Mn-activated yttria-based multicomponent oxide phosphors for thin film EL devices

Tadatsugu Minami; Youhei Kobayashi; Toshihiro Miyata; Shingo Suzuki

doi:10.1117/12.483076

17 September 2002 Mn-activated Yttria-based multicomponent oxide phosphors for thin-film EL devices

Tadatsugu Minami, Youhei Kobayashi, Toshihiro Miyata, Shingo Suzuki

Proceedings Volume 4918, Materials, Devices, and Systems for Display and Lighting; (2002) https://doi.org/10.1117/12.483076
Event: Photonics Asia, 2002, Shanghai, China

Abstract

High-luminance EL emissions were found to be obtainable using newly developed Mn-activated Y₂O₃-based multicomponent oxide phosphors composed of Y₂O₃ in combination with another binary compound, B₂O₃, Al₂O₃, Ga₂O₃, In₂O₃, Gd₂O₃, GeO₂ or SiO₂. The EL characteristics were investigated using a thick ceramic sheet-insulating-layer-type TFEL device. The Mn-activated Y₂O₃-based phosphor thin films were deposited by rf magnetron sputtering and postannealed. Luminances above 1000 cd/m² were obtained in TFEL devices fabricated using a ((Y₂O₃)X-(Ga₂O₃)1-X):Mn, a ((Y₂O₃)X-(Gd₂O₃)_1-X):Mn, a ((Y₂O₃)X-(Al₂O₃)_1-X):Mn or a ((Y₂O₃)_X-(GeO₂)_1-X):Mn thin film prepared with various compositions (X) and driven at 1 kHz. In particular, high luminances above 7000 cd/m² for yellow emission were obtained in 1 kHz-driven TFEL devices using a ((Y₂O₃)_0.6-(GeO₂)_0.4):Mn or a (Y₂O₃)_0.5-(Ga₂O₃)_0.5):Mn thin film prepared with a Y₂O₃ content of 60 or 50 mol.percent, respectively. In addition, high luminances above 500 cd/m² and luminous efficiencies of approximately 10 lm/W were obtained in these TFEL devices driven at 60 Hz. High-luminance multicolor emissions that changed from yellow to green could be obtained in TFEL devices using a ((Y₂O₃)_1-X-(Ga₂O₃)X):Mn thin film by increasing the Y₂O₃ content from 0 to 100 mol. percent.

Citation Download Citation

Tadatsugu Minami, Youhei Kobayashi, Toshihiro Miyata, and Shingo Suzuki "Mn-activated Yttria-based multicomponent oxide phosphors for thin-film EL devices", Proc. SPIE 4918, Materials, Devices, and Systems for Display and Lighting, (17 September 2002); https://doi.org/10.1117/12.483076

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