Examples of organic materials that are useful as the light-emitting material in the present device include: antracene, undoped or doped with tetracene; aluminum tris(8-hydroxyquinolinate); poly-(p-phenylenevinylene) (PPV); poly[2-methoxy-5-(2???-ethyl)hexoxy-1,4-phenylenevinylene] (MEHPPV); poly[2-methoxy-5-(2???-ethylhexyloxy)-1,4-phenylenevinylene-co-4,4???-bisphenylenevinylene] (MEH-BP-PPV), po