K.W. Whang*, J.H. Seo, H.S. Jeong, C. K. Yoon, J. K. Kim

School of Electrical Engineering, Seoul National University, Seoul 151-742, KOREA
pllab@pllab.snu.ac.kr

AC type plasma display panel (PDP) with a He-Ne-Xe mixture shows higher luminance and efficiency than that with He-Xe or Ne-Xe mixture.[1] In this paper, a time-resolved vacuum ultra violet emission study was carried out to explain the mechanism behind this improvement using test PDP having surface discharge type cell with 100-500torr, He-Xe and Ne-Xe mixture. The results showed that 147nm VUV emission characteristics change drastically as the pressure increases for Ne-Xe mixture. Typical decay behavior of 147nm emission seems to be composed of two decay time constants. In the early stage of decay (omitted), the first decay time constant is usually smaller than the second one at low pressure. But the first decay time constant increases very rapidly as the pressure increases for the Ne-Xe mixture. On the other hand, the 173nm emission decays with a single time constant and that of Ne-Xe mixture is smaller than that of He-Xe. The fast decay of 173nm in Ne-Xe is due to the fast loss of Xe(3P2) than that in He-Xe because Xe2*(1u:0) is formed by three body collision of Xe(3P2).[2] The change of 147nm emission characteristic with pressure is thought to be due to the collision induced radiation of Xe(3P2).[3] The improvement of visible light emission from phosphor excited by the VUV from He-Ne-Xe plasma is due to the balanced change of 147nm and continuum emission with the He to Ne mixing ratio change.

[1] J.H. Seo, H.S. Jeong, C.K. Yoon, J.K.Kim and K.W. Whang, IDRC, Toronto, p. 293 (1997)
[2] P.Moutard, P.Laporte, J.-L.subtil, N.Damany and H.Damany, J.Chem.Phys., 88, p. 7485 (1988)
[3] J.H.Kolts and D.W.Setser, J.Chem.Phys., 68, p.4848 (1978)