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What is europium and dysprosium doped strontium aluminate phosphor?

What is europium and dysprosium doped strontium aluminate phosphor?

Strontium aluminate europium-doped dysprosium phosphor is a special luminescent material mainly used in the field of optoelectronics, especially in lighting and display technology. The basic component of this material is strontium aluminate (SrAl2O4), whose luminescent properties are activated by doping with the rare earth elements europium (Eu) and dysprosium (Dy).

The basic principle of europium and dysprosium doped strontium aluminate phosphor:

– Strontium Aluminate (SrAl2O4) is an alkaline earth metal aluminate that does not emit light by itself, but as a matrix material, it can be stably doped with an activator.

– Europium (Eu) is a commonly used activator that absorbs energy and re-radiates visible light. When europium is doped in strontium aluminate, the Eu ions jump from the ground state to the excited state when the material is excited by external energy (e.g., ultraviolet or blue light) and then release energy when it returns to the ground state, resulting in the phenomenon of luminescence. Europium-activated strontium aluminate emits mainly yellow-green light.

Dysprosium (Dy) is usually added as a co-activator, which creates an energy trap and extends the material’s afterglow time. In other words, dysprosium-doped strontium aluminate phosphors can keep emitting light for a longer period of time when the excitation light source is removed, exhibiting the so-called long afterglow property.

strontium aluminate europium-doped dysprosium phosphors
strontium aluminate europium-doped dysprosium phosphors

Applications of strontium aluminate europium-doped dysprosium phosphors:

These phosphors are mainly used in:

– Long afterglow materials: such as safety signs, emergency exit signs, watch hands, etc., which can continue to emit light at night or in dark places.

– White LED: By cooperating with blue LED chips, strontium aluminate europium-doped dysprosium phosphor can convert part of the blue light into yellow-green light and mix with the remaining blue light to generate white light, which is widely used in LED lighting and display technology.

– Other optoelectronic components: such as flat panel displays, optical storage devices, etc.

Preparation of strontium aluminate europium-doped dysprosium phosphor:

The preparation process usually includes precise weighing of raw materials, mixing, grinding to achieve uniform dispersion, and then high-temperature sintering. The sintering temperature and time need to be strictly controlled to ensure that the crystal structure of the phosphor is complete and the activator is evenly distributed. Sometimes it is also necessary to pulverize and screen the powder to achieve the required particle size distribution to ensure the luminous efficiency and application performance. During the sintering process, additional bonding agents may not be required, as components of the feedstock (e.g., silica) act as a natural bonding medium on their own.

Suppliers of Strontium Aluminate Europium-Doped Dysprosium Fluorescent Powder

Main Ingredients: Strontium Aluminate>96%, Europium-Doped Dysprosium Oxide<2%, Europium-Doped Dysprosium Oxide <2%.

This product belongs to the inorganic rare earth aluminate long afterglow luminescent material, absorbing all kinds of visible light for 10-20 minutes. It can be continuously luminous in the darkness for more than 12 hours, and its luminous brightness and duration are more than 30 times of the traditional luminous material represented by ZnS: Cu, and it can be used indefinitely and repeatedly.

Tested by professional organizations, the product is non-toxic, non-radioactive, and chemically stable.

The product can be made into all kinds of luminous products and has been widely used in fire fighting, geographical name signs, home appliances, clocks and watches, fisheries, clothing, crafts and gifts, and other industries. It can also be used in oil-based paints, inks, or plastics.

Strontium Aluminate Europium-Doped Dysprosium Fluorescent Powder supplier

Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials.

If you are looking for high-quality Strontium Aluminate Europium-Doped Dysprosium Fluorescent Powder, please feel free to contact us and send an inquiry. (

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