insulating surfaces begin to show signatures of kinetic emission at much lower energies below 100 eV. 8,12,16 This implies that the emission mechanism of the insulating surface due to slow ions is fundamentally different from the case for metallic surfaces. In Ref.…”

Section: B Kinetic Emission Mechanismmentioning

confidence: 99%

First-principles study on secondary electron emission of MgO surface

Cho

Kim

Ahn

et al. 2007

Journal of Applied Physics

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“…5(b)). The surface barrier potential of insulators is usually taken to be equal to its electron affinity χ, [12] predictive formula [30] and are given in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

Ion-induced kinetic electron emission from ⁶ LiF, ⁷ LiF and MgF ₂ thin films

et al. 2010

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Secondary electron yields for Ar + impact on 6 LiF, 7 LiF and MgF 2 thin films grown on aluminum substrates are measured each as a function of target temperature and projectile energy. Remarkably different behaviours of the electron yields for LiF and MgF 2 films are observed in a temperature range from 25 • C to 300 • C. The electron yield of LiF is found to sharply increase with target temperature and to be saturated at about 175 • C. But the target temperature has no effect on the electron yield of MgF 2 . It is also found that for the ion energies greater than 4 keV, the electron yield of 6 LiF is consistently high as compared with that of 7 LiF that may be due to the enhanced contribution of recoiling 6 Li atoms to the secondary electron generation. A comparison between the electron yields of MgF 2 and LiF reveales that above a certain ion energy the electron yield of MgF 2 is considerably low as compared with that of LiF. We suggest that the short inelastic mean free path of electrons in MgF 2 can be one of the reasons for its low electron yield.

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“…MgO is well known material as it has high secondary electron yield for electron bombardment, and it also has high anti-erosion properties. Recently MgO has been used commercially as protection layer for cathode of plasma display panels and its durability and stability has been examined in several experiments [Park et al, 2005] [Lee et al, 2003]. We changed the surface roughness of each plate by applying different polishing methods (roughed by a sandpaper grit P2000, buffing, mechanical polishing, chemical polishing).…”

Section: Setup Of the Experimentsmentioning

confidence: 99%

Research for optimizing the performance of an LEF-TOF ion energy mass analyzer

Tanaka¹,

Saito²,

Hirahara³

et al. 2009

AIP Conference Proceedings

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There are few in-situ heavy ion observations from lunar soil or tenuous alkali atmosphere. It is commonly thought that the heavy ions around the Moon are produced by ion-induced desorption (sputtering) or photon-stimulated desorption from the lunar surface and by photoionization from the atmosphere. These ions are picked up and transported by the solar wind. IMA (Ion Mass Analyzer) on board the SELENE satellite will measure these pickedup ions around the Moon. IMA adopts foil-based LEF (Linear Electric Field) TOF (Time Of Flight) technique for mass analysis in order to discriminate heavy ions up to mass number 60. MgO-coated metal plate is installed at the upper part of the mass analyzer to generate TOF stop electrons efficiently. Though we empirically knew that stop electron generations were enhanced by MgO-coated metal plate, quantitative analyses for the efficiency were insufficient. We compared the efficiency of electron emitter plates with different substrate materials: CuBe and Al and with different MgO thickness: 20nm, 500nm and 1000nm. We also changed the surface roughness of these base plates. Our experimental results showed there are notable differences in the electron emission efficiency between MgO-coated plates and non-coated plates. We also found that the thicker MgO emits secondary electrons more efficiently. The efficient electron emission was mainly caused by the enhancement of the secondary electron yields of a single ion impact because the pulse height distribution of the stop signals generated by MgO coated plates was higher than that of non-coated plates.

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Secondary electron ejection from the MgO protection layer in AC plasma display panels for low-energy noble ions

Cited by 16 publications

References 4 publications

First-principles study on secondary electron emission of MgO surface

First-principles study on secondary electron emission of MgO surface

Ion-induced kinetic electron emission from ⁶ LiF, ⁷ LiF and MgF ₂ thin films

Research for optimizing the performance of an LEF-TOF ion energy mass analyzer

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Secondary electron ejection from the MgO protection layer in AC plasma display panels for low-energy noble ions

Cited by 16 publications

References 4 publications

First-principles study on secondary electron emission of MgO surface

First-principles study on secondary electron emission of MgO surface

Ion-induced kinetic electron emission from 6 LiF, 7 LiF and MgF 2 thin films

Research for optimizing the performance of an LEF-TOF ion energy mass analyzer

Contact Info

Product

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Ion-induced kinetic electron emission from ⁶ LiF, ⁷ LiF and MgF ₂ thin films