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AssigneeConsorzio per la Ricerca sulla Microelettronica nel Mezzogiorno
InventorsSalvatore Ugo Campisano, Salvatore Lombardo, Giuseppe Ferla, Albert Polman, Gerard Nicolaas Van Den Hoven
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An electro-luminescent material and solid state electro-luminescent device comprising a mixed material layer formed of a mixture of silicon and silicon oxide doped with rare earth ions so as to show intense room-temperature photo- and electro-luminescence is described. The luminescence is due to internal transitions of the rare earth ions. The mixed material layer has an oxygen content ranging from 1 to 65 atomic % and is produced by vapor deposition and rare earth ions implant. A separated implant with elements of the V or III column of the periodic table of elements gives rise to a PN junction. The so obtained structure is then subjected to thermal treatment in the range 400.degree.-1100.degree. C.
A solid state electro-luminescent device, characterized in that it comprises a PN junction formed by electro-luminescent material, including a first region including a mixed material including a mixture of silicon and silicon oxide, the mixed material in the first region being doped with rare earth ions and at least one second region of a mixed material formed by a mixture of silicon and silicon oxide, the mixed material in the second region being doped with dopant elements of the V or III column of the periodic table of elements wherein the oxygen content of said mixed material in the first region is in the range of 1 to 65 atomic %.
A process for fabricating a solid state electro-luminescent device having a junction formed by a first region of electro-luminescent material including a mixture of silicon and silicon oxide each doped with rare earth ions, characterized by the steps of:
A solid state electro-luminescent device having a junction formed by a first region of electro-luminescent material including a mixture of silicon and silicon oxide doped with rare earth ions made by the process of:
Dependencies are inferred from the claim text.