Spherical-shaped Zn2SiO4:Mn Phosphor Particles with Gd3+/Li+ Codopant

전체 글

(1)HWAHAK KONGHAK Vol. 40, No. 6, December, 2002, pp. 752-756. Gd3+/Li+. Zn SiO :Mn

(2) 2. 4.

(3) * †. .

(4) (2002 8 5 , 2002 9 26 ) *. Spherical-shaped Zn2SiO4:Mn Phosphor Particles with Gd3+/Li+ Codopant Hyun Sook Roh, Chang Hee Lee, Ho Shin Yoon, Yun Chan Kang†, Hee Dong Park and Seung Bin Park* Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea *Department of Chemical & Biomolecular Engineering, KAIST, Daejeon 305-701, Korea (Received 5 August 2002; accepted 26 September 2002). Zn SiO :Mn

(5) , !"# Gd /Li $%& '() *+& ,-./ 01. 23 45 67 8 9 : ; Zn SiO :Mn # <= ># 7 - ?@ 23 A B@ C (D1. Gd /Li EF@ Zn SiO :Mn *+ & G, HIJK L8 EF Gd /Li $%& '(EJM ;N OP 9 *Q ,-./ R.S 2T UV W

(6) X1. 8 Gd /Li YZ[ Zn SiO :Mn

(7) 9 \] ^# *+& _# `a8 1. 0.1 mol% Gd /Li $% CE 1,145 C ^ 9 5[ Zn SiO :Mn # -b c 5% d@ * Qe 5.7 ms R.S (D1. PDP(Plasma Dislpay Panel). . Zn2SiO4 wellimite Si4+ 14 nm fumed silica , , ,. 2 3+. 4 +. 2. 3+. 2. 3+. 4. +. 3+. +. 2. 3+. 2. 4. +. 4. +. o. 4. Abstract − Green-emitting Zn2SiO4:Mn phosphors for PDP(Plasma Display Panel) application were synthesized by colloidal seed-assisted spray pyrolysis process. The codoping with Gd3+/Li+, which replaces Si4+ site in the willemite structure, was performed to improve the luminous properties of the Zn2SiO4:Mn phosphors. The particles prepared by spray pyrolysis process using fumed silica colloidal solution had a spherical shape, small particle size, narrow size distribution, and non-aggregation characteristics. The Gd3+/Li+ codoping amount affected the luminous characteristics of Zn2SiO4:Mn phosphors. The codoping with proper amounts of Gd3+/Li+ improved both the photoluminescence efficiency and decay time of Zn2SiO4:Mn phosphor particles. In spray pyrolysis, the post-treatment temperature is another factor controlling the luminous performance of Zn2SiO4:Mn phosphors. The Zn1.9SiO4:Mn0.1 phosphor particles containing 0.1 mol% Gd3+/Li+ co-dopant had a 5% higher PL intensity than the commercial product and 5.7 ms decay time after post-treatment at 1,145 oC. Key words: Phosphor, Spray pyrolysis, Codopant, Decay time. 1.. . bc .- d efg( 147 nm 173 nm hi jklm I no ! pqgr! jk lm Gs

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(78) 6) Zn SiO :Mn <x <d Zn2SiO4:Mn. 2+. 3+. 2. 3+. 4. 6. 1. 1. 2. 2. 4. 4. 2. 2+. 3+. 3+. 4. +. +. 1.9. 1-y. 4. 0.1 o. o. 2 3+. 4. 2+. y. 3+. y. +. 4 +. 2. 4. HWAHAK KONGHAK Vol. 40, No. 6, December, 2002.

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(159) Fig. 7. Emission spectra of Gd3+/Li+ co-doped Zn2SiO4:Mn phosphors post-treated at different temperatures.. x& Gd /Li # codoping dI !" <x e<°I Hd3 ' !5. Gd /Li codoping Ìa Ý ~\ Æ# y !", q <xÔ5 @D e<7 äp <dI :(. <x# ¸& ' !5. 3+. +. 3+. +. 4.. . q Zn SiO :Mn í8 <x e<°I Sg ¹$ fumed ¢l# -x! qg( !Â U ~U$ºI ¢gû B l\# Kõg( Gd /Li ¾# ðgû5. ¸Õ ¢l( jÕ 67 , |D ¢lÉ, ¡D ¢ U£ E ÇÜI ,-!5. ¾# ð !" <dI Hd3 '( ! , e< g3( %a# Ô - Ô4»a( \, U ~U$º

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(163) $ 5% @D e< äp <dI ·5. ÈC, Gd /Li ¾ a ð( PDP silica , Si4+. 2. 2. 2. 4. 3+. +. 3+. +. 3+. +. 4. 4. 3+. 40 6 2002 12. +. 1. Copeland, T. S., Lee, B. I., Qi, J. and Elrod, A. K.: J. Lumin., 97, 168 (2002). 2. Lu, S. W., Copeland, T., Lee, B. I., Tong, W., Wagner, B. K., Park, W. and Zhang, F.: J. Phys. & Chem. Solids, 62, 777(2001). 3. Su, K., Tilley, T. D. and Sailor, M. J.: J. Am. Chem. Soc., 118, 3459 (1996). 4. Lenggoro, I. W., Iskandar, F., Mizushima, H., Xia, B., Okuyama, K. and Kijima, N.: Jpn. J. Appl. Phys., 39, L1051(2000). 5. Hampden-Smith, M. J., Kodas, T. T. and Caruso, J.: U. S. Patent, 6,180,029 B1(2001). 6. Kang, Y. C., Roh, H. S. and Park, S. B.: Adv. Mater., 12, 451(2000). 7. Morell, A. and Khiati, N. E: J. Electrochem. Soc., 140, 2019(1993). 8. Chang, I. F., Brownlow, J. W., Sun, T. I. and Wilson, J. S.: J. Electrochem. Soc., 136, 3532(1989). 9. Ronda, C. R. and Amrein, T.: J. Lumin., 69, 245(1996). 10. Barthou, C., Benoit, J., Benalloul, P. and Morell, A.: J. Electrochem. Soc., 141, 524(1994). 11. Sohn, K. S., Cho, B., Chang, H. and Park, H. D.: J. Electrochem. Soc., 146, 2353(1999). 12. van der, Kolk, E., Dorenbos, P., van Rijk, C. W. E., Bechtel, H., Jüstel, T., Nikol, H., Ronda, C. R. and Wiechert, D. U.: J. Lumin., 8789, 1246(2000). 13. Seong, B. Y., Han, C., Park, H. D. and Kim, D. S.: J. Kor. Ceram. Soc., 38, 337(2001)..

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Spherical-shaped Zn<sub>2</sub>SiO<sub>4</sub>:Mn Phosphor Particles with Gd<sup>3+</sup>/Li<sup>+</sup> Codopant