Analysis of vacuum ultra violet spectra from plasma display panel with He-Ne-Xe mixture

VUV (Vacuum ultra violet) spectra have been measured to understand the discharge chemistry in an AC type color PDP (Plasma Display Panel) cell containing He-Ne-Xe gas mixture. The luminance and relative intensities of VUV spectral lines from Xe* and Xe₂* are dependent on the He/Ne mixing ratio. Xe I resonance line increases with Ne content increases and Xe₂* molecular emission increases with Ne content increases. A plasma chemistry model is used to explain the changes in VUV spectra as a function of He/Ne mixing ratio. The solution of electron Boltzmann equation indicates that the electron temperature decreases as He content increases. Thus the density of Xe* decreases and that of Xe₂* increases as the He content increases due to the decreased electron impact reaction. NeXe* dimer formation at high Ne content could compete with the formation of Xe₂*.