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New blue‐emitting phosphor thin films for FEDs
Author(s) -
Gibbons C. S.,
Vecht A.,
Smith D. W.,
Jing X.
Publication year - 1998
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1985233
Subject(s) - phosphor , zinc sulfide , yttrium , materials science , sulfide , thin film , oxide , optoelectronics , nanotechnology , zinc , metallurgy
— Although considerable progress has been made in the investigation of blue‐emitting phosphors for CRT application, there have been very few challenges to replace zinc sulfide silver. This phosphor, with which efficiencies of greater than 20% can be obtained, limited the effort invested in other blue systems. The need for low voltage, as well as other high‐loading phosphors, however, pointed to a change of emphasis. The sulfide systems were not stable under these conditions and only P47, yttrium silicate cerium, has been used, with limited success. We felt that the narrow‐band Eu 2+ phosphors would not yield the efficiencies required. At the University of Greenwich, a systematic investigation into refractory oxide phosphors using other rare‐earth or transition‐metal activators was thus initiated. These were directed at the preparation of powder and thin‐film phosphor systems. The work reported here is on the synthesis and properties of thin films.