A gas discharge device such as a plasma display panel (PDP) device having one or more substrates and a multiplicity of pixels or subpixels. Each pixel or subpixel is defined by a hollow Plasma-shell filled with an ionizable gas. One or more addressing electrodes are in electrical contact with each Plasma-shell. The Plasma-shell may include inorganic and organic luminescent materials that are excited by the gas discharge within each Plasma-shell. The luminescent material may be located on an exterior and/or interior surface of the Plasma-shell or incorporated into the shell of the Plasma-shell. Up-conversion and down-conversion materials may be used. The substrate may be rigid or flexible with a flat, curved, or irregular surface.