Browse Prior Art Database

ZnTe Luminescent Device

IP.com Disclosure Number: IPCOM000092006D
Original Publication Date: 1968-Aug-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Crowder, BL: AUTHOR [+2]

Abstract

Injection luminescence is produced in body 10 of Zn telluride which is essentially all P-type, by producing within a surface portion of the body an inversion layer containing an excess of electrons. Main body 10 of the zinc telluride is doped with lithium. Layer 12 at the surface contains both lithium and aluminum. Inversion in layer 12 is produced by a voltage applied to a metal electrode separated from the layer by a thin layer of insulating material. An ohmic contact of gold is made to body 10. An ohmic contact, N-type, of cadmium and indium is made to layer 12. The operation is initiated by shining light on layer 12 which responds photoconductively to become N-type.

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ZnTe Luminescent Device

Injection luminescence is produced in body 10 of Zn telluride which is essentially all P-type, by producing within a surface portion of the body an inversion layer containing an excess of electrons. Main body 10 of the zinc telluride is doped with lithium. Layer 12 at the surface contains both lithium and aluminum. Inversion in layer 12 is produced by a voltage applied to a metal electrode separated from the layer by a thin layer of insulating material. An ohmic contact of gold is made to body 10. An ohmic contact, N-type, of cadmium and indium is made to layer 12. The operation is initiated by shining light on layer 12 which responds photoconductively to become N-type. The positive voltage on the metal electrodes concentrates the excess electrons in a narrow channel, from which they are injected across the junction at 14 into P-type body 10 to produce recombination radiation. Once the recombination radiation is produced, it is possible that this radiation itself will sustain the operation without the necessity of applying light from an electrical source. It is also possible that sufficient inversion can be produced by a high-voltage pulse to initiate the operation without an external light source.

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