1993 Fiscal Year Final Research Report Summary
Studies of red-, green- and blue-emitting TFEL devices using oxide phosphors
| Project/Area Number |
04650024
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied materials
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| Research Institution | KANAZAWA INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
TAKATA Shinzo KANAZAWA INSTITUTE OF TECHNOLOGY,DEPARTMENT OF ELECTRICAL ENGINEERING,PROFESSOR, 工学部, 教授 (70064467)
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| Co-Investigator(Kenkyū-buntansha) |
ISHII Makoto KANAZAWA INSTITUTE OF TECHNOLOGY,DEPARTMENT OF ELECTRONICS,PROFESSOR, 工学部, 教授 (30222946)
FUKUDA Ichirou KANAZAWA INSTITUTE OF TECHNOLOGY,DEPARTMENT OF ELECTRONICS,PROFESSOR, 工学部, 教授 (10064445)
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| Project Period (FY) |
1992 – 1993
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| Keywords | Electroluminescence / EL displays / full-color EL / multicolor EL / TFEL devices / flat-panel display / barium titanate |
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| Research Abstract |
Multicolor emitting thin-film electroluminescnt (TFEL) devices using oxide-phosphor, such as Y_2O_3 : Ce (for red emission), Zn_2SiO_4 : Mn (for green, yellow, red and white), Zn_2SiO_4 : Ti (for blue), Zn_2SiO_4 : Tm (for blue), Zn_2SiO_4 : Ce (for blue-green), Sr_2P_2O_7 : Eu (for blue), Sr_2P_2O_7 : Sn (for blue), Y_2SiO_5 : Ce, BaMgAl_<14>O_<23> : Eu (for blue) and Sr_2P_2O_7 : Eu, Mn (for white) as the emitting layr are described. Red, green, blue or white emissions were obtained by controlling the preparation conditions of the emitting layr of the TFEL devices, and the compositions of the host materials for phosphors.
Results obtained are summarized as follows : 1) It was found that the oxide-phosphor emitting layrs prepared on BaTiO_3 ceramic insulating sheets postannealed at the temperature ranging from 700 to 1000ﾟC after deposition have good crystallinity. 2) By controlling the preparation condition and the composition of the host materials, red, green, blue and white emissions from the TFEL devices by 1 kHz sinusoidal-wave voltages were obtained with maximum luminance [in cd/m^2] of 1 for Zn_2SiO_4 : Mn, 3020 for Zn_2SiO_4 : Mn, 15.8 for Zn_2SiO_4 : Ti, respectively. 3) These hosts are promising materials as the blue, green or red emitting layr of TFEL devices, because hosts are same materials.
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