QUANTUM-WELL ACTIVATED PHOSPHORS - A NEW CONCEPT FOR ELECTROLUMINESCENT DISPLAYS

The development of a completely new class of artificially engineered p hosphors for electroluminescent displays is proposed in which deep qua ntum wells embedded in a high band gap material act as radiative cente rs. The proof of concept of such phosphor activation by quantum wells (QWs) has been demonstrated in the CdSe/SrS multi-quantum well system prepared by atomic layer epitaxy. Various QW widths (3-15 nm) were stu died, The reduction in QW width shifts the emission towards shorter wa velength and the emission spectra exhibit multiple peaks, believed to be the result of transitions from several QW levels. (C) 1997 American Institute of Physics.