Accession Number : AD0290231


Title :   INVESTIGATION OF CARRIER INJECTION ELECTROLUMINESCENCE


Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON N J


Personal Author(s) : FISCHER,A G ; FONGER,W ; MASON,A S


Report Date : 15 Aug 1962


Pagination or Media Count : 1


Abstract : A summary is presented of the work on ac electroluminescence of ZnS powder. Novel basic observations and new measurements on el lines in powder particles are described. A new comprehensive model is derived and compared with previous models. The model is applied to all known facts of powder el and yields many new insights. It is shown that ac-el is caused by bipolar tunnel injection. A description is given of the realization of dc carrier injection electroluminescence. Conducting, photoluminescent ZnSe crystals grown from the melt under Zn pressure show high electron mobilities and display dc-el. Pure ZnSe and ZnTe starting materials have been prepared by new methods, and advances in zone purification were made. Difficulties were encountered in Czochralski pulling of these materials, but approaches were found. Flux-grown GaP crystals show near-band-gap radiation, sublimed crusts bright red injection el. No miscibility between GaP and BP could be observed, and BP was difficult to prepare in pure form. ZnSe was recrystallized from supersaturated zinc flux. (Author)


Descriptors :   *LUMINESCENCE , *PHOSPHORESCENT MATERIALS , *SINGLE CRYSTALS , *ZINC COMPOUNDS , BORON , BRIGHTNESS , ELECTRIC CONNECTORS , VOLTAGE , EVAPORATION , FIELD EMISSION , GALLIUM COMPOUNDS , LIQUID METAL COOLED REACTORS , MEASUREMENT , MICROSCOPY , OPTICS , PARTICLES , PHOSPHIDES , PHOSPHORUS , PHOTOELECTRIC EFFECT , REFRACTIVE INDEX , THIN FILM STORAGE DEVICES


Distribution Statement : APPROVED FOR PUBLIC RELEASE