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High efficiency blue from SrS:Ce/ZnS:Mn 'color by white' thin film electroluminescence devices

: Oberacker, T.A.; Troppenz, U.; Hüttl, B.; Gaertner, T.; Herrmann, R.; Velthaus, K.-O.

Society for Information Display -SID-; IEEE Electron Devices Society:
International Display Research Conference and International Workshops on LCD Technology and Emissive Technology 1997. Conference record : Papers presented at Sheraton Centre Toronto, Toronto, Canada, September 15 - 19, 1997
Santa Ana, Calif.: Society for Information Display, 1997
International Display Research Conference (IDRC) <17, 1997, Toronto>
International Workshops on LCD Technology and Emissive Technology <1997, Toronto>
Fraunhofer HHI ()
cerium; colour displays; electroluminescent displays; light sources; manganese; optical filters; strontium compounds; thin film devices; zinc compounds; srs:ce/zns:mn; thin film electroluminescence devices; broad band emitting thin film electroluminescent structures; full color tfel displays; white emitter; stacked phosphor; blue-green emitting srs:ce; orange-red emitting zns:mn; filtered blue luminance; fuji hunt dye filter; luminous efficiency; cie color coordinates; 60 hz; 50 v; srs:ce,ag,mn-zns:mn

In this contribution we report on the performance of an improved blue emission of broad band emitting thin film electroluminescent (TFEL) structures for full color TFEL displays employing the 'color by white' concept. The used white emitter consists of a stacked phosphor of blue-green emitting cerium doped strontium sulfide (SrS:Ce) and orange-red emitting manganese doped zinc sulfide (ZnS:Mn). A filtered blue luminance 50 V above threshold of L50=14 cd/m2 at 60 Hz has been measured using a Fuji Hunt dye filter, resulting in a luminous efficiency of eta =0.13 Im/W. The CIE color coordinates are (x=0.1/ly=0.26).