Measurement of excited Xe atoms density in alternating current plasma display panel by means of laser absorption spectroscopy

Abstract

The exited Xe atoms in the 1s 5 metastable state and the 1s 4 resonance state across the two sustaining electrode have been monitored in a micro-discharge cell of alternating current plasma display panels (PDPs) by laser absorption spectroscopy. In this study, it is found that the maximum excited xenon density is 5 4 10 12 cm 3 in the 1s 5 metastable state and 1 2 10 12 cm 3 in the 1s 4 resonance state for the PDP cell with gap distance of 150 m and width of 350 m under the fixed gas pressure of 350 torr and a mixture of Xe content ratio of 10% with Ne under driving frequency of 35 kHz. It is also observed that the exited Xe atom density and the plasma ion density are strongly correlated with one another in this experiment. It is noted that the plasma ion density reaches a minimum at the center of electrode gap and a maximum of 9 0 10 11 cm 3 in a region located 200 m away from this center under the filling pressure of 350 torr, which corresponds to the strongest discharge in alternating current plasma display panel (ac-PDP). When increasing PDP driving frequency from 35 kHz, 50 kHz up to 100 kHz, it is found that density of excited Xe atom in the 1s 5 metastable state increase from 6 5 10 12 cm 3 up to 1 39 10 13 cm 3Index Terms-Alternating current plasma display panel, excited Xe atom, laser absorption spectroscopy, metastable state, plasma ion density, resonance state.

The effect of electrode tilt angle on the characteristics of coplanar dielectric barrier discharges with Xe-Ne mixtures

“…There were some examples in which the high electric field was achieved by the modification of cell design. 10,31,32 However, those designs are not easy to apply in real PDPs because of the complication in fabrication. Figure 4 shows the change in E/p distribution with time for each case.…”

Fast oscillatory behavior of the excited xenon density in the discharge cells of a plasma display panel

“…The profile of the applied voltage shows a square pulse with a driving frequency of 42 kHz and a duty ratio of 25%. Laser absorption spectroscopy 16,17 was used to measure the atom density N m in a metastable state of Xe ‫ء‬ ͑ 3 P 2 ͒. Excited xenon atoms in the metastable state were measured using a near-infrared laser of 823 nm.…”

Spatiotemporal Behavior of Excited Xenon-Atom Density in Accordance With Xenon Mole Fraction to Neon in Alternating-Current Plasma Display Panels by Laser-Absorption Spectroscopy

“…It is noted that the VUV 173 nm emitted from the excited molecular dimers still increases with the increasing xenon mole fractions, because the dimers scales linearly with the Xe density. It is observed that the excited Xe atom's density for the 1s 4 resonant state is usually three times smaller than that for the 1s 5 metastable state [12], [13] even though the peak intensity of resonant 147 nm are much stronger than that of 173 nm [7]. Here, it is also noted for the high Xe mole fractions above ∼10% that the integrated intensity over the continuum emission wavelength for the 173 nm from the molecular dimers Xe * 2 is much bigger than that of 147 nm for the 1s 4 resonant Xe atoms, which gives direct influence on the luminous efficiency.…”

“…Here, it is also noted for the high Xe mole fractions above ∼10% that the integrated intensity over the continuum emission wavelength for the 173 nm from the molecular dimers Xe * 2 is much bigger than that of 147 nm for the 1s 4 resonant Xe atoms, which gives direct influence on the luminous efficiency. Hence, we particularly investigated the spatiotemporal behavior of the excited Xe-atom density of the 1s 5 metastable state without taking account of 0093-3813/$25.00 © 2008 IEEE the 1s 4 resonant atoms in this paper according to the various Xe mole fractions of 4%, 7%, 10%, and 15% to Ne gas by the laser-absorption spectroscopy [13]- [15]. The excited Xe-atom density in the 1s 5 metastable state plays a dominant role in luminous efficiency.…”

“…Fig. 1 shows the experimental schematic diagram of laserabsorption spectroscopy for spatiotemporal measurement of excited xenon atoms in the 1s 5 metastable state [13]. IR probe beam is split into two directions by beam splitter.…”