A Novel Electron Emitter Utilizing Ferroelectric Ceramic Material

Takeuchi, Yukihisa; Nanataki, Tsutomu; Ohwada, Iwao; Akao, Takayoshi

doi:10.3169/itej.60.1818

Cited by 2 publications

(2 citation statements)

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“…Recently, Ohwada and coworkers observed that a large number of electrons are emitted from the surface of a ferroelectric thick film having both a number of microopenings on the upper electrode and ''vacuum gaps'' between the upper electrode and the surface of the ferroelectric layer. [8][9][10][11] They also observed two types of electron emission. One was electron emission from the whole surface of the emitter during a positive polarization reversal, which was considered to be dark emission owing to the switch in surface polarization.…”

Section: Introductionmentioning

confidence: 91%

Investigation of Factor Causing Deterioration of Ferroelectric Electron Emitter

Sugiyama

Sato

Mori

et al. 2009

jjap

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A factor causing deterioration of a ferroelectric electron emitter with a unique porous electrode has been investigated. In an electron emitter that deteriorates upon continuous operation, a decrease of the remnant polarization and a discoloration of the ferroelectric layer were observed. Furthermore, the binding energies of the elements comprising the layer were shown to have shifted to a higher energy when the ferroelectric layer was analyzed by X-ray photoelectron spectroscopy (XPS). These results indicate polarization fatigue caused by oxygen vacancies in the ferroelectric layer. Therefore, we considered that the main factor causing deterioration of our electron emitter is polarization fatigue in the ferroelectric layer. On the basis of these investigations, we applied a new ferroelectric material supplemented with 1 wt % MnO 2 to prevent the degradation of the ferroelectric layer, which resulted in the durability of the electron emitter improving significantly.

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Section: Introductionmentioning

confidence: 91%

Investigation of Factor Causing Deterioration of Ferroelectric Electron Emitter

Sugiyama

Sato

Mori

et al. 2009

jjap

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“…In 2004 and 2005, we published a novel ferroelectric electron emitter that has a unique microstructure of electron-emitting portions formed between the upper electrode and the surface of the ferroelectric layer. 7,8) By utilizing the ferroelectric emitters as subpixels, we demonstrated a moving colored image using 128 gray scales per color displayed on a 4.3-in. prototype fieldemission display.…”

Section: Introductionmentioning

confidence: 99%

Electrode Structure of Ferroelectric Electron Emitter

Ohwada

Sugiyama

Nanataki

2007

jjap

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A novel electron emitter utilizing the characteristics of ferroelectric ceramic materials has been developed. The electronemitting portion of the electron emitter has a unique microstructure that has a vacuum gap between the upper electrode and the surface of the ferroelectric layer. We confirmed electron emission by a three-step process that consists of (the first step) electron charge, (the second step) charge retention, and (the third step) electron emission. The asymmetric property of ferroelectric hysteresis in the process indicates the following results. In the first step, an electron charge is performed in synchrony with the polarization reversal of the ferroelectric layer. On the other hand, in the third step, the electric field in the vacuum gap advances the electron emission while the polarization reversal is performed in the ferroelectric layer.

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A Novel Electron Emitter Utilizing Ferroelectric Ceramic Material

Cited by 2 publications

References 1 publication

Investigation of Factor Causing Deterioration of Ferroelectric Electron Emitter

Investigation of Factor Causing Deterioration of Ferroelectric Electron Emitter

Electrode Structure of Ferroelectric Electron Emitter

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