Fluorescent properties of a green- to red-emitting Eu3+, Tb3+ codoped amorphous calcium silicate phosphor

The excitation wavelength of conventional Tb3+-activated phosphor is near 270 nm. This study describes novel green-emitting Tb3+-activated amorphous calcium silicate by ultraviolet excitation at 378 nm. The Tb3+-activated amorphous calcium silicate was prepared by heating a sample of Tb3+-activated calcium silicate hydrate (CSH) at 900°C for 30 minutes. The emission wavelength of the resulting phosphor was 544 nm. The optimum excitation wavelength within the range 300–400 nm was 378 nm. The Tb3+-activated amorphous calcium silicate emitted green by ultraviolet irradiation. The optimum initial Tb/Ca atomic ratio of this phosphor was about 0.5. A mechanism for the action of the phosphor is proposed, in which Tb3+ions existing in the layer of the CSH lead to loss of water molecules and OH groups.

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Photoluminescence Properties of a New Orange-Red-Emitting Sm3+-Doped Potassium Calcium Silicate Phosphor

Science of Advanced Materials ◽

10.1166/sam.2017.2332 ◽

2017 ◽

Vol 9 (3) ◽

pp. 514-518

Author(s):

Ruijin Yu ◽

Mengfan He ◽

Nannan Xie ◽

Hyeon Mi Noh ◽

Byung Kee Moon ◽

...

Keyword(s):

Calcium Silicate ◽

Photoluminescence Properties ◽

Silicate Phosphor

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Preparation and fluorescence property of red-emitting Eu3+-activated amorphous calcium silicate phosphor

Materials Research Bulletin ◽

10.1016/j.materresbull.2009.09.032 ◽

2010 ◽

Vol 45 (2) ◽

pp. 121-123 ◽

Cited By ~ 14

Author(s):

Yoshiyuki Kojima ◽

Shinnosuke Kamei ◽

Nobuyuki Nishimiya

Keyword(s):

Calcium Silicate ◽

Fluorescence Property ◽

Silicate Phosphor

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Synthesis of orange emitting Sm3+ doped sodium calcium silicate phosphor by sol-gel method for photonic device applications

Ceramics International ◽

10.1016/j.ceramint.2020.04.224 ◽

2020 ◽

Vol 46 (16) ◽

pp. 26434-26439 ◽

Cited By ~ 3

Author(s):

Harpreet Kaur ◽

M. Jayasimhadri ◽

Mukesh K. Sahu ◽

P. Koteswara Rao ◽

N.S. Reddy

Keyword(s):

Calcium Silicate ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Photonic Device ◽

Silicate Phosphor ◽

Sodium Calcium ◽

Device Applications

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Fluorescent properties of a blue-to green-emitting Ce3+, Tb3+ codoped amorphous calcium silicate phosphors

Journal of Luminescence ◽

10.1016/j.jlumin.2012.06.008 ◽

2012 ◽

Vol 132 (11) ◽

pp. 2992-2996 ◽

Cited By ~ 17

Author(s):

Yoshiyuki Kojima ◽

Masaaki Numazawa ◽

Tetsuo Umegaki

Keyword(s):

Calcium Silicate ◽

Fluorescent Properties ◽

Silicate Phosphors

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SYNTHESIS, CHARACTERIZATION AND PHOTOLUMINESCENCE PROPERTIES OF EU3+DOPED CALCIUM SILICATE PHOSPHOR BY CONVENTIONAL SOLID STATE REACTION METHOD

International Journal of Advanced Research ◽

10.21474/ijar01/12209 ◽

2020 ◽

Vol 8 (12) ◽

pp. 762-769

Author(s):

Ch. Atchyutha Rao ◽

◽

K.V.R. Murthy ◽

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Calcium Silicate ◽

Solid State Reaction Method ◽

High Temperature Strength ◽

Photoluminescence Properties ◽

Conventional Solid State Reaction ◽

Excitation Light ◽

Reaction Method ◽

Silicate Phosphor

Calcium Silicate phosphor acquires a higher luminous efficiency when it is doped with rare earth activated ions. Silicate phosphors are used for a fluorescent, a cathode-ray tube, a luminous body, a vacuum ultraviolet excitation light emitting element etc. The silicates of calcium are known for their thermal stability, high temperature strength, low thermal expansion, cheep residence and chemical inertness. The present paper reports on the synthesis, characterization and photoluminescence properties of Eu3+ doped calcium silicate phosphor prepared by conventional solid state reaction method heating at 12000C for 3 hrs. The received cakes are grounded for 30 minutes each. The phosphors are prepared and the received powder is subjected to PL, XRD, SEM, EDAX and CIE analysis. The following section discusses and the experimental results are mentioned in these phosphors. The present Phosphor can act as a host for red light emission in many display devices and technological applications.

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